Doc supported Python versions in README.rst

README.rst

@@ -473,15 +473,18 @@ This section lists ``pip-tools`` features that are currently deprecated.
 Versions and compatibility
 ==========================
 
-The table below summarizes the latest ``pip-tools`` versions with the required ``pip``
-versions.
-
-+---------------+-----------------+
-| pip-tools     | pip             |
-+===============+=================+
-| 4.5.*         | 8.1.3 - 20.0.2  |
-+---------------+-----------------+
-| 5.0.0 - 5.3.0 | 20.0 - 20.1.1   |
-+---------------+-----------------+
-| >= 5.4.0      | 20.1 - 20.3.*   |
-+---------------+-----------------+
+The table below summarizes the latest ``pip-tools`` versions with the required
+``pip`` and Python versions. Generally, ``pip-tools`` supports the same Python
+versions as the required ``pip`` versions.
+
++---------------+----------------+----------------+
+| pip-tools     | pip            | Python         |
++===============+================+================+
+| 4.5.*         | 8.1.3 - 20.0.2 | 2.7, 3.5 - 3.8 |
++---------------+----------------+----------------+
+| 5.0.0 - 5.3.0 | 20.0 - 20.1.1  | 2.7, 3.5 - 3.8 |
++---------------+----------------+----------------+
+| 5.4.0         | 20.1 - 20.3.*  | 2.7, 3.5 - 3.8 |
++---------------+----------------+----------------+
+| >= 5.5.0      | 20.1 - 20.3.*  | 2.7, 3.5 - 3.9 |
++---------------+----------------+----------------+