diff --git a/package.json b/package.json
index dc387077b..de320827d 100644
--- a/package.json
+++ b/package.json
@@ -77,7 +77,7 @@
     "jest-fetch-mock": "^1.6.5",
     "lint-staged": "^7.2.2",
     "node-sass": "^4.9.3",
-    "preact-compat": "^3.18.3",
+    "preact-compat": "^3.18.4",
     "preact-render-spy": "^1.3.0",
     "preact-render-to-json": "^3.6.6",
     "prettier": "^1.11.1",
diff --git a/yarn.lock b/yarn.lock
index 6b775e843..ee3db410f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4188,12 +4188,6 @@ from2@^2.1.0:
     inherits "^2.0.1"
     readable-stream "^2.0.0"
 
-fs-access@^1.0.0:
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/fs-access/-/fs-access-1.0.1.tgz#d6a87f262271cefebec30c553407fb995da8777a"
-  dependencies:
-    null-check "^1.0.0"
-
 fs-extra@^0.30.0:
   version "0.30.0"
   resolved "https://registry.yarnpkg.com/fs-extra/-/fs-extra-0.30.0.tgz#f233ffcc08d4da7d432daa449776989db1df93f0"
@@ -5835,13 +5829,6 @@ jsx-ast-utils@^2.0.1:
   dependencies:
     array-includes "^3.0.3"
 
-karma-chrome-launcher@^2.2.0:
-  version "2.2.0"
-  resolved "https://registry.yarnpkg.com/karma-chrome-launcher/-/karma-chrome-launcher-2.2.0.tgz#cf1b9d07136cc18fe239327d24654c3dbc368acf"
-  dependencies:
-    fs-access "^1.0.0"
-    which "^1.2.1"
-
 keycode@^2.1.9:
   version "2.2.0"
   resolved "https://registry.yarnpkg.com/keycode/-/keycode-2.2.0.tgz#3d0af56dc7b8b8e5cba8d0a97f107204eec22b04"
@@ -6822,10 +6809,6 @@ nth-check@~1.0.1:
   dependencies:
     boolbase "~1.0.0"
 
-null-check@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/null-check/-/null-check-1.0.0.tgz#977dffd7176012b9ec30d2a39db5cf72a0439edd"
-
 num2fraction@^1.2.2:
   version "1.2.2"
   resolved "https://registry.yarnpkg.com/num2fraction/-/num2fraction-1.2.2.tgz#6f682b6a027a4e9ddfa4564cd2589d1d4e669ede"
@@ -7797,12 +7780,11 @@ postcss@^6.0.17:
     source-map "^0.6.1"
     supports-color "^5.3.0"
 
-preact-compat@^3.18.3:
-  version "3.18.3"
-  resolved "https://registry.yarnpkg.com/preact-compat/-/preact-compat-3.18.3.tgz#657582d552ae3f1a4e56ee82f13a75da91d445da"
+preact-compat@^3.18.4:
+  version "3.18.4"
+  resolved "https://registry.yarnpkg.com/preact-compat/-/preact-compat-3.18.4.tgz#fbe76ddd30356c68e3ccde608107104946f2cf8d"
   dependencies:
     immutability-helper "^2.7.1"
-    karma-chrome-launcher "^2.2.0"
     preact-render-to-string "^3.8.2"
     preact-transition-group "^1.1.1"
     prop-types "^15.6.2"
@@ -10146,7 +10128,7 @@ which@1, which@^1.2.10, which@^1.2.12, which@^1.2.9, which@^1.3.0:
   dependencies:
     isexe "^2.0.0"
 
-which@^1.2.1, which@^1.2.14:
+which@^1.2.14:
   version "1.3.1"
   resolved "https://registry.yarnpkg.com/which/-/which-1.3.1.tgz#a45043d54f5805316da8d62f9f50918d3da70b0a"
   dependencies: