diff --git a/lib/jasmine-core/jasmine.js b/lib/jasmine-core/jasmine.js
index 0e1af983..811c0130 100644
--- a/lib/jasmine-core/jasmine.js
+++ b/lib/jasmine-core/jasmine.js
@@ -1353,7 +1353,7 @@ getJasmineRequireObj().Env = function(j$) {
         'stopOnSpecFailure',
         'stopSpecOnExpectationFailure',
         'autoCleanClosures',
-        'forbidDuplicateNames',
+        'forbidDuplicateNames'
       ];
 
       booleanProps.forEach(function(prop) {
@@ -11041,5 +11041,5 @@ getJasmineRequireObj().UserContext = function(j$) {
 };
 
 getJasmineRequireObj().version = function() {
-  return '5.4.0';
+  return '5.5.0';
 };
diff --git a/package.json b/package.json
index 8508f171..174d6fdb 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "jasmine-core",
   "license": "MIT",
-  "version": "5.4.0",
+  "version": "5.5.0",
   "repository": {
     "type": "git",
     "url": "https://github.com/jasmine/jasmine.git"
diff --git a/release_notes/5.5.0.md b/release_notes/5.5.0.md
new file mode 100644
index 00000000..2cfe42be
--- /dev/null
+++ b/release_notes/5.5.0.md
@@ -0,0 +1,34 @@
+# Jasmine Core 5.5.0 Release Notes
+
+## Changes
+
+* Optionally enforce uniqueness of spec and suite names
+
+  This is off by default for backwards compatibility but can be enabled
+  by setting the `forbidDuplicateNames` env config property to true.
+  Fixes [#1633](https://github.com/jasmine/jasmine/issues/1633).
+
+* Include property value mismatches in diffs even when there are missing or 
+  extra properties
+
+## Supported environments
+
+This version has been tested in the following environments.
+
+| Environment       | Supported versions      |
+|-------------------|-------------------------|
+| Node              | 18, 20, 22              |
+| Safari            | 15-17                   |
+| Chrome            | 131*                    |
+| Firefox           | 102**, 115**, 128, 132* |
+| Edge              | 131*                    |
+
+\* Evergreen browser. Each version of Jasmine is tested against the latest
+version available at release time.<br>
+\** Environments that are past end of life are supported on a best-effort basis.
+They may be dropped in a future minor release of Jasmine if continued support
+becomes impractical.
+
+------
+
+_Release Notes generated with _[Anchorman](http://github.com/infews/anchorman)_