diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index ea1306c..8291782 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -9,7 +9,7 @@ jobs:
       fail-fast: true
       matrix:
         os: [ ubuntu-latest ]
-        php: [ 7.2, 7.3, 7.4, 8.0 ]
+        php: [ 7.2, 7.3, 7.4, 8.0, 8.1 ]
         dependency-version: [ prefer-lowest, prefer-stable ]
 
     name: P${{ matrix.php }} - ${{ matrix.dependency-version }} - ${{ matrix.os }}
diff --git a/README.md b/README.md
index 3c333c1..c0cafd7 100644
--- a/README.md
+++ b/README.md
@@ -34,7 +34,7 @@ Also look at the [examples](examples).
 
 ### Dependencies
 
-* PHP ^7.2
+* PHP ^7.2 | ^8.0
 * [Composer](https://getcomposer.org/doc/00-intro.md#installation-linux-unix-osx)
 
 ## Black box testing