diff --git a/.ci_support/environment.yml b/.ci_support/environment.yml
index 51b0d39..beae805 100644
--- a/.ci_support/environment.yml
+++ b/.ci_support/environment.yml
@@ -4,7 +4,7 @@ dependencies:
 - coveralls
 - coverage
 - codacy-coverage
-- pyiron_base=0.9.1
+- pyiron_base=0.9.4
 - matplotlib=3.8.4
 - pystem=0.0.26
 - match-series
diff --git a/setup.py b/setup.py
index 1db6f63..a974af8 100644
--- a/setup.py
+++ b/setup.py
@@ -31,7 +31,7 @@
     keywords='pyiron',
     packages=find_packages(exclude=["*tests*"]),
     install_requires=[
-        'pyiron_base==0.9.1',
+        'pyiron_base==0.9.4',
         'matplotlib==3.8.4',
         'pystem==0.0.26',
         'hyperspy==2.1.0',