diff --git a/committee/mock_availability_gateway/setup.py b/committee/mock_availability_gateway/setup.py
index ce73c34..d248422 100644
--- a/committee/mock_availability_gateway/setup.py
+++ b/committee/mock_availability_gateway/setup.py
@@ -16,7 +16,7 @@
     packages=find_packages(),
     install_requires=[
         'aiohttp==3.6.2',
-        'PyYAML==5.1',
+        'PyYAML==5.4',
         'Web3==5.2.2',
     ],
     package_data={