diff --git a/setup.py b/setup.py
index f2a5214df..5d036c8f0 100644
--- a/setup.py
+++ b/setup.py
@@ -53,7 +53,7 @@
         'pandas==2.1.0',
         'phonopy==2.20.0',
         'pint==0.22',
-        'pyiron_base==0.6.5',
+        'pyiron_base==0.6.6',
         'scipy==1.11.2',
         'seekpath==2.1.0',
         'scikit-learn==1.3.0',