diff --git a/.circleci/config.yml b/.circleci/config.yml
index 8279a7c..8594092 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -8,6 +8,9 @@ references:
       - image: quay.io/haskell_works/stack-build-minimal
     steps:
       - checkout
+      - run:
+          name: Upgrade Stack
+          command: stack upgrade
       - run:
           name: Digest
           command: |