diff --git a/Gemfile.lock b/Gemfile.lock
index 2cad8dd..2f6f9a1 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -36,7 +36,7 @@ GEM
     childprocess (5.1.0)
       logger (~> 1.5)
     coderay (1.1.3)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     diff-lcs (1.6.2)
     docile (1.4.1)