diff --git a/pyproject.toml b/pyproject.toml
index 719e167..f68580f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -10,7 +10,6 @@ readme = "README.md"
 requires-python = ">=3.11,<3.14"
 dynamic = ["version"]
 dependencies = [
-  "fiona",
   "geopandas",
   "networkx",
   "numpy",
@@ -38,6 +37,9 @@ types = [
   "types-networkx",
   "ty",
 ]
+fiona = [
+  "fiona"
+]
 
 
 [tool.setuptools.package-data]