diff --git a/build-constraints.yaml b/build-constraints.yaml
index 6aad2eaa..100c26a8 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -2269,6 +2269,10 @@ packages:
         # Need to always match the version shipped with GHC
         - Win32 == 2.3.1.0
 
+        # https://github.com/fpco/stackage/issues/1446
+        - megaparsec < 5.0.0
+        - hspec-megaparsec < 0.2.0
+
 # end of packages