diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c64ef6a..2757783 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -43,5 +43,6 @@ jobs:
       - uses: azjezz/setup-hhvm@v1
         with:
           version: lts-3.30
+      - run: composer self-update --2.2 # downgrade Composer for HHVM
       - run: hhvm $(which composer) install
       - run: hhvm vendor/bin/phpunit
diff --git a/README.md b/README.md
index 624ded0..0de8a3d 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # clue/reactphp-stdio
 
-[![CI status](https://github.com/clue/reactphp-stdio/workflows/CI/badge.svg)](https://github.com/clue/reactphp-stdio/actions)
+[![CI status](https://github.com/clue/reactphp-stdio/actions/workflows/ci.yml/badge.svg)](https://github.com/clue/reactphp-stdio/actions)
 [![installs on Packagist](https://img.shields.io/packagist/dt/clue/stdio-react?color=blue&label=installs%20on%20Packagist)](https://packagist.org/packages/clue/stdio-react)
 
 Async, event-driven and UTF-8 aware console input & output (STDIN, STDOUT) for