diff --git a/setup.cfg b/setup.cfg
index 8e56b59a..6a45f959 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -38,7 +38,7 @@ packages =
 install_requires =
     pandas==2.2.2
     wrapt==1.16.0
-    pythonnet
+    pythonnet==3.0.3
 python_requires = >= 3.10
 include_package_data = True
 zip_safe=False