diff --git a/Gemfile.lock b/Gemfile.lock
index 46a048c..78b7e12 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -46,7 +46,7 @@ GEM
     bcrypt_pbkdf (1.1.1)
     bigdecimal (3.3.1)
     builder (3.3.0)
-    concurrent-ruby (1.3.5)
+    concurrent-ruby (1.3.7)
     connection_pool (2.5.4)
     crass (1.0.6)
     date (3.5.0)