diff --git a/4.0/test/rack-test-app/Gemfile.lock b/4.0/test/rack-test-app/Gemfile.lock
index 47d6d53e..561ecfd2 100644
--- a/4.0/test/rack-test-app/Gemfile.lock
+++ b/4.0/test/rack-test-app/Gemfile.lock
@@ -3,19 +3,26 @@ GEM
   specs:
     base64 (0.3.0)
     logger (1.7.0)
-    mustermann (1.1.1)
+    mustermann (3.0.4)
       ruby2_keywords (~> 0.0.1)
     ostruct (0.6.3)
-    rack (2.2.3)
-    rack-protection (2.1.0)
-      rack
-    ruby2_keywords (0.0.4)
-    sinatra (2.1.0)
-      mustermann (~> 1.0)
-      rack (~> 2.2)
-      rack-protection (= 2.1.0)
+    rack (3.2.5)
+    rack-protection (4.2.0)
+      base64 (>= 0.1.0)
+      logger (>= 1.6.0)
+      rack (>= 3.0.0, < 4)
+    rack-session (2.1.1)
+      base64 (>= 0.1.0)
+      rack (>= 3.0.0)
+    ruby2_keywords (0.0.5)
+    sinatra (4.2.0)
+      logger (>= 1.6.0)
+      mustermann (~> 3.0)
+      rack (>= 3.0.0, < 4)
+      rack-protection (= 4.2.0)
+      rack-session (>= 2.0.0, < 3)
       tilt (~> 2.0)
-    tilt (2.0.10)
+    tilt (2.7.0)
     webrick (1.7.0)
 
 PLATFORMS