diff --git a/setup.py b/setup.py
index 5009e891..96313e8d 100644
--- a/setup.py
+++ b/setup.py
@@ -11,9 +11,9 @@
 from setuptools import find_packages
 from setuptools import setup
 
-if LooseVersion(sys.version) < LooseVersion("3.8"):
+if LooseVersion(sys.version) < LooseVersion("3.7"):
     raise RuntimeError(
-        "parallel-wavegan requires Python>=3.8, "
+        "parallel-wavegan requires Python>=3.7, "
         "but your Python is {}".format(sys.version)
     )
 if LooseVersion(pip.__version__) < LooseVersion("19"):
@@ -85,6 +85,7 @@
     extras_require=extras_require,
     entry_points=entry_points,
     classifiers=[
+        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",