diff --git a/.github/workflows/findsim.yml b/.github/workflows/findsim.yml
index 9baf8db..a759b3b 100644
--- a/.github/workflows/findsim.yml
+++ b/.github/workflows/findsim.yml
@@ -41,7 +41,7 @@ jobs:
       # Runs a set of commands using the runners shell
       - name: Build
         run: |
-          python -m pip install pymoose --pre --upgrade
+          python -m pip install git+https://github.com/BhallaLab/moose-core.git
           python -m pip install jsonschema
       - name: Test scripts
         run: ./test.sh