diff --git a/setup.py b/setup.py
index 75edb7b..5c95940 100644
--- a/setup.py
+++ b/setup.py
@@ -38,7 +38,8 @@
     python_requires=">=3.7.0",
     install_requires=[
         "aiohttp==3.8.6 ; python_version=='3.7'",
-        "aiohttp ; python_version>'3.7'"
+        "aiohttp ; python_version>'3.7'",
+        "aiofiles"
     ],
     setup_requires=["pytest-runner"],
     extras_require={