diff --git a/.github/workflows/build_macosx.yml b/.github/workflows/build_macosx.yml
index e21097c..8f0c227 100644
--- a/.github/workflows/build_macosx.yml
+++ b/.github/workflows/build_macosx.yml
@@ -14,7 +14,7 @@ jobs:
 
     strategy:
       matrix:
-        python-version: ["3.9", "3.10", "3.11"]
+        python-version: ["3.8", "3.9", "3.10", "3.11"]
 
     steps:
     - uses: actions/checkout@v4	
@@ -30,7 +30,7 @@ jobs:
 
     - name: Install conda dependencies
       run: |
-        conda install c-compiler gfortran nceplibs-ip ninja numpy pip pytest setuptools
+        conda install c-compiler gfortran nceplibs-g2c nceplibs-ip ninja numpy pip pytest setuptools
 
     - name: Install with pip
       run: |
diff --git a/pyproject.toml b/pyproject.toml
index e2b198d..ce6a000 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,7 +35,7 @@ classifiers = [
   "Operating System :: MacOS",
 ]
 dependencies = [
-  "numpy",
+  "numpy<2.0.0",
   "grib2io"
 ] 
 dynamic = ["version"]