diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3d772ca5..70562684 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,13 +1,16 @@
 # Monaco Editor Changelog
 
-## [0.55.0] (unreleased)
+## [0.55.0]
 
 ### Breaking Changes
-- Moves nested namespaces (`languages.css`, `languages.html`, `languages.json`, `languages.typescript`) to top level namespaces (`css`, `html`, `json`, `typescript`) to simplify the build process.
+- Moves nested namespaces (`languages.css`, `languages.html`, `languages.json`, `languages.typescript`) to top level namespaces (`css`, `html`, `json`, `typescript`) to simplify the build process and align with typescript recommendations.
 
 ### New Features
 - Adds native LSP support (see new `lsp` namespace).
 
+### Bug Fixes
+- Updates dompurify to 3.2.7
+
 ## [0.54.0]
 
 - Adds option `editor.mouseMiddleClickAction`
diff --git a/package-lock.json b/package-lock.json
index 461cb6ef..1e4da3de 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
 	"name": "monaco-editor",
-	"version": "0.54.0",
+	"version": "0.55.0",
 	"lockfileVersion": 2,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "monaco-editor",
-			"version": "0.54.0",
+			"version": "0.55.0",
 			"hasInstallScript": true,
 			"license": "MIT",
 			"devDependencies": {
@@ -30,7 +30,7 @@
 				"jsdom": "^19.0.0",
 				"jsonc-parser": "^3.0.0",
 				"mocha": "^11.7.4",
-				"monaco-editor-core": "^0.55.0-dev-20251008",
+				"monaco-editor-core": "^0.55.0-rc",
 				"parcel": "^2.7.0",
 				"pin-github-action": "^1.8.0",
 				"postcss-url": "^10.1.3",
@@ -4493,11 +4493,22 @@
 			}
 		},
 		"node_modules/dompurify": {
-			"version": "3.1.7",
-			"resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.1.7.tgz",
-			"integrity": "sha512-VaTstWtsneJY8xzy7DekmYWEOZcmzIe3Qb3zPd4STve1OBTa+e+WmS1ITQec1fZYXI3HCsOZZiSMpG6oxoWMWQ==",
+			"version": "3.2.7",
+			"resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.2.7.tgz",
+			"integrity": "sha512-WhL/YuveyGXJaerVlMYGWhvQswa7myDG17P7Vu65EWC05o8vfeNbvNf4d/BOvH99+ZW+LlQsc1GDKMa1vNK6dw==",
 			"dev": true,
-			"license": "(MPL-2.0 OR Apache-2.0)"
+			"license": "(MPL-2.0 OR Apache-2.0)",
+			"optionalDependencies": {
+				"@types/trusted-types": "^2.0.7"
+			}
+		},
+		"node_modules/dompurify/node_modules/@types/trusted-types": {
+			"version": "2.0.7",
+			"resolved": "https://registry.npmjs.org/@types/trusted-types/-/trusted-types-2.0.7.tgz",
+			"integrity": "sha512-ScaPdn1dQczgbl0QFTeTOmVHFULt394XJgOQNoyVhZ6r2vLnMLJfBPd53SB52T/3G36VI1/g2MZaX0cwDuXsfw==",
+			"dev": true,
+			"license": "MIT",
+			"optional": true
 		},
 		"node_modules/domutils": {
 			"version": "2.8.0",
@@ -6512,13 +6523,13 @@
 			}
 		},
 		"node_modules/monaco-editor-core": {
-			"version": "0.55.0-dev-20251009",
-			"resolved": "https://registry.npmjs.org/monaco-editor-core/-/monaco-editor-core-0.55.0-dev-20251009.tgz",
-			"integrity": "sha512-QyipMtg/vrAXaurn2BpAehWAKsMYlX1bfMxLBjGAI2DJJ/6isZ8+jpPcrOgIPa8Lu4AKrv4vQ0qYGtgSqp0R7Q==",
+			"version": "0.55.0-rc",
+			"resolved": "https://registry.npmjs.org/monaco-editor-core/-/monaco-editor-core-0.55.0-rc.tgz",
+			"integrity": "sha512-LZAAUGilhXX+u+JNxqBABDFyvIVjW6Gmn3EkP0ztdvNxvP6+voiRm2/ZMLokSUGrdOeCZXA2nM6w1xjKkrqNjQ==",
 			"dev": true,
 			"license": "MIT",
 			"dependencies": {
-				"dompurify": "3.1.7",
+				"dompurify": "3.2.7",
 				"marked": "14.0.0"
 			}
 		},
@@ -12091,10 +12102,22 @@
 			}
 		},
 		"dompurify": {
-			"version": "3.1.7",
-			"resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.1.7.tgz",
-			"integrity": "sha512-VaTstWtsneJY8xzy7DekmYWEOZcmzIe3Qb3zPd4STve1OBTa+e+WmS1ITQec1fZYXI3HCsOZZiSMpG6oxoWMWQ==",
-			"dev": true
+			"version": "3.2.7",
+			"resolved": "https://registry.npmjs.org/dompurify/-/dompurify-3.2.7.tgz",
+			"integrity": "sha512-WhL/YuveyGXJaerVlMYGWhvQswa7myDG17P7Vu65EWC05o8vfeNbvNf4d/BOvH99+ZW+LlQsc1GDKMa1vNK6dw==",
+			"dev": true,
+			"requires": {
+				"@types/trusted-types": "^2.0.7"
+			},
+			"dependencies": {
+				"@types/trusted-types": {
+					"version": "2.0.7",
+					"resolved": "https://registry.npmjs.org/@types/trusted-types/-/trusted-types-2.0.7.tgz",
+					"integrity": "sha512-ScaPdn1dQczgbl0QFTeTOmVHFULt394XJgOQNoyVhZ6r2vLnMLJfBPd53SB52T/3G36VI1/g2MZaX0cwDuXsfw==",
+					"dev": true,
+					"optional": true
+				}
+			}
 		},
 		"domutils": {
 			"version": "2.8.0",
@@ -13412,12 +13435,12 @@
 			}
 		},
 		"monaco-editor-core": {
-			"version": "0.55.0-dev-20251009",
-			"resolved": "https://registry.npmjs.org/monaco-editor-core/-/monaco-editor-core-0.55.0-dev-20251009.tgz",
-			"integrity": "sha512-QyipMtg/vrAXaurn2BpAehWAKsMYlX1bfMxLBjGAI2DJJ/6isZ8+jpPcrOgIPa8Lu4AKrv4vQ0qYGtgSqp0R7Q==",
+			"version": "0.55.0-rc",
+			"resolved": "https://registry.npmjs.org/monaco-editor-core/-/monaco-editor-core-0.55.0-rc.tgz",
+			"integrity": "sha512-LZAAUGilhXX+u+JNxqBABDFyvIVjW6Gmn3EkP0ztdvNxvP6+voiRm2/ZMLokSUGrdOeCZXA2nM6w1xjKkrqNjQ==",
 			"dev": true,
 			"requires": {
-				"dompurify": "3.1.7",
+				"dompurify": "3.2.7",
 				"marked": "14.0.0"
 			}
 		},
diff --git a/package.json b/package.json
index 4e7a1eb9..ac2a00cb 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
 	"name": "monaco-editor",
-	"version": "0.54.0",
-	"vscodeRef": "484fdf69b8509c1c9370d913b32e9f6d3a68cc99",
+	"version": "0.55.0",
+	"vscodeRef": "86f5a62f058e3905f74a9fa65d04b2f3b533408e",
 	"private": true,
 	"description": "A browser based code editor",
 	"homepage": "https://github.com/microsoft/monaco-editor",
@@ -69,7 +69,7 @@
 		"jsdom": "^19.0.0",
 		"jsonc-parser": "^3.0.0",
 		"mocha": "^11.7.4",
-		"monaco-editor-core": "^0.55.0-dev-20251008",
+		"monaco-editor-core": "^0.55.0-rc",
 		"parcel": "^2.7.0",
 		"pin-github-action": "^1.8.0",
 		"postcss-url": "^10.1.3",