diff --git a/css/package.json b/css/package.json
index 953180cb..9eeefa72 100644
--- a/css/package.json
+++ b/css/package.json
@@ -31,6 +31,6 @@
     "webpack": "^4.16.1",
     "webpack-cli": "^3.3.0",
     "webpack-merge": "^4.1.3",
-    "yarn": "^1.7.0"
+    "yarn": "^1.22.0"
   }
 }
diff --git a/css/yarn.lock b/css/yarn.lock
index 9b4742e2..49c310ec 100644
--- a/css/yarn.lock
+++ b/css/yarn.lock
@@ -4343,7 +4343,7 @@ yargs@~1.2.6:
   dependencies:
     minimist "^0.1.0"
 
-yarn@^1.7.0:
-  version "1.15.2"
-  resolved "https://registry.npmjs.org/yarn/-/yarn-1.15.2.tgz"
-  integrity sha512-DhqaGe2FcYKduO42d2hByXk7y8k2k42H3uzYdWBMTvcNcgWKx7xCkJWsVAQikXvaEQN2GyJNrz8CboqUmaBRrw==
+yarn@^1.22.0:
+  version "1.22.0"
+  resolved "https://registry.yarnpkg.com/yarn/-/yarn-1.22.0.tgz#acf82906e36bcccd1ccab1cfb73b87509667c881"
+  integrity sha512-KMHP/Jq53jZKTY9iTUt3dIVl/be6UPs2INo96+BnZHLKxYNTfwMmlgHTaMWyGZoO74RI4AIFvnWhYrXq2USJkg==