diff --git a/Gemfile.lock b/Gemfile.lock
index 6e09ed5..33ed3ef 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -19,7 +19,7 @@ GEM
     base64 (0.2.0)
     benchmark-ips (2.13.0)
     bigdecimal (3.1.8)
-    concurrent-ruby (1.3.1)
+    concurrent-ruby (1.3.7)
     connection_pool (2.4.1)
     drb (2.2.1)
     i18n (1.14.5)