diff --git a/zulip/README.md b/zulip/README.md
index 42f42e5..2fff879 100644
--- a/zulip/README.md
+++ b/zulip/README.md
@@ -3,7 +3,7 @@
 The [Zulip API](https://zulip.com/api) Python bindings require the
 following dependencies:
 
-* **Python (version >= 3.5)**
+* **Python (version >= 3.6)**
 * requests (version >= 0.12.1)
 
 **Note**: If you'd like to use the Zulip bindings with Python 2, we
diff --git a/zulip/setup.py b/zulip/setup.py
index 2094378..12eec45 100755
--- a/zulip/setup.py
+++ b/zulip/setup.py
@@ -40,12 +40,12 @@ package_info = dict(
         'License :: OSI Approved :: Apache Software License',
         'Topic :: Communications :: Chat',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
     ],
-    python_requires='>=3.5',
+    python_requires='>=3.6',
     url='https://www.zulip.org/',
     project_urls={
         "Source": "https://github.com/zulip/python-zulip-api/",
diff --git a/zulip/zulip/__init__.py b/zulip/zulip/__init__.py
index c28d95d..3ae1e32 100644
--- a/zulip/zulip/__init__.py
+++ b/zulip/zulip/__init__.py
@@ -20,7 +20,7 @@ from typing import Any, Callable, Dict, Iterable, IO, List, Mapping, Optional, T
 __version__ = "0.7.1"
 
 # Ensure the Python version is supported
-assert sys.version_info >= (3, 5)
+assert sys.version_info >= (3, 6)
 
 logger = logging.getLogger(__name__)
 
diff --git a/zulip_bots/setup.py b/zulip_bots/setup.py
index a367177..6396e29 100644
--- a/zulip_bots/setup.py
+++ b/zulip_bots/setup.py
@@ -38,12 +38,12 @@ package_info = dict(
         'License :: OSI Approved :: Apache Software License',
         'Topic :: Communications :: Chat',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
     ],
-    python_requires='>=3.5',
+    python_requires='>=3.6',
     url='https://www.zulip.org/',
     project_urls={
         "Source": "https://github.com/zulip/python-zulip-api/",
diff --git a/zulip_botserver/setup.py b/zulip_botserver/setup.py
index 9152ee7..c64c246 100644
--- a/zulip_botserver/setup.py
+++ b/zulip_botserver/setup.py
@@ -24,12 +24,12 @@ package_info = dict(
         'License :: OSI Approved :: Apache Software License',
         'Topic :: Communications :: Chat',
         'Programming Language :: Python :: 3',
-        'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
         'Programming Language :: Python :: 3.8',
+        'Programming Language :: Python :: 3.9',
     ],
-    python_requires='>=3.5',
+    python_requires='>=3.6',
     url='https://www.zulip.org/',
     project_urls={
         "Source": "https://github.com/zulip/python-zulip-api/",