diff --git a/setup.py b/setup.py
index 4da4447d8..196dfec15 100644
--- a/setup.py
+++ b/setup.py
@@ -42,7 +42,7 @@
             'atomistics==0.1.21',
             'numpy==1.26.3',
             'phonopy==2.21.0',
-            'pyiron_atomistics==0.4.7',
+            'pyiron_atomistics==0.4.9',
         ],
     },
     cmdclass=versioneer.get_cmdclass(),