diff --git a/Gemfile b/Gemfile
index 34e2235..d2eb302 100644
--- a/Gemfile
+++ b/Gemfile
@@ -9,7 +9,7 @@ gem "factory_bot", "~> 6.3.0"
 gem "irb"
 gem "minitest", "~> 5.11"
 gem "minitest-snapshots", "~> 1.1"
-gem "mocha", "~> 2.4"
+gem "mocha", "~> 3.0"
 gem "observer"
 gem "openssl"
 gem "rake", "~> 13.0"