diff --git a/package.json b/package.json
old mode 100755
new mode 100644
index c11a9da..7698f46
--- a/package.json
+++ b/package.json
@@ -22,7 +22,7 @@
     "lodash": "^4.17.15",
     "marked": "^0.7.0",
     "nprogress": "^0.2.0",
-    "prismjs": "^1.15.0",
+    "prismjs": "^1.21.0",
     "resolve-url-loader": "^3.1.0",
     "sass": "^1.23.0",
     "sass-loader": "^8.0.0",
diff --git a/yarn.lock b/yarn.lock
index d888358..bb2a12a 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -5545,10 +5545,10 @@ prettier@^1.18.2:
   resolved "https://registry.yarnpkg.com/prettier/-/prettier-1.19.1.tgz#f7d7f5ff8a9cd872a7be4ca142095956a60797cb"
   integrity sha512-s7PoyDv/II1ObgQunCbB9PdLmUcBZcnWOcxDh7O0N/UwDEsHyqkW+Qh28jW+mVuCdx7gLB0BotYI1Y6uI9iyew==
 
-prismjs@^1.15.0:
-  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"