diff --git a/docs/installation.rst b/docs/installation.rst
index 7833a4632..c76327740 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -438,11 +438,11 @@ These platforms are built and tested for every change.
 +----------------------------------+--------------------------+-----------------------+
 | Fedora 32                        | 3.8                      |x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
-| macOS 10.15 Catalina             | 3.6, 3.7, 3.8, PyPy3     |x86-64                 |
+| macOS 10.15 Catalina             | 3.6, 3.7, 3.8, 3.9, PyPy3|x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
 | Ubuntu Linux 16.04 LTS (Xenial)  | 3.6, 3.7, 3.8, PyPy3     |x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
-| Ubuntu Linux 18.04 LTS (Bionic)  | 3.6, 3.7, 3.8, PyPy3     |x86-64                 |
+| Ubuntu Linux 18.04 LTS (Bionic)  | 3.6, 3.7, 3.8, 3.9, PyPy3|x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
 | Ubuntu Linux 20.04 LTS (Focal)   | 3.8                      |x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
@@ -450,7 +450,7 @@ These platforms are built and tested for every change.
 |                                  +--------------------------+-----------------------+
 |                                  | 3.6                      |x86-64                 |
 +----------------------------------+--------------------------+-----------------------+
-| Windows Server 2019              | 3.6, 3.7, 3.8            |x86, x86-64            |
+| Windows Server 2019              | 3.6, 3.7, 3.8, 3.9       |x86, x86-64            |
 |                                  +--------------------------+-----------------------+
 |                                  | PyPy3                    |x86                    |
 |                                  +--------------------------+-----------------------+