diff --git a/Gemfile.lock b/Gemfile.lock
index 6541bd0..082273e 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -27,7 +27,7 @@ GEM
     colorator (1.1.0)
     compare-xml (0.66)
       nokogiri (~> 1.8)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     csv (3.3.5)
     date (3.5.1)
@@ -333,7 +333,7 @@ CHECKSUMS
   canon (0.1.3) sha256=e5c1a7a03195c72188bcf700022b1247eec80d5e91face3166d9005197a10deb
   colorator (1.1.0) sha256=e2f85daf57af47d740db2a32191d1bdfb0f6503a0dfbc8327d0c9154d5ddfc38
   compare-xml (0.66) sha256=e21aa5c0f69ef1177eced997c688fd4df989084e74a1b612257af32e1dd05319
-  concurrent-ruby (1.3.6) sha256=6b56837e1e7e5292f9864f34b69c5a2cbc75c0cf5338f1ce9903d10fa762d5ab
+  concurrent-ruby (1.3.7) sha256=4412caec3a5ea2e5fdc52076724c071a81f2c0593d83b2ac8cbb8ca63b3151b0
   connection_pool (3.0.2) sha256=33fff5ba71a12d2aa26cb72b1db8bba2a1a01823559fb01d29eb74c286e62e0a
   csv (3.3.5) sha256=6e5134ac3383ef728b7f02725d9872934f523cb40b961479f69cf3afa6c8e73f
   date (3.5.1) sha256=750d06384d7b9c15d562c76291407d89e368dda4d4fff957eb94962d325a0dc0