diff --git a/.github/workflows/tests.yaml b/.github/workflows/tests.yaml
index 6618b2d..98f6d30 100644
--- a/.github/workflows/tests.yaml
+++ b/.github/workflows/tests.yaml
@@ -40,7 +40,8 @@ jobs:
           environment-name: test
           create-args: >-
             python=${{ matrix.python-version }}
-            geopandas
+            geopandas<1
+            numpy<2
             netcdf4
             odc-geo
             pandoc
diff --git a/pyproject.toml b/pyproject.toml
index 188e670..8ab7eb4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -35,14 +35,14 @@ requires-python = ">=3.10"
 dependencies = [
     "appdirs",
     "click>=6.0",
-    "geopandas>=0.7",
+    "geopandas>=0.7,<1",
     "odc_geo",
     "rasterio>=1.3",
     "rioxarray>=0.4",
     "scipy",
     "xarray>=0.17",
     "pyproj>=2",
-    "numpy>=1.20",
+    "numpy>=1.20,<2",
 ]
 
 [project.urls]