diff --git a/cloud-sql/sqlserver/activerecord/Gemfile.lock b/cloud-sql/sqlserver/activerecord/Gemfile.lock
index 00d767b3c..ffb3319d1 100644
--- a/cloud-sql/sqlserver/activerecord/Gemfile.lock
+++ b/cloud-sql/sqlserver/activerecord/Gemfile.lock
@@ -81,7 +81,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.3.5)
+    concurrent-ruby (1.3.7)
     crass (1.0.6)
     date (3.3.4)
     diff-lcs (1.5.0)