diff --git a/Gemfile.lock b/Gemfile.lock
index 10fae61..66ee7f0 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -16,7 +16,7 @@ GEM
       thor (>= 0.14.0)
     ast (2.4.3)
     base64 (0.3.0)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     date (3.5.1)
     diff-lcs (1.6.2)
     docile (1.4.1)
@@ -150,7 +150,7 @@ CHECKSUMS
   appraisal (2.5.0) sha256=36989221be127913b0dba8d114da2001e6b2dceea7bd4951200eaba764eed3ce
   ast (2.4.3) sha256=954615157c1d6a382bc27d690d973195e79db7f55e9765ac7c481c60bdb4d383
   base64 (0.3.0) sha256=27337aeabad6ffae05c265c450490628ef3ebd4b67be58257393227588f5a97b
-  concurrent-ruby (1.3.6) sha256=6b56837e1e7e5292f9864f34b69c5a2cbc75c0cf5338f1ce9903d10fa762d5ab
+  concurrent-ruby (1.3.7) sha256=4412caec3a5ea2e5fdc52076724c071a81f2c0593d83b2ac8cbb8ca63b3151b0
   date (3.5.1) sha256=750d06384d7b9c15d562c76291407d89e368dda4d4fff957eb94962d325a0dc0
   diff-lcs (1.6.2) sha256=9ae0d2cba7d4df3075fe8cd8602a8604993efc0dfa934cff568969efb1909962
   docile (1.4.1) sha256=96159be799bfa73cdb721b840e9802126e4e03dfc26863db73647204c727f21e