diff --git a/Gemfile.lock b/Gemfile.lock
index 5fe87b7f..2e567d08 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -12,7 +12,7 @@ GEM
     coderay (1.1.3)
     diffy (3.4.0)
     method_source (1.0.0)
-    minitest (5.15.0)
+    minitest (5.20.0)
     parallel (1.21.0)
     parser (3.1.0.0)
       ast (~> 2.4.1)