diff --git a/3.0/test/puma-test-app/Gemfile.lock b/3.0/test/puma-test-app/Gemfile.lock
index 052f5933..32eae163 100644
--- a/3.0/test/puma-test-app/Gemfile.lock
+++ b/3.0/test/puma-test-app/Gemfile.lock
@@ -6,7 +6,7 @@ GEM
     nio4r (2.5.7)
     puma (5.2.2)
       nio4r (~> 2.0)
-    rack (2.2.3)
+    rack (2.2.20)
     rack-protection (2.1.0)
       rack
     ruby2_keywords (0.0.4)