diff --git a/build-constraints.yaml b/build-constraints.yaml
index cefb8c99..3cbc2863 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4871,6 +4871,7 @@ packages:
       - hspec-megaparsec < 2.1
       - parser-combinators < 1.2.1
       - parser-combinators-tests < 1.2.1
+      - mmark < 0.0.7.2
 
       # https://github.com/commercialhaskell/stackage/issues/4992
       - swagger2 < 2.5