diff --git a/devtool/package.json b/devtool/package.json
index 19275f4e..9817e5c8 100644
--- a/devtool/package.json
+++ b/devtool/package.json
@@ -56,7 +56,7 @@
     "postcss-normalize": "8.0.1",
     "postcss-preset-env": "6.7.1",
     "postcss-safe-parser": "5.0.2",
-    "prismjs": "1.26.0",
+    "prismjs": "1.28.0",
     "prompts": "2.4.2",
     "react-app-polyfill": "2.0.0",
     "react-dev-utils": "11.0.4",
diff --git a/devtool/yarn.lock b/devtool/yarn.lock
index 86c6c7b8..89a6d0b2 100644
--- a/devtool/yarn.lock
+++ b/devtool/yarn.lock
@@ -9650,10 +9650,10 @@ pretty-format@^27.0.2, pretty-format@^27.5.1:
     ansi-styles "^5.0.0"
     react-is "^17.0.1"
 
-prismjs@1.26.0:
-  version "1.26.0"
-  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.26.0.tgz#16881b594828bb6b45296083a8cbab46b0accd47"
-  integrity sha512-HUoH9C5Z3jKkl3UunCyiD5jwk0+Hz0fIgQ2nbwU2Oo/ceuTAQAg+pPVnfdt2TJWRVLcxKh9iuoYDUSc8clb5UQ==
+prismjs@1.28.0:
+  version "1.28.0"
+  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.28.0.tgz#0d8f561fa0f7cf6ebca901747828b149147044b6"
+  integrity sha512-8aaXdYvl1F7iC7Xm1spqSaY/OJBpYW3v+KJ+F17iYxvdc8sfjW194COK5wVhMZX45tGteiBQgdvD/nhxcRwylw==
 
 process-nextick-args@~2.0.0:
   version "2.0.1"