diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 7df0721..c92fc1c 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        php: [ '7.4', '8.0', '8.1', '8.2', '8.3', '8.4' ]
+        php: [ '8.1', '8.2', '8.3', '8.4' ]
         os: [ ubuntu-latest, macos-latest, windows-latest ]
         stability: [ prefer-lowest, prefer-stable ]
     steps:
diff --git a/composer.json b/composer.json
index 678e684..1ade799 100644
--- a/composer.json
+++ b/composer.json
@@ -17,7 +17,7 @@
     ],
     "require": {
         "php": "^8.1",
-        "phplrt/source-contracts": "^4.0"
+        "phplrt/source-contracts": "^3.7"
     },
     "autoload": {
         "psr-4": {
@@ -37,8 +37,8 @@
     },
     "extra": {
         "branch-alias": {
-            "dev-master": "4.x-dev",
-            "dev-main": "4.x-dev"
+            "dev-master": "3.x-dev",
+            "dev-main": "3.x-dev"
         }
     },
     "config": {