diff --git a/yarn.lock b/yarn.lock
index 6fc7599..39a3e56 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1321,15 +1321,6 @@ cli-width@^2.0.0:
   resolved "https://registry.npmjs.org/cli-width/-/cli-width-2.1.0.tgz#b234ca209b29ef66fc518d9b98d5847b00edf00a"
   integrity sha1-sjTKIJsp72b8UY2bmNWEewDt8Ao=
 
-clipboard@^1.5.5:
-  version "1.7.1"
-  resolved "https://registry.npmjs.org/clipboard/-/clipboard-1.7.1.tgz#360d6d6946e99a7a1fef395e42ba92b5e9b5a16b"
-  integrity sha1-Ng1taUbpmnof7zleQrqStem1oWs=
-  dependencies:
-    good-listener "^1.2.2"
-    select "^1.1.2"
-    tiny-emitter "^2.0.0"
-
 clone@^1.0.2:
   version "1.0.2"
   resolved "https://registry.npmjs.org/clone/-/clone-1.0.2.tgz#260b7a99ebb1edfe247538175f783243cb19d149"
@@ -1752,11 +1743,6 @@ del@^2.0.2:
     pinkie-promise "^2.0.0"
     rimraf "^2.2.8"
 
-delegate@^3.1.2:
-  version "3.1.3"
-  resolved "https://registry.npmjs.org/delegate/-/delegate-3.1.3.tgz#9a8251a777d7025faa55737bc3b071742127a9fd"
-  integrity sha1-moJRp3fXAl+qVXN7w7BxdCEnqf0=
-
 detect-indent@^5.0.0:
   version "5.0.0"
   resolved "https://registry.npmjs.org/detect-indent/-/detect-indent-5.0.0.tgz#3871cc0a6a002e8c3e5b3cf7f336264675f06b9d"
@@ -2446,13 +2432,6 @@ globby@^6.0.0:
     pify "^2.0.0"
     pinkie-promise "^2.0.0"
 
-good-listener@^1.2.2:
-  version "1.2.2"
-  resolved "https://registry.npmjs.org/good-listener/-/good-listener-1.2.2.tgz#d53b30cdf9313dffb7dc9a0d477096aa6d145c50"
-  integrity sha1-1TswzfkxPf+33JoNR3CWqm0UXFA=
-  dependencies:
-    delegate "^3.1.2"
-
 got@^6.7.1:
   version "6.7.1"
   resolved "https://registry.npmjs.org/got/-/got-6.7.1.tgz#240cd05785a9a18e561dc1b44b41c763ef1e8db0"
@@ -4057,11 +4036,9 @@ prettier@^1.2.2:
   integrity sha512-f55mvineQ5yc36cLX4n4RWP6JH6MLcfi5f9MVsjpfBs4MVSG2GYT4v6cukzmvkIOvmNOdCZfDSMY3hQcMcDQbQ==
 
 prismjs@^1.6.0:
-  version "1.6.0"
-  resolved "https://registry.npmjs.org/prismjs/-/prismjs-1.6.0.tgz#118d95fb7a66dba2272e343b345f5236659db365"
-  integrity sha1-EY2V+3pm26InLjQ7NF9SNmWds2U=
-  optionalDependencies:
-    clipboard "^1.5.5"
+  version "1.24.0"
+  resolved "https://registry.yarnpkg.com/prismjs/-/prismjs-1.24.0.tgz#0409c30068a6c52c89ef7f1089b3ca4de56be2ac"
+  integrity sha512-SqV5GRsNqnzCL8k5dfAjCNhUrF3pR0A9lTDSCUZeh/LIshheXJEaP0hwLz2t4XHivd2J/v2HR+gRnigzeKe3cQ==
 
 private@^0.1.8:
   version "0.1.8"
@@ -4523,11 +4500,6 @@ sax@~1.2.4:
   resolved "https://registry.yarnpkg.com/sax/-/sax-1.2.4.tgz#2816234e2378bddc4e5354fab5caa895df7100d9"
   integrity sha512-NqVDv9TpANUjFm0N8uM5GxL36UgKi9/atZw+x7YFnQ8ckwFGKrl4xX4yWtrey3UJm5nP1kUbnYgLopqWNSRhWw==
 
-select@^1.1.2:
-  version "1.1.2"
-  resolved "https://registry.npmjs.org/select/-/select-1.1.2.tgz#0e7350acdec80b1108528786ec1d4418d11b396d"
-  integrity sha1-DnNQrN7ICxEIUoeG7B1EGNEbOW0=
-
 semver-diff@^2.0.0:
   version "2.1.0"
   resolved "https://registry.npmjs.org/semver-diff/-/semver-diff-2.1.0.tgz#4bbb8437c8d37e4b0cf1a68fd726ec6d645d6d36"
@@ -4885,11 +4857,6 @@ timsort@^0.3.0:
   resolved "https://registry.yarnpkg.com/timsort/-/timsort-0.3.0.tgz#405411a8e7e6339fe64db9a234de11dc31e02bd4"
   integrity sha1-QFQRqOfmM5/mTbmiNN4R3DHgK9Q=
 
-tiny-emitter@^2.0.0:
-  version "2.0.0"
-  resolved "https://registry.npmjs.org/tiny-emitter/-/tiny-emitter-2.0.0.tgz#bad327adb1804b42a231afa741532bd884cd09ad"
-  integrity sha1-utMnrbGAS0KiMa+nQVMr2ITNCa0=
-
 to-fast-properties@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/to-fast-properties/-/to-fast-properties-2.0.0.tgz#dc5e698cbd079265bc73e0377681a4e4e83f616e"