diff --git a/.meta/.readme.rst b/.meta/.readme.rst
index 7061df8f..40ed9912 100644
--- a/.meta/.readme.rst
+++ b/.meta/.readme.rst
@@ -847,7 +847,7 @@ The monitor thread may be disabled application-wide by setting
 Contributions
 -------------
 
-|GitHub-Commits| |GitHub-Issues| |GitHub-PRs| |OpenHub-Status| |GitHub-Contributions|
+|GitHub-Commits| |GitHub-Issues| |GitHub-PRs| |OpenHub-Status| |GitHub-Contributions| |CII Best Practices|
 
 All source code is hosted on `GitHub <https://github.com/tqdm/tqdm>`__.
 Contributions are welcome.
@@ -906,6 +906,8 @@ Citation information: |DOI| (publication), |DOI-code| (code)
    :target: https://codecov.io/gh/tqdm/tqdm
 .. |Codacy-Grade| image:: https://api.codacy.com/project/badge/Grade/3f965571598f44549c7818f29cdcf177
    :target: https://www.codacy.com/app/tqdm/tqdm/dashboard
+.. |CII Best Practices| image:: https://bestpractices.coreinfrastructure.org/projects/3264/badge
+   :target: https://bestpractices.coreinfrastructure.org/projects/3264
 .. |GitHub-Status| image:: https://img.shields.io/github/tag/tqdm/tqdm.svg?maxAge=86400&logo=github&logoColor=white
    :target: https://github.com/tqdm/tqdm/releases
 .. |GitHub-Forks| image:: https://img.shields.io/github/forks/tqdm/tqdm.svg?logo=github&logoColor=white
diff --git a/README.rst b/README.rst
index 31b31c57..6a103192 100644
--- a/README.rst
+++ b/README.rst
@@ -1013,7 +1013,7 @@ The monitor thread may be disabled application-wide by setting
 Contributions
 -------------
 
-|GitHub-Commits| |GitHub-Issues| |GitHub-PRs| |OpenHub-Status| |GitHub-Contributions|
+|GitHub-Commits| |GitHub-Issues| |GitHub-PRs| |OpenHub-Status| |GitHub-Contributions| |CII Best Practices|
 
 All source code is hosted on `GitHub <https://github.com/tqdm/tqdm>`__.
 Contributions are welcome.
@@ -1072,6 +1072,8 @@ Citation information: |DOI| (publication), |DOI-code| (code)
    :target: https://codecov.io/gh/tqdm/tqdm
 .. |Codacy-Grade| image:: https://api.codacy.com/project/badge/Grade/3f965571598f44549c7818f29cdcf177
    :target: https://www.codacy.com/app/tqdm/tqdm/dashboard
+.. |CII Best Practices| image:: https://bestpractices.coreinfrastructure.org/projects/3264/badge
+   :target: https://bestpractices.coreinfrastructure.org/projects/3264
 .. |GitHub-Status| image:: https://img.shields.io/github/tag/tqdm/tqdm.svg?maxAge=86400&logo=github&logoColor=white
    :target: https://github.com/tqdm/tqdm/releases
 .. |GitHub-Forks| image:: https://img.shields.io/github/forks/tqdm/tqdm.svg?logo=github&logoColor=white