diff --git a/azure-quantum/requirements-dev.txt b/azure-quantum/requirements-dev.txt
index 54c01a43..09c4a5f6 100644
--- a/azure-quantum/requirements-dev.txt
+++ b/azure-quantum/requirements-dev.txt
@@ -1,4 +1,4 @@
 pytest>=7.1.2
 pytest-xdist>=3.8.0,<4.0
-graphviz>=0.20.1
+graphviz>=0.21
 tox>=4.32.0