diff --git a/pyproject.toml b/pyproject.toml
index 1c70e5fc8289352225ebb7ceb71ddfd9d86b56a6..56bdd20c78af34d32b9dea8ba60de743fbd2ab3d 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -111,3 +111,8 @@ xarray = "xr"
 
 [project.urls]
 Repository = "https://git.noc.ac.uk/nocsurfaceprocesses/geospatialtools"
+
+[dependency-groups]
+dev = [
+    "bpython>=0.25",
+]