diff --git a/package.json b/package.json
index efc1b8b..c63ad2f 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "jest": "^20.0.4",
     "normalize.css": "7.0.0",
     "preact": "8.5.2",
-    "prismjs": "1.18.0",
+    "prismjs": "1.23.0",
     "style-loader": "0.18.2",
     "webpack": "3.4.1"
   },
diff --git a/yarn.lock b/yarn.lock
index 6a9ea74..e54e8c3 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3544,10 +3544,10 @@ pretty-format@^20.0.3:
     ansi-regex "^2.1.1"
     ansi-styles "^3.0.0"
 
-prismjs@1.18.0:
-  version "1.18.0"
-  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.18.0.tgz#8f04dd47fa232cbd27d1ca969107580ff43f06e4"
-  integrity sha512-N0r3i/Cto516V8+GKKamhsPVZSFcO0TMUBtIDW6uq6BVqoC3FNtZVZ+cmH16N2XtGQlgRN+sFUTjOdCsEP51qw==
+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"