diff --git a/buildpacks/buildpack-multi/tests/multi/Gemfile.lock b/buildpacks/buildpack-multi/tests/multi/Gemfile.lock
index 96ff9245..718ebb50 100644
--- a/buildpacks/buildpack-multi/tests/multi/Gemfile.lock
+++ b/buildpacks/buildpack-multi/tests/multi/Gemfile.lock
@@ -4,7 +4,7 @@ GEM
     base64 (0.2.0)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
-    rack (3.1.7)
+    rack (3.1.8)
     rack-protection (4.0.0)
       base64 (>= 0.1.0)
       rack (>= 3.0.0, < 4)