diff --git a/.ci_support/environment.yml b/.ci_support/environment.yml
index cec0fbc..62705a9 100644
--- a/.ci_support/environment.yml
+++ b/.ci_support/environment.yml
@@ -11,4 +11,4 @@ dependencies:
 - pandas =2.0.2
 - matplotlib-base =3.7.1
 - nbconvert =7.4.0
-- nbformat =5.8.0
+- nbformat =5.9.0
diff --git a/setup.py b/setup.py
index ecb747b..0ae3a9f 100644
--- a/setup.py
+++ b/setup.py
@@ -37,7 +37,7 @@
         'ipywidgets==8.0.6',
         'matplotlib==3.7.1',
         'nbconvert==7.4.0',
-        'nbformat==5.8.0',
+        'nbformat==5.9.0',
         'numpy==1.24.3',
         'pandas==2.0.2',
     ],