diff --git a/Gemfile.lock b/Gemfile.lock
index 74c7611b..d342541b 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,7 +9,7 @@ GEM
     ast (2.4.2)
     benchmark-ips (2.9.2)
     docile (1.4.0)
-    minitest (5.14.4)
+    minitest (5.15.0)
     parser (3.0.3.2)
       ast (~> 2.4.1)
     rake (13.0.6)