diff --git a/setup.py b/setup.py
index c8dd6550..ae283a54 100644
--- a/setup.py
+++ b/setup.py
@@ -20,7 +20,7 @@
     include_package_data=True,
     install_requires=[
         "bleak>=0.19.0",
-        "bluetooth-adapters>=0.15.3; python_version>=3.9",
+        'bluetooth-adapters>=0.15.3; python_version>="3.9"',
         "bluetooth-clocks<1.0",
         "bluetooth-numbers>=1.0,<2.0",
         "paho-mqtt>=1.6.1",