diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index af6c9270..44dde982 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -7,8 +7,6 @@ on:
       - '[0-9]+.[0-9]+'
   pull_request: ~
 
-env:
-  COMPOSER_ROOT_VERSION: 1.0.x-dev
 jobs:
   tests:
     name: Tests
@@ -20,9 +18,8 @@ jobs:
       fail-fast: false
       matrix:
         php:
-          - '7.1'
-          - '7.2'
           - '7.3'
+          - '7.4'
         composer_options: [ "" ]
         experimental: [false]