diff --git a/build-constraints.yaml b/build-constraints.yaml
index e654e8c9..d809ac7d 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -4613,14 +4613,6 @@ packages:
         - Win32 == 2.6.1.0
 
     "Stackage upper bounds":
-      # https://github.com/commercialhaskell/stackage/issues/4966
-      - megaparsec < 8
-      - megaparsec-tests < 8
-      - 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/5037
       - haskeline < 0.8.0
       - structured-cli < 2.6