diff --git a/.github/workflows/conda-package.yml b/.github/workflows/conda-package.yml
index 84a0253..9299f6a 100644
--- a/.github/workflows/conda-package.yml
+++ b/.github/workflows/conda-package.yml
@@ -103,6 +103,7 @@ jobs:
     strategy:
       matrix:
         python: ['3.9', '3.10']
+	numpy: ['1.26*']
         experimental: [false]
         runner: [ubuntu-latest]
     continue-on-error: ${{ matrix.experimental }}
@@ -132,7 +133,7 @@ jobs:
           . $CONDA/etc/profile.d/conda.sh
           CHANNELS="-c $GITHUB_WORKSPACE/channel ${{ env.CHANNELS }}"
           export PACKAGE_VERSION=$(python -c "${VER_SCRIPT1} ${VER_SCRIPT2}")
-          conda create -n ${{ env.TEST_ENV_NAME }} $PACKAGE_NAME=${PACKAGE_VERSION} python=${{ matrix.python }} $CHANNELS --only-deps --dry-run > lockfile
+          conda create -n ${{ env.TEST_ENV_NAME }} $PACKAGE_NAME=${PACKAGE_VERSION} python=${{ matrix.python }} numpy=${{ matrix.numpy }} $CHANNELS --only-deps --dry-run > lockfile
           cat lockfile
       - name: Set pkgs_dirs
         run: |
@@ -154,7 +155,7 @@ jobs:
           . $CONDA/etc/profile.d/conda.sh
           CHANNELS="-c $GITHUB_WORKSPACE/channel ${{ env.CHANNELS }}"
           export PACKAGE_VERSION=$(python -c "${VER_SCRIPT1} ${VER_SCRIPT2}")
-          conda create -n ${{ env.TEST_ENV_NAME }} $PACKAGE_NAME=${PACKAGE_VERSION} pytest python=${{ matrix.python }} $CHANNELS
+          conda create -n ${{ env.TEST_ENV_NAME }} $PACKAGE_NAME=${PACKAGE_VERSION} pytest python=${{ matrix.python }} numpy=${{ matrix.numpy }} $CHANNELS
           # Test installed packages
           conda list
       - name: Run tests
@@ -170,6 +171,7 @@ jobs:
     strategy:
       matrix:
         python: ['3.9', '3.10']
+	numpy: ['1.26*']
         experimental: [false]
         runner: [windows-2019]
     continue-on-error: ${{ matrix.experimental }}
@@ -205,7 +207,7 @@ jobs:
           FOR /F "tokens=* USEBACKQ" %%F IN (`python -c "%SCRIPT%"`) DO (
              SET PACKAGE_VERSION=%%F
           )
-          conda create -n ${{ env.TEST_ENV_NAME }} ${{ env.PACKAGE_NAME }}=%PACKAGE_VERSION% python=${{ matrix.python }} -c ${{ env.GITHUB_WORKSPACE }}/channel ${{ env.CHANNELS }} --only-deps --dry-run > lockfile
+          conda create -n ${{ env.TEST_ENV_NAME }} ${{ env.PACKAGE_NAME }}=%PACKAGE_VERSION% python=${{ matrix.python }} numpy=${{ matrix.numpy }} -c ${{ env.GITHUB_WORKSPACE }}/channel ${{ env.CHANNELS }} --only-deps --dry-run > lockfile
           more lockfile
       - name: Cache conda packages
         uses: actions/cache@v4
@@ -227,7 +229,7 @@ jobs:
           FOR /F "tokens=* USEBACKQ" %%F IN (`python -c "%SCRIPT%"`) DO (
              SET PACKAGE_VERSION=%%F
           )
-          conda create -n ${{ env.TEST_ENV_NAME }} ${{ env.PACKAGE_NAME }}=%PACKAGE_VERSION% pytest python=${{ matrix.python }} -c ${{ env.GITHUB_WORKSPACE }}/channel ${{ env.CHANNELS }}
+          conda create -n ${{ env.TEST_ENV_NAME }} ${{ env.PACKAGE_NAME }}=%PACKAGE_VERSION% pytest python=${{ matrix.python }} numpy=${{ matrix.numpy }} -c ${{ env.GITHUB_WORKSPACE }}/channel ${{ env.CHANNELS }}
           # Test installed packages
           conda list
       - name: Run tests