diff --git a/.travis.yml b/.travis.yml
index 0c09105e..e9dbd6fc 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,16 +11,28 @@ matrix:
     - os: osx
       env:
         - PYTHON_VERSION=3.6
+    - os: osx
+      env:
+        - PYTHON_VERSION=3.7
+    - os: osx
+      env:
+        - PYTHON_VERSION=3.8
+    - os: osx
+      env:
+        - PYTHON_VERSION=3.9
     - os: linux
       env:
         - PYTHON_VERSION=3.6
-        - DOC=true
-    - os: osx
+    - os: linux
       env:
         - PYTHON_VERSION=3.7
+        - DOC=true
     - os: linux
       env:
-        - PYTHON_VERSION=3.7
+        - PYTHON_VERSION=3.8
+    - os: linux
+      env:
+        - PYTHON_VERSION=3.9
 notifications:
   email: false
 
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
index 171be411..afd996e6 100644
--- a/CONTRIBUTING.rst
+++ b/CONTRIBUTING.rst
@@ -110,7 +110,7 @@ Before you submit a pull request, check that it meets these guidelines:
 2. If the pull request adds functionality, the docs should be updated. Put
    your new functionality into a function with a docstring, and add the
    feature to the list in README.rst.
-3. The pull request should work for Python 3.5, 3.6, and 3.7.
+3. The pull request should work for Python 3.6-3.9.
 
 Tips
 ----
diff --git a/setup.py b/setup.py
index df97672e..0eb88d15 100644
--- a/setup.py
+++ b/setup.py
@@ -56,6 +56,7 @@ def get_version():
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
     ],
     description="rasterio xarray extension.",
     install_requires=requirements,