diff --git a/python-package/setup.py b/python-package/setup.py
index a2146f6be..ac67af1d4 100644
--- a/python-package/setup.py
+++ b/python-package/setup.py
@@ -63,5 +63,5 @@ setup(name='xgboost',
                    'Programming Language :: Python :: 3.5',
                    'Programming Language :: Python :: 3.6',
                    'Programming Language :: Python :: 3.7'],
-      python_requires='>=3.4',
+      python_requires='>=3.5',
       url='https://github.com/dmlc/xgboost')
diff --git a/python-package/setup_pip.py b/python-package/setup_pip.py
index 86ba0ae4f..00be3fcc3 100644
--- a/python-package/setup_pip.py
+++ b/python-package/setup_pip.py
@@ -80,5 +80,5 @@ setup(name='xgboost',
                    'Programming Language :: Python :: 3.5',
                    'Programming Language :: Python :: 3.6',
                    'Programming Language :: Python :: 3.7'],
-      python_requires='>=3.4',
+      python_requires='>=3.5',
       url='https://github.com/dmlc/xgboost')