diff --git a/package.json b/package.json
index 6d079a6..efdd5b0 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
     "optimize-css-assets-webpack-plugin": "^4.0.0",
     "portfinder": "^1.0.13",
     "postcss-loader": "^2.1.5",
-    "prismjs": "^1.13.0",
+    "prismjs": "^1.27.0",
     "register-service-worker": "^1.5.1",
     "semver": "^5.5.0",
     "stylus": "^0.54.5",
diff --git a/yarn.lock b/yarn.lock
index 5b23ba7..8d7b8e4 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1984,14 +1984,6 @@ cli-width@^2.0.0:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/cli-width/-/cli-width-2.2.0.tgz#ff19ede8a9a5e579324147b0c11f0fbcbabed639"
 
-clipboard@^2.0.0:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/clipboard/-/clipboard-2.0.1.tgz#a12481e1c13d8a50f5f036b0560fe5d16d74e46a"
-  dependencies:
-    good-listener "^1.2.2"
-    select "^1.1.2"
-    tiny-emitter "^2.0.0"
-
 clipboardy@^1.2.2:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/clipboardy/-/clipboardy-1.2.3.tgz#0526361bf78724c1f20be248d428e365433c07ef"
@@ -2745,10 +2737,6 @@ delayed-stream@~1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/delayed-stream/-/delayed-stream-1.0.0.tgz#df3ae199acadfb7d440aaae0b29e2272b24ec619"
 
-delegate@^3.1.2:
-  version "3.2.0"
-  resolved "https://registry.yarnpkg.com/delegate/-/delegate-3.2.0.tgz#b66b71c3158522e8ab5744f720d8ca0c2af59166"
-
 delegates@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/delegates/-/delegates-1.0.0.tgz#84c6e159b81904fdca59a0ef44cd870d31250f9a"
@@ -3755,12 +3743,6 @@ globby@^8.0.1:
     pify "^3.0.0"
     slash "^1.0.0"
 
-good-listener@^1.2.2:
-  version "1.2.2"
-  resolved "https://registry.yarnpkg.com/good-listener/-/good-listener-1.2.2.tgz#d53b30cdf9313dffb7dc9a0d477096aa6d145c50"
-  dependencies:
-    delegate "^3.1.2"
-
 got@^6.7.1:
   version "6.7.1"
   resolved "https://registry.yarnpkg.com/got/-/got-6.7.1.tgz#240cd05785a9a18e561dc1b44b41c763ef1e8db0"
@@ -6076,7 +6058,7 @@ once@^1.3.0, once@^1.3.1, once@^1.4.0:
 
 onetime@^1.0.0:
   version "1.1.0"
-  resolved "http://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz#a1f7838f8314c516f05ecefcbc4ccfe04b4ed789"
+  resolved "https://registry.npmjs.org/onetime/-/onetime-1.1.0.tgz#a1f7838f8314c516f05ecefcbc4ccfe04b4ed789"
 
 onetime@^2.0.0:
   version "2.0.1"
@@ -6692,11 +6674,10 @@ pretty@2.0.0:
     extend-shallow "^2.0.1"
     js-beautify "^1.6.12"
 
-prismjs@^1.13.0:
-  version "1.15.0"
-  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.15.0.tgz#8801d332e472091ba8def94976c8877ad60398d9"
-  optionalDependencies:
-    clipboard "^2.0.0"
+prismjs@^1.27.0:
+  version "1.27.0"
+  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.27.0.tgz#bb6ee3138a0b438a3653dd4d6ce0cc6510a45057"
+  integrity sha512-t13BGPUlFDR7wRB5kQDG4jjl7XeuH6jbJGt11JHPL96qwsEHNX2+68tFXqc1/k+/jALsbSWJKUOT/hcYAZ5LkA==
 
 private@^0.1.6, private@^0.1.8:
   version "0.1.8"
@@ -7285,10 +7266,6 @@ section-matter@^1.0.0:
     extend-shallow "^2.0.1"
     kind-of "^6.0.0"
 
-select@^1.1.2:
-  version "1.1.2"
-  resolved "https://registry.yarnpkg.com/select/-/select-1.1.2.tgz#0e7350acdec80b1108528786ec1d4418d11b396d"
-
 semver-compare@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/semver-compare/-/semver-compare-1.0.0.tgz#0dee216a1c941ab37e9efb1788f6afc5ff5537fc"
@@ -7859,10 +7836,6 @@ timers-browserify@^2.0.4:
   dependencies:
     setimmediate "^1.0.4"
 
-tiny-emitter@^2.0.0:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/tiny-emitter/-/tiny-emitter-2.0.2.tgz#82d27468aca5ade8e5fd1e6d22b57dd43ebdfb7c"
-
 tmp@^0.0.33:
   version "0.0.33"
   resolved "https://registry.yarnpkg.com/tmp/-/tmp-0.0.33.tgz#6d34335889768d21b2bcda0aa277ced3b1bfadf9"