diff --git a/pyproject.toml b/pyproject.toml
index ed29d8da..b2be65db 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -33,7 +33,7 @@ dependencies = [
     'numpy',
     'packaging',
     'panel >=1.0.0',
-    'param',
+    'param >=1.9.3,<3.0',
     'pyproj',
     'shapely',
     'xyzservices',