diff --git a/pyproject.toml b/pyproject.toml
index e0980766..1afacf6c 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -11,8 +11,7 @@ authors = [
 dependencies = [
     "dask",
     "geopandas>=0.10",
-    "hydroengine",
-    "hydromt>=0.9.1",
+    "hydromt>=0.9.1,<0.10",
     "netcdf4",
     "numpy",
     "pandas",
@@ -41,6 +40,7 @@ io = [
     "requests",
 ]
 extra = [
+    "hydroengine",
     "gwwapi",
     "pcraster",
     "pyet",