diff --git a/package.json b/package.json
index cdbf543..0c1c81e 100644
--- a/package.json
+++ b/package.json
@@ -139,7 +139,7 @@
     "postcss-preset-env": "6.5.0",
     "postcss-safe-parser": "4.0.1",
     "prettier": "^1.16.4",
-    "prismjs": "^1.15.0",
+    "prismjs": "^1.21.0",
     "prop-types": "^15.7.2",
     "react": "^16.8.3",
     "react-app-polyfill": "^0.2.1",
diff --git a/yarn.lock b/yarn.lock
index 4b8c1f5..25d8192 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -15702,14 +15702,14 @@ prismjs@1.6:
   optionalDependencies:
     clipboard "^1.5.5"
 
-prismjs@^1.15.0:
-  version "1.16.0"
-  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.16.0.tgz#406eb2c8aacb0f5f0f1167930cb83835d10a4308"
-  integrity sha512-OA4MKxjFZHSvZcisLGe14THYsug/nF6O1f0pAJc0KN0wTyAcLqmsbE+lTGKSpyh+9pEW57+k6pg2AfYR+coyHA==
+prismjs@^1.21.0, prismjs@^1.8.4:
+  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"
 
-prismjs@^1.8.4, prismjs@~1.17.0:
+prismjs@~1.17.0:
   version "1.17.1"
   resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.17.1.tgz#e669fcbd4cdd873c35102881c33b14d0d68519be"
   integrity sha512-PrEDJAFdUGbOP6xK/UsfkC5ghJsPJviKgnQOoxaDbBjwc8op68Quupwt1DeAFoG8GImPhiKXAvvsH7wDSLsu1Q==