diff --git a/etc/environment.yml b/etc/environment.yml
index 0ee605803..dec937fe4 100644
--- a/etc/environment.yml
+++ b/etc/environment.yml
@@ -45,9 +45,8 @@ dependencies:
   # optional
   - affine
   - descartes
-  - fiona
   - geojson
-  - geopandas
+  - geopandas>=1.0
   - GitPython
   - imageio
   - netcdf4
diff --git a/pyproject.toml b/pyproject.toml
index 7a047a7fc..4c4cdc2fe 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -42,9 +42,8 @@ codegen = [
 optional = [
     "affine",
     "descartes",
-    "fiona",
     "geojson",
-    "geopandas",
+    "geopandas >=1.0",
     "GitPython",
     "imageio",
     "netcdf4",