diff --git a/automated/build.sh b/automated/build.sh
index 884b19203..db7854f74 100755
--- a/automated/build.sh
+++ b/automated/build.sh
@@ -81,7 +81,7 @@ rm -f curator stack *.bz2
 curl -L "https://github.com/commercialhaskell/curator/releases/download/commit-54cc5a95a7e29550e0fd7a48b24ddad105d223b2/curator.bz2" | bunzip2 > curator
 chmod +x curator
 
-STACK_VERSION=2.15.7
+STACK_VERSION=3.1.1
 # rc url
 #curl -L https://github.com/commercialhaskell/stack/releases/download/rc%2Fv${STACK_VERSION}/stack-${STACK_VERSION}-linux-x86_64-bin > stack
 curl -L https://github.com/commercialhaskell/stack/releases/download/v${STACK_VERSION}/stack-${STACK_VERSION}-linux-x86_64-bin > stack