diff --git a/.changeset/renovate-c30c1cd.md b/.changeset/renovate-c30c1cd.md
new file mode 100644
index 0000000000..07d65b3e0c
--- /dev/null
+++ b/.changeset/renovate-c30c1cd.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-adr-backend': patch
+---
+
+Updated dependency `@types/marked` to `^5.0.0`.
diff --git a/plugins/adr-backend/package.json b/plugins/adr-backend/package.json
index 8c1a7d4714..51051e7bbc 100644
--- a/plugins/adr-backend/package.json
+++ b/plugins/adr-backend/package.json
@@ -48,7 +48,7 @@
   },
   "devDependencies": {
     "@backstage/cli": "workspace:^",
-    "@types/marked": "^4.0.0",
+    "@types/marked": "^5.0.0",
     "@types/supertest": "^2.0.8",
     "msw": "^1.0.0",
     "supertest": "^6.1.3"
diff --git a/yarn.lock b/yarn.lock
index 0e715017b0..a6c0a65bd6 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4529,7 +4529,7 @@ __metadata:
     "@backstage/plugin-adr-common": "workspace:^"
     "@backstage/plugin-search-common": "workspace:^"
     "@types/express": ^4.17.6
-    "@types/marked": ^4.0.0
+    "@types/marked": ^5.0.0
     "@types/supertest": ^2.0.8
     express: ^4.17.1
     express-promise-router: ^4.1.0
@@ -19154,10 +19154,10 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/marked@npm:^4.0.0":
-  version: 4.3.2
-  resolution: "@types/marked@npm:4.3.2"
-  checksum: c1107079d6c368dd60a668a41aa2101d006cad404b6eb4af6723d419dc869b278928fb769825f11d0d311a8cf437428992729c8a47253b6a3894a6326b1ee4d9
+"@types/marked@npm:^5.0.0":
+  version: 5.0.2
+  resolution: "@types/marked@npm:5.0.2"
+  checksum: 2875618970bd5aaba472e313c799bbe241fe9e31d1e79782841a0cc04e08ab2a98653166f1fb99bf8bcf140d3878c3ab960a12aa8f0fb949d8277e8a01d3411b
   languageName: node
   linkType: hard