diff --git a/gameserver/templatetags/bleach_allowlist.py b/gameserver/templatetags/bleach_allowlist.py
deleted file mode 100644
index bdecab9..0000000
--- a/gameserver/templatetags/bleach_allowlist.py
+++ /dev/null
@@ -1,1149 +0,0 @@
-# Based on https://github.com/DMOJ/online-judge/blob/master/judge/jinja2/markdown/bleach_whitelist.py , which is, in turn, based on https://github.com/yourcelf/bleach-whitelist/blob/master/bleach_whitelist/bleach_whitelist.py
-
-standard_styles = [
-    # Taken from https://developer.mozilla.org/en-US/docs/Web/CSS/Reference
-    # This includes pseudo-classes, pseudo-elements, @-rules, units, and
-    # selectors in addition to properties, but it doesn't matter for our
-    # purposes -- we don't need to filter styles..
-    ":active",
-    "::after (:after)",
-    "align-content",
-    "align-items",
-    "align-self",
-    "all",
-    "<angle>",
-    "animation",
-    "animation-delay",
-    "animation-direction",
-    "animation-duration",
-    "animation-fill-mode",
-    "animation-iteration-count",
-    "animation-name",
-    "animation-play-state",
-    "animation-timing-function",
-    "@annotation",
-    "annotation()",
-    "attr()",
-    "::backdrop",
-    "backface-visibility",
-    "background",
-    "background-attachment",
-    "background-blend-mode",
-    "background-clip",
-    "background-color",
-    "background-image",
-    "background-origin",
-    "background-position",
-    "background-repeat",
-    "background-size",
-    "<basic-shape>",
-    "::before (:before)",
-    "<blend-mode>",
-    "blur()",
-    "border",
-    "border-bottom",
-    "border-bottom-color",
-    "border-bottom-left-radius",
-    "border-bottom-right-radius",
-    "border-bottom-style",
-    "border-bottom-width",
-    "border-collapse",
-    "border-color",
-    "border-image",
-    "border-image-outset",
-    "border-image-repeat",
-    "border-image-slice",
-    "border-image-source",
-    "border-image-width",
-    "border-left",
-    "border-left-color",
-    "border-left-style",
-    "border-left-width",
-    "border-radius",
-    "border-right",
-    "border-right-color",
-    "border-right-style",
-    "border-right-width",
-    "border-spacing",
-    "border-style",
-    "border-top",
-    "border-top-color",
-    "border-top-left-radius",
-    "border-top-right-radius",
-    "border-top-style",
-    "border-top-width",
-    "border-width",
-    "bottom",
-    "box-decoration-break",
-    "box-shadow",
-    "box-sizing",
-    "break-after",
-    "break-before",
-    "break-inside",
-    "brightness()",
-    "calc()",
-    "caption-side",
-    "ch",
-    "@character-variant",
-    "character-variant()",
-    "@charset",
-    ":checked",
-    "circle()",
-    "clear",
-    "clip",
-    "clip-path",
-    "cm",
-    "color",
-    "<color>",
-    "columns",
-    "column-count",
-    "column-fill",
-    "column-gap",
-    "column-rule",
-    "column-rule-color",
-    "column-rule-style",
-    "column-rule-width",
-    "column-span",
-    "column-width",
-    "content",
-    "contrast()",
-    "<counter>",
-    "counter-increment",
-    "counter-reset",
-    "@counter-style",
-    "cubic-bezier()",
-    "cursor",
-    "<custom-ident>",
-    ":default",
-    "deg",
-    ":dir()",
-    "direction",
-    ":disabled",
-    "display",
-    "@document",
-    "dpcm",
-    "dpi",
-    "dppx",
-    "drop-shadow()",
-    "element()",
-    "ellipse()",
-    "em",
-    ":empty",
-    "empty-cells",
-    ":enabled",
-    "ex",
-    "filter",
-    ":first",
-    ":first-child",
-    "::first-letter",
-    "::first-line",
-    ":first-of-type",
-    "flex",
-    "flex-basis",
-    "flex-direction",
-    "flex-flow",
-    "flex-grow",
-    "flex-shrink",
-    "flex-wrap",
-    "float",
-    ":focus",
-    "font",
-    "@font-face",
-    "font-family",
-    "font-feature-settings",
-    "@font-feature-values",
-    "font-kerning",
-    "font-language-override",
-    "font-size",
-    "font-size-adjust",
-    "font-stretch",
-    "font-style",
-    "font-synthesis",
-    "font-variant",
-    "font-variant-alternates",
-    "font-variant-caps",
-    "font-variant-east-asian",
-    "font-variant-ligatures",
-    "font-variant-numeric",
-    "font-variant-position",
-    "font-weight",
-    "<frequency>",
-    ":fullscreen",
-    "grad",
-    "<gradient>",
-    "grayscale()",
-    "grid",
-    "grid-area",
-    "grid-auto-columns",
-    "grid-auto-flow",
-    "grid-auto-position",
-    "grid-auto-rows",
-    "grid-column",
-    "grid-column-start",
-    "grid-column-end",
-    "grid-row",
-    "grid-row-start",
-    "grid-row-end",
-    "grid-template",
-    "grid-template-areas",
-    "grid-template-rows",
-    "grid-template-columns",
-    "height",
-    ":hover",
-    "hsl()",
-    "hsla()",
-    "hue-rotate()",
-    "hyphens",
-    "hz",
-    "<image>",
-    "image()",
-    "image-rendering",
-    "image-resolution",
-    "image-orientation",
-    "ime-mode",
-    "@import",
-    "in",
-    ":indeterminate",
-    "inherit",
-    "initial",
-    ":in-range",
-    "inset()",
-    "<integer>",
-    ":invalid",
-    "invert()",
-    "isolation",
-    "justify-content",
-    "@keyframes",
-    "khz",
-    ":lang()",
-    ":last-child",
-    ":last-of-type",
-    "left",
-    ":left",
-    "<length>",
-    "letter-spacing",
-    "linear-gadient()",
-    "line-break",
-    "line-height",
-    ":link",
-    "list-style",
-    "list-style-image",
-    "list-style-position",
-    "list-style-type",
-    "margin",
-    "margin-bottom",
-    "margin-left",
-    "margin-right",
-    "margin-top",
-    "marks",
-    "mask",
-    "mask-type",
-    "matrix()",
-    "matrix3d()",
-    "max-height",
-    "max-width",
-    "@media",
-    "min-height",
-    "minmax()",
-    "min-width",
-    "mix-blend-mode",
-    "mm",
-    "ms",
-    "@namespace",
-    ":not()",
-    ":nth-child()",
-    ":nth-last-child()",
-    ":nth-last-of-type()",
-    ":nth-of-type()",
-    "<number>",
-    "object-fit",
-    "object-position",
-    ":only-child",
-    ":only-of-type",
-    "opacity",
-    "opacity()",
-    ":optional",
-    "order",
-    "@ornaments",
-    "ornaments()",
-    "orphans",
-    "outline",
-    "outline-color",
-    "outline-offset",
-    "outline-style",
-    "outline-width",
-    ":out-of-range",
-    "overflow",
-    "overflow-wrap",
-    "overflow-x",
-    "overflow-y",
-    "padding",
-    "padding-bottom",
-    "padding-left",
-    "padding-right",
-    "padding-top",
-    "@page",
-    "page-break-after",
-    "page-break-before",
-    "page-break-inside",
-    "pc",
-    "<percentage>",
-    "perspective",
-    "perspective()",
-    "perspective-origin",
-    "pointer-events",
-    "polygon()",
-    "position",
-    "<position>",
-    "pt",
-    "px",
-    "quotes",
-    "rad",
-    "radial-gradient()",
-    "<ratio>",
-    ":read-only",
-    ":read-write",
-    "rect()",
-    "rem",
-    "repeat()",
-    "::repeat-index",
-    "::repeat-item",
-    "repeating-linear-gradient()",
-    "repeating-radial-gradient()",
-    ":required",
-    "resize",
-    "<resolution>",
-    "rgb()",
-    "rgba()",
-    "right",
-    ":right",
-    ":root",
-    "rotate()",
-    "rotatex()",
-    "rotatey()",
-    "rotatez()",
-    "rotate3d()",
-    "ruby-align",
-    "ruby-merge",
-    "ruby-position",
-    "s",
-    "saturate()",
-    "scale()",
-    "scalex()",
-    "scaley()",
-    "scalez()",
-    "scale3d()",
-    ":scope",
-    "scroll-behavior",
-    "::selection",
-    "sepia()",
-    "<shape>",
-    "shape-image-threshold",
-    "shape-margin",
-    "shape-outside",
-    "skew()",
-    "skewx()",
-    "skewy()",
-    "steps()",
-    "<string>",
-    "@styleset",
-    "styleset()",
-    "@stylistic",
-    "stylistic()",
-    "@supports",
-    "@swash",
-    "swash()",
-    "symbol()",
-    "table-layout",
-    "tab-size",
-    ":target",
-    "text-align",
-    "text-align-last",
-    "text-combine-upright",
-    "text-decoration",
-    "text-decoration-color",
-    "text-decoration-line",
-    "text-decoration-style",
-    "text-indent",
-    "text-orientation",
-    "text-overflow",
-    "text-rendering",
-    "text-shadow",
-    "text-transform",
-    "text-underline-position",
-    "<time>",
-    "<timing-function>",
-    "top",
-    "touch-action",
-    "transform",
-    "transform-origin",
-    "transform-style",
-    "transition",
-    "transition-delay",
-    "transition-duration",
-    "transition-property",
-    "transition-timing-function",
-    "translate()",
-    "translatex()",
-    "translatey()",
-    "translatez()",
-    "translate3d()",
-    "turn",
-    "unicode-bidi",
-    "unicode-range",
-    "unset",
-    "<uri>",
-    "url()",
-    "<user-ident>",
-    ":valid",
-    "::value",
-    "var()",
-    "vertical-align",
-    "vh",
-    "@viewport",
-    "visibility",
-    ":visited",
-    "vmax",
-    "vmin",
-    "vw",
-    "white-space",
-    "widows",
-    "width",
-    "will-change",
-    "word-break",
-    "word-spacing",
-    "word-wrap",
-    "writing-mode",
-    "z-index",
-]
-
-all_prefixed_styles = [
-    # From http://peter.sh/experiments/vendor-prefixed-css-property-overview/
-    "-ms-accelerator",
-    "-webkit-app-region",
-    "-webkit-appearance",
-    "-webkit-appearance",
-    "-moz-appearance",
-    "-webkit-aspect-ratio",
-    "-webkit-backdrop-filter",
-    "backface-visibility",
-    "-webkit-backface-visibility",
-    "backface-visibility",
-    "backface-visibility",
-    "-webkit-background-composite",
-    "-webkit-background-composite",
-    "-moz-binding",
-    "-ms-block-progression",
-    "-webkit-border-after",
-    "-webkit-border-after",
-    "-webkit-border-after-color",
-    "-webkit-border-after-color",
-    "-webkit-border-after-style",
-    "-webkit-border-after-style",
-    "-webkit-border-after-width",
-    "-webkit-border-after-width",
-    "-webkit-border-before",
-    "-webkit-border-before",
-    "-webkit-border-before-color",
-    "-webkit-border-before-color",
-    "-webkit-border-before-style",
-    "-webkit-border-before-style",
-    "-webkit-border-before-width",
-    "-webkit-border-before-width",
-    "-moz-border-bottom-colors",
-    "-webkit-border-end",
-    "-webkit-border-end",
-    "-moz-border-end",
-    "-webkit-border-end-color",
-    "-webkit-border-end-color",
-    "-moz-border-end-color",
-    "-webkit-border-end-style",
-    "-webkit-border-end-style",
-    "-moz-border-end-style",
-    "-webkit-border-end-width",
-    "-webkit-border-end-width",
-    "-moz-border-end-width",
-    "-webkit-border-fit",
-    "-webkit-border-horizontal-spacing",
-    "-webkit-border-horizontal-spacing",
-    "-moz-border-left-colors",
-    "-moz-border-right-colors",
-    "-webkit-border-start",
-    "-webkit-border-start",
-    "-moz-border-start",
-    "-webkit-border-start-color",
-    "-webkit-border-start-color",
-    "-moz-border-start-color",
-    "-webkit-border-start-style",
-    "-webkit-border-start-style",
-    "-moz-border-start-style",
-    "-webkit-border-start-width",
-    "-webkit-border-start-width",
-    "-moz-border-start-width",
-    "-moz-border-top-colors",
-    "-webkit-border-vertical-spacing",
-    "-webkit-border-vertical-spacing",
-    "-webkit-box-align",
-    "-webkit-box-align",
-    "-moz-box-align",
-    "-webkit-box-decoration-break",
-    "-webkit-box-decoration-break",
-    "box-decoration-break",
-    "-webkit-box-direction",
-    "-webkit-box-direction",
-    "-moz-box-direction",
-    "-webkit-box-flex",
-    "-webkit-box-flex",
-    "-moz-box-flex",
-    "-webkit-box-flex-group",
-    "-webkit-box-flex-group",
-    "-webkit-box-lines",
-    "-webkit-box-lines",
-    "-webkit-box-ordinal-group",
-    "-webkit-box-ordinal-group",
-    "-moz-box-ordinal-group",
-    "-webkit-box-orient",
-    "-webkit-box-orient",
-    "-moz-box-orient",
-    "-webkit-box-pack",
-    "-webkit-box-pack",
-    "-moz-box-pack",
-    "-webkit-box-reflect",
-    "-webkit-box-reflect",
-    "clip-path",
-    "-webkit-clip-path",
-    "clip-path",
-    "clip-path",
-    "-webkit-color-correction",
-    "-webkit-column-axis",
-    "-webkit-column-break-after",
-    "-webkit-column-break-after",
-    "-webkit-column-break-before",
-    "-webkit-column-break-before",
-    "-webkit-column-break-inside",
-    "-webkit-column-break-inside",
-    "-webkit-column-count",
-    "column-count",
-    "-moz-column-count",
-    "column-count",
-    "column-fill",
-    "column-fill",
-    "-moz-column-fill",
-    "column-fill",
-    "-webkit-column-gap",
-    "column-gap",
-    "-moz-column-gap",
-    "column-gap",
-    "-webkit-column-rule",
-    "column-rule",
-    "-moz-column-rule",
-    "column-rule",
-    "-webkit-column-rule-color",
-    "column-rule-color",
-    "-moz-column-rule-color",
-    "column-rule-color",
-    "-webkit-column-rule-style",
-    "column-rule-style",
-    "-moz-column-rule-style",
-    "column-rule-style",
-    "-webkit-column-rule-width",
-    "column-rule-width",
-    "-moz-column-rule-width",
-    "column-rule-width",
-    "-webkit-column-span",
-    "column-span",
-    "column-span",
-    "-webkit-column-width",
-    "column-width",
-    "-moz-column-width",
-    "column-width",
-    "-webkit-columns",
-    "columns",
-    "-moz-columns",
-    "columns",
-    "-ms-content-zoom-chaining",
-    "-ms-content-zoom-limit",
-    "-ms-content-zoom-limit-max",
-    "-ms-content-zoom-limit-min",
-    "-ms-content-zoom-snap",
-    "-ms-content-zoom-snap-points",
-    "-ms-content-zoom-snap-type",
-    "-ms-content-zooming",
-    "-moz-control-character-visibility",
-    "-webkit-cursor-visibility",
-    "-webkit-dashboard-region",
-    "filter",
-    "-webkit-filter",
-    "filter",
-    "filter",
-    "-ms-flex-align",
-    "-ms-flex-item-align",
-    "-ms-flex-line-pack",
-    "-ms-flex-negative",
-    "-ms-flex-order",
-    "-ms-flex-pack",
-    "-ms-flex-positive",
-    "-ms-flex-preferred-size",
-    "-moz-float-edge",
-    "-webkit-flow-from",
-    "-ms-flow-from",
-    "-webkit-flow-into",
-    "-ms-flow-into",
-    "-webkit-font-feature-settings",
-    "-webkit-font-feature-settings",
-    "font-feature-settings",
-    "font-feature-settings",
-    "font-kerning",
-    "-webkit-font-kerning",
-    "font-kerning",
-    "-webkit-font-size-delta",
-    "-webkit-font-size-delta",
-    "-webkit-font-smoothing",
-    "-webkit-font-smoothing",
-    "font-variant-ligatures",
-    "-webkit-font-variant-ligatures",
-    "font-variant-ligatures",
-    "-moz-force-broken-image-icon",
-    "grid",
-    "-webkit-grid",
-    "grid",
-    "grid-area",
-    "-webkit-grid-area",
-    "grid-area",
-    "grid-auto-columns",
-    "-webkit-grid-auto-columns",
-    "grid-auto-columns",
-    "grid-auto-flow",
-    "-webkit-grid-auto-flow",
-    "grid-auto-flow",
-    "grid-auto-rows",
-    "-webkit-grid-auto-rows",
-    "grid-auto-rows",
-    "grid-column",
-    "-webkit-grid-column",
-    "grid-column",
-    "-ms-grid-column",
-    "-ms-grid-column-align",
-    "grid-column-end",
-    "-webkit-grid-column-end",
-    "grid-column-end",
-    "-ms-grid-column-span",
-    "grid-column-start",
-    "-webkit-grid-column-start",
-    "grid-column-start",
-    "-ms-grid-columns",
-    "grid-row",
-    "-webkit-grid-row",
-    "grid-row",
-    "-ms-grid-row",
-    "-ms-grid-row-align",
-    "grid-row-end",
-    "-webkit-grid-row-end",
-    "grid-row-end",
-    "-ms-grid-row-span",
-    "grid-row-start",
-    "-webkit-grid-row-start",
-    "grid-row-start",
-    "-ms-grid-rows",
-    "grid-template",
-    "-webkit-grid-template",
-    "grid-template",
-    "grid-template-areas",
-    "-webkit-grid-template-areas",
-    "grid-template-areas",
-    "grid-template-columns",
-    "-webkit-grid-template-columns",
-    "grid-template-columns",
-    "grid-template-rows",
-    "-webkit-grid-template-rows",
-    "grid-template-rows",
-    "-ms-high-contrast-adjust",
-    "-webkit-highlight",
-    "-webkit-hyphenate-character",
-    "-webkit-hyphenate-character",
-    "-webkit-hyphenate-limit-after",
-    "-webkit-hyphenate-limit-before",
-    "-ms-hyphenate-limit-chars",
-    "-webkit-hyphenate-limit-lines",
-    "-ms-hyphenate-limit-lines",
-    "-ms-hyphenate-limit-zone",
-    "-webkit-hyphens",
-    "-moz-hyphens",
-    "-ms-hyphens",
-    "-moz-image-region",
-    "-ms-ime-align",
-    "-webkit-initial-letter",
-    "-ms-interpolation-mode",
-    "justify-self",
-    "-webkit-justify-self",
-    "-webkit-line-align",
-    "-webkit-line-box-contain",
-    "-webkit-line-box-contain",
-    "-webkit-line-break",
-    "-webkit-line-break",
-    "line-break",
-    "-webkit-line-clamp",
-    "-webkit-line-clamp",
-    "-webkit-line-grid",
-    "-webkit-line-snap",
-    "-webkit-locale",
-    "-webkit-locale",
-    "-webkit-logical-height",
-    "-webkit-logical-height",
-    "-webkit-logical-width",
-    "-webkit-logical-width",
-    "-webkit-margin-after",
-    "-webkit-margin-after",
-    "-webkit-margin-after-collapse",
-    "-webkit-margin-after-collapse",
-    "-webkit-margin-before",
-    "-webkit-margin-before",
-    "-webkit-margin-before-collapse",
-    "-webkit-margin-before-collapse",
-    "-webkit-margin-bottom-collapse",
-    "-webkit-margin-bottom-collapse",
-    "-webkit-margin-collapse",
-    "-webkit-margin-collapse",
-    "-webkit-margin-end",
-    "-webkit-margin-end",
-    "-moz-margin-end",
-    "-webkit-margin-start",
-    "-webkit-margin-start",
-    "-moz-margin-start",
-    "-webkit-margin-top-collapse",
-    "-webkit-margin-top-collapse",
-    "-webkit-marquee",
-    "-webkit-marquee-direction",
-    "-webkit-marquee-increment",
-    "-webkit-marquee-repetition",
-    "-webkit-marquee-speed",
-    "-webkit-marquee-style",
-    "mask",
-    "-webkit-mask",
-    "mask",
-    "-webkit-mask-box-image",
-    "-webkit-mask-box-image",
-    "-webkit-mask-box-image-outset",
-    "-webkit-mask-box-image-outset",
-    "-webkit-mask-box-image-repeat",
-    "-webkit-mask-box-image-repeat",
-    "-webkit-mask-box-image-slice",
-    "-webkit-mask-box-image-slice",
-    "-webkit-mask-box-image-source",
-    "-webkit-mask-box-image-source",
-    "-webkit-mask-box-image-width",
-    "-webkit-mask-box-image-width",
-    "-webkit-mask-clip",
-    "-webkit-mask-clip",
-    "-webkit-mask-composite",
-    "-webkit-mask-composite",
-    "-webkit-mask-image",
-    "-webkit-mask-image",
-    "-webkit-mask-origin",
-    "-webkit-mask-origin",
-    "-webkit-mask-position",
-    "-webkit-mask-position",
-    "-webkit-mask-position-x",
-    "-webkit-mask-position-x",
-    "-webkit-mask-position-y",
-    "-webkit-mask-position-y",
-    "-webkit-mask-repeat",
-    "-webkit-mask-repeat",
-    "-webkit-mask-repeat-x",
-    "-webkit-mask-repeat-x",
-    "-webkit-mask-repeat-y",
-    "-webkit-mask-repeat-y",
-    "-webkit-mask-size",
-    "-webkit-mask-size",
-    "mask-source-type",
-    "-webkit-mask-source-type",
-    "-moz-math-display",
-    "-moz-math-variant",
-    "-webkit-max-logical-height",
-    "-webkit-max-logical-height",
-    "-webkit-max-logical-width",
-    "-webkit-max-logical-width",
-    "-webkit-min-logical-height",
-    "-webkit-min-logical-height",
-    "-webkit-min-logical-width",
-    "-webkit-min-logical-width",
-    "-webkit-nbsp-mode",
-    "-moz-orient",
-    "-moz-osx-font-smoothing",
-    "-moz-outline-radius",
-    "-moz-outline-radius-bottomleft",
-    "-moz-outline-radius-bottomright",
-    "-moz-outline-radius-topleft",
-    "-moz-outline-radius-topright",
-    "-webkit-overflow-scrolling",
-    "-ms-overflow-style",
-    "-webkit-padding-after",
-    "-webkit-padding-after",
-    "-webkit-padding-before",
-    "-webkit-padding-before",
-    "-webkit-padding-end",
-    "-webkit-padding-end",
-    "-moz-padding-end",
-    "-webkit-padding-start",
-    "-webkit-padding-start",
-    "-moz-padding-start",
-    "perspective",
-    "-webkit-perspective",
-    "perspective",
-    "perspective",
-    "perspective-origin",
-    "-webkit-perspective-origin",
-    "perspective-origin",
-    "perspective-origin",
-    "-webkit-perspective-origin-x",
-    "-webkit-perspective-origin-x",
-    "perspective-origin-x",
-    "-webkit-perspective-origin-y",
-    "-webkit-perspective-origin-y",
-    "perspective-origin-y",
-    "-webkit-print-color-adjust",
-    "-webkit-print-color-adjust",
-    "-webkit-region-break-after",
-    "-webkit-region-break-before",
-    "-webkit-region-break-inside",
-    "-webkit-region-fragment",
-    "-webkit-rtl-ordering",
-    "-webkit-rtl-ordering",
-    "-webkit-ruby-position",
-    "-webkit-ruby-position",
-    "ruby-position",
-    "-moz-script-level",
-    "-moz-script-min-size",
-    "-moz-script-size-multiplier",
-    "-ms-scroll-chaining",
-    "-ms-scroll-limit",
-    "-ms-scroll-limit-x-max",
-    "-ms-scroll-limit-x-min",
-    "-ms-scroll-limit-y-max",
-    "-ms-scroll-limit-y-min",
-    "-ms-scroll-rails",
-    "-webkit-scroll-snap-coordinate",
-    "-webkit-scroll-snap-destination",
-    "-webkit-scroll-snap-points-x",
-    "-ms-scroll-snap-points-x",
-    "-webkit-scroll-snap-points-y",
-    "-ms-scroll-snap-points-y",
-    "-webkit-scroll-snap-type",
-    "-ms-scroll-snap-type",
-    "-ms-scroll-snap-x",
-    "-ms-scroll-snap-y",
-    "-ms-scroll-translation",
-    "-ms-scrollbar-3dlight-color",
-    "shape-image-threshold",
-    "-webkit-shape-image-threshold",
-    "shape-margin",
-    "-webkit-shape-margin",
-    "shape-outside",
-    "-webkit-shape-outside",
-    "-moz-stack-sizing",
-    "tab-size",
-    "tab-size",
-    "-moz-tab-size",
-    "-webkit-tap-highlight-color",
-    "-webkit-tap-highlight-color",
-    "text-align-last",
-    "-webkit-text-align-last",
-    "-moz-text-align-last",
-    "text-align-last",
-    "-webkit-text-combine",
-    "-webkit-text-combine",
-    "-ms-text-combine-horizontal",
-    "text-decoration-color",
-    "-webkit-text-decoration-color",
-    "text-decoration-color",
-    "text-decoration-color",
-    "text-decoration-line",
-    "-webkit-text-decoration-line",
-    "text-decoration-line",
-    "-webkit-text-decoration-skip",
-    "text-decoration-style",
-    "-webkit-text-decoration-style",
-    "text-decoration-style",
-    "-webkit-text-decorations-in-effect",
-    "-webkit-text-decorations-in-effect",
-    "-webkit-text-emphasis",
-    "text-emphasis",
-    "-webkit-text-emphasis-color",
-    "text-emphasis-color",
-    "-webkit-text-emphasis-position",
-    "text-emphasis-position",
-    "-webkit-text-emphasis-style",
-    "text-emphasis-style",
-    "-webkit-text-fill-color",
-    "-webkit-text-fill-color",
-    "text-justify",
-    "-webkit-text-justify",
-    "text-justify",
-    "-webkit-text-orientation",
-    "-webkit-text-orientation",
-    "text-orientation",
-    "-webkit-text-security",
-    "-webkit-text-security",
-    "-webkit-text-size-adjust",
-    "-moz-text-size-adjust",
-    "-ms-text-size-adjust",
-    "-webkit-text-stroke",
-    "-webkit-text-stroke",
-    "-webkit-text-stroke-color",
-    "-webkit-text-stroke-color",
-    "-webkit-text-stroke-width",
-    "-webkit-text-stroke-width",
-    "text-underline-position",
-    "-webkit-text-underline-position",
-    "text-underline-position",
-    "-webkit-touch-callout",
-    "-ms-touch-select",
-    "transform",
-    "-webkit-transform",
-    "transform",
-    "transform",
-    "transform-origin",
-    "-webkit-transform-origin",
-    "transform-origin",
-    "transform-origin",
-    "-webkit-transform-origin-x",
-    "-webkit-transform-origin-x",
-    "transform-origin-x",
-    "-webkit-transform-origin-y",
-    "-webkit-transform-origin-y",
-    "transform-origin-y",
-    "-webkit-transform-origin-z",
-    "-webkit-transform-origin-z",
-    "transform-origin-z",
-    "transform-style",
-    "-webkit-transform-style",
-    "transform-style",
-    "transform-style",
-    "-webkit-user-drag",
-    "-webkit-user-drag",
-    "-moz-user-focus",
-    "-moz-user-input",
-    "-webkit-user-modify",
-    "-webkit-user-modify",
-    "-moz-user-modify",
-    "-webkit-user-select",
-    "-webkit-user-select",
-    "-moz-user-select",
-    "-ms-user-select",
-    "-moz-window-dragging",
-    "-moz-window-shadow",
-    "-ms-wrap-flow",
-    "-ms-wrap-margin",
-    "-ms-wrap-through",
-    "writing-mode",
-    "-webkit-writing-mode",
-    "writing-mode",
-    "writing-mode",
-]
-
-all_styles = standard_styles + all_prefixed_styles
-
-mathml_tags = [
-    "abs",
-    "and",
-    "annotation",
-    "annotation-xml",
-    "apply",
-    "approx",
-    "arccos",
-    "arccosh",
-    "arccot",
-    "arccoth",
-    "arccsc",
-    "arccsch",
-    "arcsec",
-    "arcsech",
-    "arcsin",
-    "arcsinh",
-    "arctan",
-    "arctanh",
-    "arg",
-    "bind",
-    "bvar",
-    "card",
-    "cartesianproduct",
-    "cbytes",
-    "ceiling",
-    "cerror",
-    "ci",
-    "cn",
-    "codomain",
-    "complexes",
-    "compose",
-    "condition",
-    "conjugate",
-    "cos",
-    "cosh",
-    "cot",
-    "coth",
-    "cs",
-    "csc",
-    "csch",
-    "csymbol",
-    "curl",
-    "declare",
-    "degree",
-    "determinant",
-    "diff",
-    "divergence",
-    "divide",
-    "domain",
-    "domainofapplication",
-    "emptyset",
-    "encoding",
-    "eq",
-    "equivalent",
-    "eulergamma",
-    "exists",
-    "exp",
-    "exponentiale",
-    "factorial",
-    "factorof",
-    "false",
-    "floor",
-    "fn",
-    "forall",
-    "function",
-    "gcd",
-    "geq",
-    "grad",
-    "gt",
-    "ident",
-    "image",
-    "imaginary",
-    "imaginaryi",
-    "implies",
-    "in",
-    "infinity",
-    "int",
-    "integers",
-    "intersect",
-    "interval",
-    "inverse",
-    "lambda",
-    "laplacian",
-    "lcm",
-    "leq",
-    "limit",
-    "list",
-    "ln",
-    "log",
-    "logbase",
-    "lowlimit",
-    "lt",
-    "maction",
-    "malign",
-    "maligngroup",
-    "malignmark",
-    "malignscope",
-    "math",
-    "matrix",
-    "matrixrow",
-    "max",
-    "mean",
-    "median",
-    "menclose",
-    "merror",
-    "mfenced",
-    "mfrac",
-    "mfraction",
-    "mglyph",
-    "mi",
-    "min",
-    "minus",
-    "mlabeledtr",
-    "mlongdiv",
-    "mmultiscripts",
-    "mn",
-    "mo",
-    "mode",
-    "moment",
-    "momentabout",
-    "mover",
-    "mpadded",
-    "mphantom",
-    "mprescripts",
-    "mroot",
-    "mrow",
-    "ms",
-    "mscarries",
-    "mscarry",
-    "msgroup",
-    "msline",
-    "mspace",
-    "msqrt",
-    "msrow",
-    "mstack",
-    "mstyle",
-    "msub",
-    "msubsup",
-    "msup",
-    "mtable",
-    "mtd",
-    "mtext",
-    "mtr",
-    "munder",
-    "munderover",
-    "naturalnumbers",
-    "neq",
-    "none",
-    "not",
-    "notanumber",
-    "notin",
-    "notprsubset",
-    "notsubset",
-    "or",
-    "otherwise",
-    "outerproduct",
-    "partialdiff",
-    "pi",
-    "piece",
-    "piecewice",
-    "piecewise",
-    "plus",
-    "power",
-    "primes",
-    "product",
-    "prsubset",
-    "quotient",
-    "rationals",
-    "real",
-    "reals",
-    "reln",
-    "rem",
-    "root",
-    "scalarproduct",
-    "sdev",
-    "sec",
-    "sech",
-    "select",
-    "selector",
-    "semantics",
-    "sep",
-    "set",
-    "setdiff",
-    "share",
-    "sin",
-    "sinh",
-    "span",
-    "subset",
-    "sum",
-    "tan",
-    "tanh",
-    "tendsto",
-    "times",
-    "transpose",
-    "true",
-    "union",
-    "uplimit",
-    "var",
-    "variance",
-    "vector",
-    "vectorproduct",
-    "xor",
-]
diff --git a/gameserver/templatetags/markdown_tags.py b/gameserver/templatetags/markdown_tags.py
index cb01f4f..b536f32 100644
--- a/gameserver/templatetags/markdown_tags.py
+++ b/gameserver/templatetags/markdown_tags.py
@@ -1,13 +1,14 @@
 import re
 
 import bleach.sanitizer as sanitizer
+import bleach_allowlist
 import mistune
+from bleach.css_sanitizer import CSSSanitizer
 from django import template
 from django.conf import settings
 from django.template.defaultfilters import stringfilter
 from django.utils.safestring import mark_safe
 
-from . import bleach_allowlist
 
 render = mistune.create_markdown(
     renderer=mistune.HTMLRenderer(escape=False),
@@ -46,12 +47,12 @@ def bodge_replace(match):
         "iframe": ["src", "frameborder", "class"],
         "img": ["alt", "src", "style", "class"],
     },
-    styles=[*bleach_allowlist.all_styles, "markdown-embed"],
     protocols=[
         "https",
         "mailto",
     ],
     strip=True,
+    css_sanitizer=CSSSanitizer(allowed_css_properties=[*bleach_allowlist.all_styles, "markdown-embed"]),
 )
 
 
diff --git a/poetry.lock b/poetry.lock
index ae44f3a..88f094d 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -155,20 +155,33 @@ tests-no-zope = ["attrs[tests-mypy]", "cloudpickle", "hypothesis", "pympler", "p
 
 [[package]]
 name = "bleach"
-version = "4.1.0"
+version = "6.1.0"
 description = "An easy safelist-based HTML-sanitizing tool."
 optional = false
-python-versions = ">=3.6"
+python-versions = ">=3.8"
 files = [
-    {file = "bleach-4.1.0-py2.py3-none-any.whl", hash = "sha256:4d2651ab93271d1129ac9cbc679f524565cc8a1b791909c4a51eac4446a15994"},
-    {file = "bleach-4.1.0.tar.gz", hash = "sha256:0900d8b37eba61a802ee40ac0061f8c2b5dee29c1927dd1d233e075ebf5a71da"},
+    {file = "bleach-6.1.0-py3-none-any.whl", hash = "sha256:3225f354cfc436b9789c66c4ee030194bee0568fbf9cbdad3bc8b5c26c5f12b6"},
+    {file = "bleach-6.1.0.tar.gz", hash = "sha256:0a31f1837963c41d46bbf1331b8778e1308ea0791db03cc4e7357b97cf42a8fe"},
 ]
 
 [package.dependencies]
-packaging = "*"
 six = ">=1.9.0"
 webencodings = "*"
 
+[package.extras]
+css = ["tinycss2 (>=1.1.0,<1.3)"]
+
+[[package]]
+name = "bleach-allowlist"
+version = "1.0.3"
+description = "Curated lists of tags and attributes for sanitizing html"
+optional = false
+python-versions = "*"
+files = [
+    {file = "bleach-allowlist-1.0.3.tar.gz", hash = "sha256:56e22086079a0e6a3100ae99e4dbaf20eb2585486598eb0e994008a11428da9b"},
+    {file = "bleach_allowlist-1.0.3-py2.py3-none-any.whl", hash = "sha256:6427a3ac0baddf549703f1003ea53f411f3d7888524c94c00eb6ef1deb378899"},
+]
+
 [[package]]
 name = "cachetools"
 version = "5.3.3"
@@ -1317,15 +1330,33 @@ dev = ["build", "flake8"]
 doc = ["sphinx"]
 test = ["pytest", "pytest-cov"]
 
+[[package]]
+name = "tinycss2"
+version = "1.2.1"
+description = "A tiny CSS parser"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "tinycss2-1.2.1-py3-none-any.whl", hash = "sha256:2b80a96d41e7c3914b8cda8bc7f705a4d9c49275616e886103dd839dfc847847"},
+    {file = "tinycss2-1.2.1.tar.gz", hash = "sha256:8cff3a8f066c2ec677c06dbc7b45619804a6938478d9d73c284b29d14ecb0627"},
+]
+
+[package.dependencies]
+webencodings = ">=0.4"
+
+[package.extras]
+doc = ["sphinx", "sphinx_rtd_theme"]
+test = ["flake8", "isort", "pytest"]
+
 [[package]]
 name = "typing-extensions"
-version = "4.10.0"
+version = "4.11.0"
 description = "Backported and Experimental Type Hints for Python 3.8+"
 optional = false
 python-versions = ">=3.8"
 files = [
-    {file = "typing_extensions-4.10.0-py3-none-any.whl", hash = "sha256:69b1a937c3a517342112fb4c6df7e72fc39a38e7891a5730ed4985b5214b5475"},
-    {file = "typing_extensions-4.10.0.tar.gz", hash = "sha256:b0abd7c89e8fb96f98db18d86106ff1d90ab692004eb746cf6eda2682f91b3cb"},
+    {file = "typing_extensions-4.11.0-py3-none-any.whl", hash = "sha256:c1f94d72897edaf4ce775bb7558d5b79d8126906a14ea5ed1635921406c0387a"},
+    {file = "typing_extensions-4.11.0.tar.gz", hash = "sha256:83f085bd5ca59c80295fc2a82ab5dac679cbe02b9f33f7d83af68e241bea51b0"},
 ]
 
 [[package]]
@@ -1489,4 +1520,4 @@ multidict = ">=4.0"
 [metadata]
 lock-version = "2.0"
 python-versions = "^3.11.5"
-content-hash = "e2fa9973b64bbb868b271554505136edf7084539594fc4379752c10b361c69b2"
+content-hash = "31463d32ee95ec5efa0d2dc4cb74780706ab22f9d06f26f3380024c064d74123"
diff --git a/pyproject.toml b/pyproject.toml
index b99bcf0..6cd5569 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -17,7 +17,7 @@ classifiers = ["Topic :: Software Development"]
 [tool.poetry.dependencies]
 python = "^3.11.5"
 asgiref = "^3.8.1"
-bleach = "4.1.0"
+bleach = "^6.1.0"
 certifi = "^2024.2.2"
 cffi = "^1.16.0"
 Django = "^5.0.3"
@@ -38,6 +38,8 @@ gunicorn = "*"
 django-ninja = "^1.1.0"
 redis = "^5.0.3"
 aiohttp = "^3.9.3"
+bleach-allowlist = "^1.0.3"
+tinycss2 = "^1.2.1"
 
 [build-system]
 requires = ["poetry-core"]
@@ -63,4 +65,4 @@ ensure_newline_before_comments = true
 line_length = 100
 src_paths = ["mCTF", "gameserver"]
 extend_skip_glob = ['gameserver/migrations/*.py', 'mCTF/*', 'manage.py']
-py_version=311
\ No newline at end of file
+py_version=311