diff --git a/package.json b/package.json
index 0519cb6..3771632 100644
--- a/package.json
+++ b/package.json
@@ -78,7 +78,7 @@
     "firebase": "7.2.0",
     "hammerjs": "2.0.8",
     "ngx-markdown": "8.2.1",
-    "prismjs": "1.17.1",
+    "prismjs": "1.21.0",
     "rxjs": "6.5.3",
     "tslib": "1.10.0",
     "ws": "7.1.2",