diff --git a/Gemfile.lock b/Gemfile.lock
index d67a740b..b4080744 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -92,7 +92,7 @@ GEM
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
     coderay (1.1.3)
-    concurrent-ruby (1.3.5)
+    concurrent-ruby (1.3.7)
     connection_pool (2.5.4)
     crass (1.0.6)
     dark_finger (0.6.1)