diff --git a/build-constraints.yaml b/build-constraints.yaml
index 41da79a5..9b138446 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3723,6 +3723,11 @@ packages:
         - map-syntax < 0 # GHC 8.4 via base-4.11.0.0
         - heist < 0 # GHC 8.4 via map-syntax
         - snap < 0 # GHC 8.4 via base-4.11.0.0
+        - conferer
+        # - conferer-snap # Because snap
+        - conferer-warp
+        - conferer-hspec
+        - conferer-provider-json
 
     "Tim Humphries <tim+stackage@utf8.me> @thumphries":
         - transformers-either < 0 # via exceptions-0.10.0