diff --git a/Gemfile.lock b/Gemfile.lock
index d1828aa36..79a458d1b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -29,7 +29,7 @@ GEM
     base64 (0.2.0)
     benchmark-ips (2.13.0)
     bigdecimal (3.1.8)
-    concurrent-ruby (1.3.1)
+    concurrent-ruby (1.3.3)
     connection_pool (2.4.1)
     csv (3.3.0)
     dbm (1.1.0)