diff --git a/.github/workflows/run_test.yml b/.github/workflows/run_test.yml
index 4f3f403..d01490b 100644
--- a/.github/workflows/run_test.yml
+++ b/.github/workflows/run_test.yml
@@ -24,7 +24,7 @@ jobs:
           architecture: x64
       - name: Install requirements.txt
         run: |
-          pip install -r requirements_2018.txt
+          pip install -r requirements_2018.txt --index-url=https://packages.idmod.org/api/pypi/pypi-production/simple
       - name: Install from source
         run: |
           pip install -e .