diff --git a/setup.py b/setup.py
index 69bdb47..15a460f 100644
--- a/setup.py
+++ b/setup.py
@@ -17,6 +17,6 @@ setup(
     scripts=['src/phid'],
 
     setup_requires=['pytest-runner'],
-    install_requires=['aiohttp', 'pyYAML', 'ldap3'],
+    install_requires=['aiohttp==2.3.8', 'pyYAML', 'ldap3'],
     tests_require=['pytest', 'pytest-aiohttp']
 )