diff --git a/requirements.txt b/requirements.txt
index ac341a7..4ab2ac1 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,3 @@
-asyncio
 urwid==2.0.1
 pyperclip==1.6.2
 requests
diff --git a/setup.py b/setup.py
index 9e73b2b..86a90c3 100644
--- a/setup.py
+++ b/setup.py
@@ -14,8 +14,8 @@
     url='https://github.com/haskellcamargo/sclack',
     scripts=["app.py"],
     packages=find_packages(),
+    python_requires=">=3.5",
     install_requires=[
-        'asyncio',
         'urwid>2',
         'pyperclip',
         'requests',