diff --git a/example/signapp/yarn.lock b/example/signapp/yarn.lock
index 2d06c61..32c0778 100644
--- a/example/signapp/yarn.lock
+++ b/example/signapp/yarn.lock
@@ -5271,16 +5271,16 @@ scheduler@^0.23.0:
     loose-envify "^1.1.0"
 
 semver@^5.5.0, semver@^5.6.0:
-  version "5.7.1"
-  resolved "https://registry.npmmirror.com/semver/-/semver-5.7.1.tgz#a954f931aeba508d307bbf069eff0c01c96116f7"
+  version "5.7.2"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-5.7.2.tgz#48d55db737c3287cd4835e17fa13feace1c41ef8"
 
 semver@^6.0.0, semver@^6.1.1, semver@^6.1.2, semver@^6.3.0:
-  version "6.3.0"
-  resolved "https://registry.npmmirror.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
+  version "6.3.1"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.1.tgz#556d2ef8689146e46dcea4bfdd095f3434dffcb4"
 
 semver@^7.3.5, semver@^7.3.7:
-  version "7.3.8"
-  resolved "https://registry.npmmirror.com/semver/-/semver-7.3.8.tgz#07a78feafb3f7b32347d725e33de7e2a2df67798"
+  version "7.5.4"
+  resolved "https://registry.yarnpkg.com/semver/-/semver-7.5.4.tgz#483986ec4ed38e1c6c48c34894a9182dbff68a6e"
   dependencies:
     lru-cache "^6.0.0"