diff --git a/graphql-mock-cities/yarn.lock b/graphql-mock-cities/yarn.lock
index b6f3d73..6dd2846 100644
--- a/graphql-mock-cities/yarn.lock
+++ b/graphql-mock-cities/yarn.lock
@@ -3433,8 +3433,8 @@ semver-diff@^2.0.0:
     semver "^5.0.3"
 
 semver@^5.0.3, semver@^5.1.0, semver@^5.3.0, semver@^5.5.0:
-  version "5.5.0"
-  resolved "https://registry.yarnpkg.com/semver/-/semver-5.5.0.tgz#dc4bbc7a6ca9d916dee5d43516f0092b58f7b8ab"
+  version "5.7.2"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.2.tgz#48d55db737c3287cd4835e17fa13feace1c41ef8"
 
 send@0.17.2:
   version "0.17.2"