diff --git a/package.json b/package.json
index 6c1f31f..7d3c73c 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "gatsby-transformer-remark": "^2.6.21",
     "gatsby-transformer-sharp": "2.2.13",
     "katex": "0.11.0",
-    "prismjs": "1.21.0",
+    "prismjs": "1.23.0",
     "react": "16.9.0",
     "react-dom": "16.9.0",
     "react-helmet": "5.2.1",
diff --git a/yarn.lock b/yarn.lock
index 10fc0ff..13bdb26 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -11062,10 +11062,10 @@ pretty-error@^2.1.1:
     renderkid "^2.0.1"
     utila "~0.4"
 
-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==
+prismjs@1.23.0:
+  version "1.23.0"
+  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.23.0.tgz#d3b3967f7d72440690497652a9d40ff046067f33"
+  integrity sha512-c29LVsqOaLbBHuIbsTxaKENh1N2EQBOHaWv7gkHN4dgRbxSREqDnDbtFJYdpPauS4YCplMSNCABQ6Eeor69bAA==
   optionalDependencies:
     clipboard "^2.0.0"