diff --git a/CURATORS.md b/CURATORS.md
index 909e2ed1..9c069fed 100644
--- a/CURATORS.md
+++ b/CURATORS.md
@@ -382,6 +382,9 @@ will upgrade their packages to allow for the new GHC release.
 We prefer to prune packages causing upper bounds constraints **after** the LTS
 release to allow the maximum amount of packages to get into the newest LTS.
 
+You will almost always need to update the Win32 package version listed in the
+build-constraints.yaml file.
+
 After the first LTS release, the package pruning process may begin in the
 nightly build in order to move forward with getting the latest versions of
 packages compatible with the new GHC release.
diff --git a/build-constraints.yaml b/build-constraints.yaml
index 898baa64..534f3b3a 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3296,7 +3296,7 @@ packages:
 
     "GHC upper bounds":
         # Need to always match the version shipped with GHC
-        - Win32 == 2.3.1.1
+        - Win32 == 2.5.4.1
 
     "Stackage upper bounds":
         # https://github.com/fpco/stackage/issues/2663