diff --git a/build-constraints.yaml b/build-constraints.yaml
index 652d5ee7..87b40c5c 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3130,6 +3130,9 @@ packages:
         # https://github.com/fpco/stackage/issues/2479
         - ether < 0.5.0.0
         - transformers-lift < 0.2.0.0
+
+        # https://github.com/fpco/stackage/issues/2481
+        - megaparsec < 5.3.0
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of