diff --git a/tools/package-lock.json b/tools/package-lock.json
index 46b78d5..f5e01fe 100644
--- a/tools/package-lock.json
+++ b/tools/package-lock.json
@@ -637,9 +637,9 @@
       "integrity": "sha1-F0uSaHNVNP+8es5r9TpanhtcX18="
     },
     "prismjs": {
-      "version": "1.21.0",
-      "resolved": "https://registry.npmjs.org/prismjs/-/prismjs-1.21.0.tgz",
-      "integrity": "sha512-uGdSIu1nk3kej2iZsLyDoJ7e9bnPzIgY0naW/HdknGj61zScaprVEVGHrPoXqI+M9sP0NDnTK2jpkvmldpuqDw==",
+      "version": "1.23.0",
+      "resolved": "https://registry.npmjs.org/prismjs/-/prismjs-1.23.0.tgz",
+      "integrity": "sha512-c29LVsqOaLbBHuIbsTxaKENh1N2EQBOHaWv7gkHN4dgRbxSREqDnDbtFJYdpPauS4YCplMSNCABQ6Eeor69bAA==",
       "requires": {
         "clipboard": "^2.0.0"
       }
diff --git a/tools/package.json b/tools/package.json
index ab0dd31..5c2e2d9 100644
--- a/tools/package.json
+++ b/tools/package.json
@@ -19,6 +19,6 @@
     "koa-mount": "^3.0.0",
     "koa-static": "^4.0.2",
     "marked": "^0.3.18",
-    "prismjs": "^1.21.0"
+    "prismjs": "^1.23.0"
   }
 }