diff --git a/lib/docs-components/package.json b/lib/docs-components/package.json
index 937439c9c..28ff86d30 100644
--- a/lib/docs-components/package.json
+++ b/lib/docs-components/package.json
@@ -38,7 +38,7 @@
   },
   "devDependencies": {
     "@types/prettier": "^2.7.3",
-    "@types/prismjs": "^1",
+    "@types/prismjs": "^1.26.5",
     "@types/react": "18.3.12",
     "@types/react-dom": "18.3.1",
     "typescript": "4.9.5"
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 4b607b68a..4e9cd64c0 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -1897,7 +1897,7 @@ importers:
       '@not-govuk/tabs-internal': workspace:^0.14.0
       '@storybook/react': 6.5.16
       '@types/prettier': ^2.7.3
-      '@types/prismjs': ^1
+      '@types/prismjs': ^1.26.5
       '@types/react': 18.3.12
       '@types/react-dom': 18.3.1
       prettier: ^2.8.8