diff --git a/zulip/setup.py b/zulip/setup.py
index d7e6f32..07dbe2c 100755
--- a/zulip/setup.py
+++ b/zulip/setup.py
@@ -39,7 +39,14 @@ package_info = dict(
         'Intended Audience :: Developers',
         'License :: OSI Approved :: MIT License',
         'Topic :: Communications :: Chat',
+        'Programming Language :: Python :: 2',
+        'Programming Language :: Python :: 2.7',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
     ],
+    python_requires='>=2.7,!=3.0.x,!=3.1.x,!=3.2.x,!=3.3.x,!=3.4.x',
     url='https://www.zulip.org/',
     data_files=list(recur_expand('share/zulip', 'integrations')),
     include_package_data=True,
diff --git a/zulip_bots/setup.py b/zulip_bots/setup.py
index 488612d..93469a3 100644
--- a/zulip_bots/setup.py
+++ b/zulip_bots/setup.py
@@ -38,7 +38,12 @@ package_info = dict(
         'Intended Audience :: Developers',
         'License :: OSI Approved :: MIT License',
         'Topic :: Communications :: Chat',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
     ],
+    python_requires='>=3.5',
     url='https://www.zulip.org/',
     entry_points={
         'console_scripts': [
diff --git a/zulip_botserver/setup.py b/zulip_botserver/setup.py
index fdb240f..753268b 100644
--- a/zulip_botserver/setup.py
+++ b/zulip_botserver/setup.py
@@ -22,7 +22,12 @@ package_info = dict(
         'Intended Audience :: Developers',
         'License :: OSI Approved :: MIT License',
         'Topic :: Communications :: Chat',
+        'Programming Language :: Python :: 3',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
     ],
+    python_requires='>=3.5',
     url='https://www.zulip.org/',
     entry_points={
         'console_scripts': [