diff --git a/docs/requirements.txt b/docs/requirements.txt
index b245f12..48a4b3a 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -8,7 +8,7 @@ numpy==1.24.3
 numpydoc==1.5.0
 astropy==5.3.1
 pydot==2.0.0
-graphviz==0.20.1
+graphviz==0.20.3
 astroquery==0.4.6
 boto3==1.28.7
 plotly==5.20.0