diff --git a/yarn.lock b/yarn.lock
index 1b8bec0..82409af 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1409,10 +1409,8 @@ typescript@^3.1.0-dev.20180721:
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-3.1.0-dev.20180721.tgz#690467dccdf00c2910611ce3eb8efcffd5f43dbd"
 
 undefsafe@^2.0.2:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/undefsafe/-/undefsafe-2.0.2.tgz#225f6b9e0337663e0d8e7cfd686fc2836ccace76"
-  dependencies:
-    debug "^2.2.0"
+  version "2.0.5"
+  resolved "https://registry.yarnpkg.com/undefsafe/-/undefsafe-2.0.5.tgz#38733b9327bdcd226db889fb723a6efd162e6e2c"
 
 union-value@^1.0.0:
   version "1.0.0"