diff --git a/app/utils/ember-versions.js b/app/utils/ember-versions.js
index c5fcff1..0b546a6 100644
--- a/app/utils/ember-versions.js
+++ b/app/utils/ember-versions.js
@@ -98,4 +98,5 @@ export const VERSIONS = Object.freeze([
   '5.0',
   '5.1',
   '5.2',
+  '5.3',
 ]);
diff --git a/source/ember-cli-changes/5.3.md b/source/ember-cli-changes/5.3.md
new file mode 100644
index 0000000..7695415
--- /dev/null
+++ b/source/ember-cli-changes/5.3.md
@@ -0,0 +1,12 @@
+---
+version: "5.3"
+changes:
+  -
+    deprecation: true
+    title: "#10162 [ENHANCEMENT] Deprecate outputPaths build option"
+    link: https://blog.emberjs.com/ember-released-5-3"
+  -
+    feature: true
+    title: "#10337 - the feature flag for pnpm support was removed, officially allowing using of the --pnpm flag"
+    link: https://blog.emberjs.com/ember-released-5-3"
+---
diff --git a/source/ember-data-changes/5.3.md b/source/ember-data-changes/5.3.md
new file mode 100644
index 0000000..42730d6
--- /dev/null
+++ b/source/ember-data-changes/5.3.md
@@ -0,0 +1,60 @@
+---
+version: "5.3"
+changes:
+  -
+    deprecation: true
+    title: "#8747 feat: implement legacy imports deprecation"
+    link: "https://blog.emberjs.com/ember-released-5-3"
+  -
+    deprecation: true
+    title: "#8734 feat: Implement Strict Types and Id Deprecations"
+    link: "https://blog.emberjs.com/ember-released-5-3"
+  -
+    deprecation: true
+    title: "#8802 chore: fix fastboot-testing deprecation"
+    link: "https://blog.emberjs.com/ember-released-5-3"
+  -
+    deprecation: true
+    title: "#8801 chore: resolve deprecation in fastboot app"
+    link: "https://blog.emberjs.com/ember-released-5-3"
+  -
+    feature: true
+    title: "#8849 feat: docs, tests and fixes for create/update/deleteRecord builders"
+    link: "https://blog.emberjs.com/ember-released-5-3"
+  -
+    feature: true
+    title: "#8824 feat: relationshipRollback, serializePatch"
+    link: "https://blog.emberjs.com/ember-released-5-3"
+  -
+    feature: true
+    title: "#8798 feat: implement a simple LifetimeService utility, improve document reconstruction"
+    link: "https://blog.emberjs.com/ember-released-5-3"
+  -
+    feature: true
+    title: "#8741 feat: JSON:API serialization utils"
+    link: "https://blog.emberjs.com/ember-released-5-3"
+  -
+    feature: true
+    title: "#8740 feat: saveRecord builders"
+    link: "https://blog.emberjs.com/ember-released-5-3"
+  -
+    feature: true
+    title: "#8744 add sortQueryParams, update roadmap with link to checklist"
+    link: "https://blog.emberjs.com/ember-released-5-3"
+  -
+    feature: true
+    title: "#8716 feat: filterEmpty for query params"
+    link: "https://blog.emberjs.com/ember-released-5-3"
+  -
+    feature: true
+    title: "#8687 feat: findRecord and query request builders"
+    link: "https://blog.emberjs.com/ember-released-5-3"
+  -
+    feature: true
+    title: "#8673 DX: Nicer backtracking errors"
+    link: "https://blog.emberjs.com/ember-released-5-3"
+  -
+    feature: true
+    title: "#8736 chore: refactor IdentityCache to make resource more opaque"
+    link: "https://blog.emberjs.com/ember-released-5-3"
+---
diff --git a/source/ember-js-changes/5.3.md b/source/ember-js-changes/5.3.md
new file mode 100644
index 0000000..120104e
--- /dev/null
+++ b/source/ember-js-changes/5.3.md
@@ -0,0 +1,8 @@
+---
+version: "5.3"
+changes:
+  -
+    deprecation: true
+    title: "Deprecate implicit record loading in Ember Route per RFC #774."
+    link: "https://blog.emberjs.com/ember-released-5-3"
+---
diff --git a/tests/acceptance/changes-test.js b/tests/acceptance/changes-test.js
index a850d5e..29838da 100644
--- a/tests/acceptance/changes-test.js
+++ b/tests/acceptance/changes-test.js
@@ -27,8 +27,8 @@ module('Acceptance | changes', function (hooks) {
 
     assert.strictEqual(
       deprecationsInEmberJS.length,
-      29,
-      'We see 29 deprecations that occurred in Ember.js since version 3.15'
+      30,
+      'We see 30 deprecations that occurred in Ember.js since version 3.15'
     );
 
     // Check new features in Ember Data
@@ -38,8 +38,8 @@ module('Acceptance | changes', function (hooks) {
 
     assert.strictEqual(
       newFeaturesInEmberData.length,
-      11,
-      'We see 11 new feature that occurred in Ember Data since version 3.15'
+      21,
+      'We see 21 new feature that occurred in Ember Data since version 3.15'
     );
 
     // Check deprecations in Ember Data
@@ -49,8 +49,8 @@ module('Acceptance | changes', function (hooks) {
 
     assert.strictEqual(
       deprecationsInEmberData.length,
-      14,
-      'We see 14 deprecations that occurred in Ember Data since version 3.15'
+      18,
+      'We see 18 deprecations that occurred in Ember Data since version 3.15'
     );
 
     // Check new features in Ember CLI
@@ -60,8 +60,8 @@ module('Acceptance | changes', function (hooks) {
 
     assert.strictEqual(
       newFeaturesInEmberCLI.length,
-      59,
-      'We see 59 new features that occurred in Ember CLI since version 3.15'
+      60,
+      'We see 60 new features that occurred in Ember CLI since version 3.15'
     );
 
     // Check deprecations in Ember CLI
@@ -71,8 +71,8 @@ module('Acceptance | changes', function (hooks) {
 
     assert.strictEqual(
       deprecationsInEmberCLI.length,
-      8,
-      'We see 8 deprecations that occurred in Ember CLI since version 3.15'
+      9,
+      'We see 9 deprecations that occurred in Ember CLI since version 3.15'
     );
   });