diff --git a/package.json b/package.json
index 664d3c0..65d0cda 100644
--- a/package.json
+++ b/package.json
@@ -55,7 +55,7 @@
     "markdown-loader": "^5.1.0",
     "normalize.css": "^8.0.1",
     "prettier": "^1.19.1",
-    "prismjs": "^1.19.0",
+    "prismjs": "^1.21.0",
     "vue": "^2.6.11",
     "vue-loader": "^15.9.0",
     "vue-router": "^3.1.6",
diff --git a/yarn.lock b/yarn.lock
index 62069b8..2137b1e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9526,10 +9526,10 @@ pretty-hrtime@^1.0.0:
   resolved "https://registry.yarnpkg.com/pretty-hrtime/-/pretty-hrtime-1.0.3.tgz#b7e3ea42435a4c9b2759d99e0f201eb195802ee1"
   integrity sha1-t+PqQkNaTJsnWdmeDyAesZWALuE=
 
-prismjs@^1.19.0:
-  version "1.19.0"
-  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.19.0.tgz#713afbd45c3baca4b321569f2df39e17e729d4dc"
-  integrity sha512-IVFtbW9mCWm9eOIaEkNyo2Vl4NnEifis2GQ7/MLRG5TQe6t+4Sj9J5QWI9i3v+SS43uZBlCAOn+zYTVYQcPXJw==
+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"