diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7aa835b..8d26380 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -21,7 +21,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.7", "3.8", "3.9"]
+        python-version: ["3.8", "3.9", "3.10"]
 
     steps:
       - uses: actions/checkout@v2
@@ -39,7 +39,14 @@ jobs:
 
       - name: Install conda packages
         shell: bash -l {0}
-        run: mamba install -c conda-forge biom-format patsy pytest xarray scikit-bio flake8 arviz cmdstanpy
+        run: mamba install -c conda-forge biom-format patsy pytest xarray scikit-bio flake8 arviz
+
+      # Temp req before CmdStanPy cuts a new release
+      - name: Install develop branch of CmdStanPy
+        shell: bash -l {0}
+        run: >
+          pip install git+https://github.com/stan-dev/cmdstanpy.git@develop;
+          install_cmdstan
 
       - name: Install BIRDMAn
         shell: bash -l {0}