diff --git a/Gemfile.lock b/Gemfile.lock
index 3a15a5c5..a7453fbc 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -37,7 +37,7 @@ GEM
     bigdecimal (4.0.1)
     cgi (0.5.1)
     coderay (1.1.3)
-    concurrent-ruby (1.3.5)
+    concurrent-ruby (1.3.7)
     connection_pool (2.5.4)
     crack (1.0.1)
       bigdecimal