diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8984424..ebd5cb8 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        php: [ '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2' ]
+        php: [ '7.1', '7.2', '7.3', '7.4', '8.0', '8.1', '8.2', '8.3', '8.4' ]
 
     steps:
       - uses: actions/checkout@master
diff --git a/Makefile b/Makefile
index 770d1c2..92c921c 100644
--- a/Makefile
+++ b/Makefile
@@ -11,6 +11,6 @@ composer.lock: composer.json composer.phar
 
 composer.phar:
 	php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
-	php -r "if (hash_file('sha384', 'composer-setup.php') === '55ce33d7678c5a611085589f1f3ddf8b3c52d662cd01d4ba75c0ee0459970c2200a51f492d557530c71c15d8dba01eae') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
+	php -r "if (hash_file('sha384', 'composer-setup.php') === 'dac665fdc30fdd8ec78b38b9800061b4150413ff2e3b6f88543c636f7cd84f6db9189d43a81e5503cda447da73c7e5b6') { echo 'Installer verified'.PHP_EOL; } else { echo 'Installer corrupt'.PHP_EOL; unlink('composer-setup.php'); exit(1); }"
 	php composer-setup.php
 	php -r "unlink('composer-setup.php');"
\ No newline at end of file