diff --git a/build-constraints.yaml b/build-constraints.yaml
index aa84d6b8..11192b72 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -3716,7 +3716,6 @@ packages:
         - servant-JuicyPixels < 0 # GHC 8.4 via base-4.11.0.0
         - servant-generic < 0 # GHC 8.4 via base-4.11.0.0
         - servant-yaml < 0 # GHC 8.4 via base-4.11.0.0
-        - slack-web < 0 # GHC 8.4 via base-4.11.0.0
         - snap < 0 # GHC 8.4 via base-4.11.0.0
         - spdx < 0 # GHC 8.4 via base-4.11.0.0
         - statestack < 0 # GHC 8.4 via base-4.11.0.0