diff --git a/cabal.project b/cabal.project
index 3bfe6e08c..373d063f3 100644
--- a/cabal.project
+++ b/cabal.project
@@ -83,3 +83,7 @@ allow-newer: vault:hashable
 allow-newer: psqueues:hashable
 allow-newer: insert-ordered-containers:hashable
 allow-newer: openapi3:hashable
+
+-- http2-5.3.3 is blacklisted, force http2-5.3.2
+constraint:
+  http2 <=5.3.2