diff --git a/package.json b/package.json
index 59d158ab..d09301ac 100644
--- a/package.json
+++ b/package.json
@@ -7,7 +7,7 @@
   "devDependencies": {
     "docsify-server-renderer": "4.7.1",
     "marked": "^0.5.0",
-    "prismjs": "^1.15.0",
+    "prismjs": "^1.21.0",
     "uglify-js": "^3.8.1",
     "uglifycss": "0.0.29"
   },
diff --git a/yarn.lock b/yarn.lock
index eb842ee7..4392abd2 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -81,10 +81,10 @@ node-fetch@^1.7.0:
     encoding "^0.1.11"
     is-stream "^1.0.1"
 
-prismjs@^1.15.0:
-  version "1.20.0"
-  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.20.0.tgz#9b685fc480a3514ee7198eac6a3bf5024319ff03"
-  integrity sha512-AEDjSrVNkynnw6A+B1DsFkd6AVdTnp+/WoUixFRULlCLZVRZlVQMVWio/16jv7G1FscUxQxOQhWwApgbnxr6kQ==
+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"