diff --git a/build-constraints.yaml b/build-constraints.yaml
index 09cf2f6b..dd6c0cbb 100644
--- a/build-constraints.yaml
+++ b/build-constraints.yaml
@@ -1,4 +1,4 @@
-ghc-major-version: "8.4"
+ghc-major-version: "8.6"
 
 # This affects which version of the Cabal file format we allow. We
 # should ensure that this is always no greater than the version