diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0705e666..511c66a0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,7 +15,9 @@ This project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.htm
 - Added `no-exclude` cli flag to disable excludes.
 - When given in standard library format, additional information now shows up in `incorrect_standard_library_use` missing required parameter errors.
 - Added new [`mixed_table` lint](https://kampfkarren.github.io/selene/lints/mixed_table.html), which will warn against mixed tables.
-- Added new [`fix`](https://kampfkarren.github.io/selene/cli/usage.html#fix) flag, which will automatically apply lint suggestions.
+- Added `bit32.byteswap` to Luau standard library
+- Added `buffer` library to Luau standard library
+- Added new [`--fix`](https://kampfkarren.github.io/selene/cli/usage.html#fix) flag, which will automatically apply lint suggestions.
 
 ### Fixed
 - `string.pack` and `string.unpack` now have proper function signatures in the Lua 5.3 standard library.
diff --git a/selene-lib/default_std/luau.yml b/selene-lib/default_std/luau.yml
index 8d41cb45..0243c110 100644
--- a/selene-lib/default_std/luau.yml
+++ b/selene-lib/default_std/luau.yml
@@ -29,6 +29,10 @@ globals:
     args:
       - type: "..."
     must_use: true
+  bit32.byteswap:
+    args:
+      - type: number
+    must_use: true
   bit32.countlz:
     args:
       - type: number
@@ -72,6 +76,154 @@ globals:
       - type: number
       - type: number
     must_use: true
+  buffer.copy:
+    args:
+      - type:
+          display: buffer
+      - type: number
+      - type:
+          display: buffer
+      - required: false
+        type: number
+      - required: false
+        type: number
+  buffer.create:
+    args:
+      - type: number
+    must_use: true
+  buffer.fill:
+    args:
+      - type:
+          display: buffer
+      - type: number
+      - type: number
+      - required: false
+        type: number
+  buffer.fromstring:
+    args:
+      - type: string
+    must_use: true
+  buffer.len:
+    args:
+      - type:
+          display: buffer
+    must_use: true
+  buffer.readf32:
+    args:
+      - type:
+          display: buffer
+      - type: number
+    must_use: true
+  buffer.readf64:
+    args:
+      - type:
+          display: buffer
+      - type: number
+    must_use: true
+  buffer.readi8:
+    args:
+      - type:
+          display: buffer
+      - type: number
+    must_use: true
+  buffer.readi16:
+    args:
+      - type:
+          display: buffer
+      - type: number
+    must_use: true
+  buffer.readi32:
+    args:
+      - type:
+          display: buffer
+      - type: number
+    must_use: true
+  buffer.readstring:
+    args:
+      - type:
+          display: buffer
+      - type: number
+      - type: number
+    must_use: true
+  buffer.readu8:
+    args:
+      - type:
+          display: buffer
+      - type: number
+    must_use: true
+  buffer.readu16:
+    args:
+      - type:
+          display: buffer
+      - type: number
+    must_use: true
+  buffer.readu32:
+    args:
+      - type:
+          display: buffer
+      - type: number
+    must_use: true
+  buffer.tostring:
+    args:
+      - type:
+          display: buffer
+    must_use: true
+  buffer.writef32:
+    args:
+      - type:
+          display: buffer
+      - type: number
+      - type: number
+  buffer.writef64:
+    args:
+      - type:
+          display: buffer
+      - type: number
+      - type: number
+  buffer.writei8:
+    args:
+      - type:
+          display: buffer
+      - type: number
+      - type: number
+  buffer.writei16:
+    args:
+      - type:
+          display: buffer
+      - type: number
+      - type: number
+  buffer.writei32:
+    args:
+      - type:
+          display: buffer
+      - type: number
+      - type: number
+  buffer.writestring:
+    args:
+      - type:
+          display: buffer
+      - type: number
+      - type: string
+      - required: false
+        type: number
+  buffer.writeu8:
+    args:
+      - type:
+          display: buffer
+      - type: number
+      - type: number
+  buffer.writeu16:
+    args:
+      - type:
+          display: buffer
+      - type: number
+      - type: number
+  buffer.writeu32:
+    args:
+      - type:
+          display: buffer
+      - type: number
+      - type: number
   collectgarbage:
     args:
       - type: