diff --git a/build-constraints.yaml b/build-constraints.yaml
index 02ee4107..e7d1ee4c 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -7325,6 +7325,8 @@ packages:
         # https://github.com/commercialhaskell/stackage/issues/6745
         - xlsx < 1.1.0
 
+        # https://github.com/commercialhaskell/stackage/issues/6748
+        - postgresql-simple < 0.6.5
 # end of packages
 
 # Package flags are applied to individual packages, and override the values of