diff --git a/.github/workflows/release-pypi-core.yml b/.github/workflows/release-pypi-core.yml
index 70f03de2..bdbf2653 100644
--- a/.github/workflows/release-pypi-core.yml
+++ b/.github/workflows/release-pypi-core.yml
@@ -54,7 +54,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ${{ fromJson(env.PYTHON_SUPPORTED_VERSIONS) }}
+        python-version: ${{ fromJSON(env.PYTHON_SUPPORTED_VERSIONS) }}
     steps:
       - uses: actions/checkout@v1
       - name: Create environment and install package dependencies