diff --git a/docs/Gemfile.lock b/docs/Gemfile.lock
index 8c87b55b..e0f57783 100644
--- a/docs/Gemfile.lock
+++ b/docs/Gemfile.lock
@@ -19,7 +19,7 @@ GEM
     base64 (0.3.0)
     bigdecimal (4.0.1)
     colorator (1.1.0)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     csv (3.3.5)
     diff-lcs (1.6.2)