diff --git a/package.json b/package.json
index ebea433..3a3b02d 100644
--- a/package.json
+++ b/package.json
@@ -34,7 +34,7 @@
     "material-ui": "^0.20.2",
     "moment": "^2.24.0",
     "prettier": "^1.18.2",
-    "prismjs": "^1.17.1",
+    "prismjs": "^1.21.0",
     "react": "^16.9.0",
     "react-dom": "^16.9.0",
     "react-easy-print": "^0.6.0",
diff --git a/yarn.lock b/yarn.lock
index 61a4b5e..5385140 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -10873,10 +10873,10 @@ pretty-format@^24.9.0:
     ansi-styles "^3.2.0"
     react-is "^16.8.4"
 
-prismjs@^1.17.1:
-  version "1.17.1"
-  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.17.1.tgz#e669fcbd4cdd873c35102881c33b14d0d68519be"
-  integrity sha512-PrEDJAFdUGbOP6xK/UsfkC5ghJsPJviKgnQOoxaDbBjwc8op68Quupwt1DeAFoG8GImPhiKXAvvsH7wDSLsu1Q==
+prismjs@^1.21.0:
+  version "1.21.0"
+  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.21.0.tgz#36c086ec36b45319ec4218ee164c110f9fc015a3"
+  integrity sha512-uGdSIu1nk3kej2iZsLyDoJ7e9bnPzIgY0naW/HdknGj61zScaprVEVGHrPoXqI+M9sP0NDnTK2jpkvmldpuqDw==
   optionalDependencies:
     clipboard "^2.0.0"