diff --git a/check b/check
index aee033e9..7c0440a4 100755
--- a/check
+++ b/check
@@ -3,4 +3,4 @@
 # Convenience script for checking constraints locally
 
 cd `dirname $0`
-exec stack exec --resolver ghc-8.4.3 stackage-curator check
+exec stack exec --resolver ghc-8.6.1 stackage-curator check
diff --git a/etc/ci-script.sh b/etc/ci-script.sh
index 12d1853c..27c860e0 100755
--- a/etc/ci-script.sh
+++ b/etc/ci-script.sh
@@ -2,7 +2,7 @@
 
 set -euxo pipefail
 
-export GHCVER=8.4.3
+export GHCVER=8.6.1
 
 # Download and unpack the stack executable
 mkdir -p ~/.local/bin