diff --git a/assets/dora/Gemfile.lock b/assets/dora/Gemfile.lock
index d6f454c04..00930ec0f 100644
--- a/assets/dora/Gemfile.lock
+++ b/assets/dora/Gemfile.lock
@@ -6,7 +6,7 @@ GEM
     json (2.7.1)
     mustermann (3.0.0)
       ruby2_keywords (~> 0.0.1)
-    rack (3.0.8)
+    rack (3.0.9.1)
     rack-protection (4.0.0)
       base64 (>= 0.1.0)
       rack (>= 3.0.0, < 4)
diff --git a/assets/dora/vendor/cache/rack-3.0.8.gem b/assets/dora/vendor/cache/rack-3.0.8.gem
deleted file mode 100644
index 4edcbc657..000000000
Binary files a/assets/dora/vendor/cache/rack-3.0.8.gem and /dev/null differ
diff --git a/assets/dora/vendor/cache/rack-3.0.9.1.gem b/assets/dora/vendor/cache/rack-3.0.9.1.gem
new file mode 100644
index 000000000..dcd522a4f
Binary files /dev/null and b/assets/dora/vendor/cache/rack-3.0.9.1.gem differ