diff --git a/package.json b/package.json
index c8e5dbb..89ce09c 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "private": true,
   "dependencies": {
     "highlight.js": "^9.13.1",
-    "prismjs": "^1.15.0",
+    "prismjs": "^1.21.0",
     "react": "^16.7.0-alpha.2",
     "react-dom": "^16.7.0-alpha.2",
     "react-icons": "^3.3.0",
diff --git a/yarn.lock b/yarn.lock
index 7e6ed22..f30cfc5 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7867,10 +7867,10 @@ pretty-format@^23.6.0:
     ansi-regex "^3.0.0"
     ansi-styles "^3.2.0"
 
-prismjs@^1.15.0:
-  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"