diff --git a/stack.yaml b/stack.yaml
index 4a42c7424..466d12f62 100644
--- a/stack.yaml
+++ b/stack.yaml
@@ -67,7 +67,7 @@ extra-deps:
     commit: 843683d024f767de236f74d24a3348f69181a720
 
   - git: https://gitlab.ifi.lmu.de/uni2work/haskell/yesod.git
-    commit: 4b71808e48e7844d78c07a9df0d548f8edaaa5c0 # <- references debug with traceStack; master ref: cb75191e0c5490246ae2cbcc2a00e7985cf2aadb
+    commit: fff180821c18db01a2eef7a830c94c26c3b05011 # <- references debug with traceStack; master ref: cb75191e0c5490246ae2cbcc2a00e7985cf2aadb
     subdirs:
       - yesod-core
       - yesod-static