diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index cd54d4dd4..f6add1638 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -11,12 +11,12 @@ jobs:
         runs-on: ubuntu-latest
         strategy:
             matrix:
-                php: [ "8.0", "8.1", "8.2", "8.3" ]
+                php: [ "7.4", "8.0", "8.1", "8.2", "8.3", "8.4", "8.5" ]
                 extensions: [""]
                 tools: [""]
                 composerflags: [""]
                 include:
-                  - php: "8.0"
+                  - php: "7.4"
                     extensions: "protobuf,grpc"
                     tools: "pecl"
                   - php: "8.3"
diff --git a/composer.json b/composer.json
index 2806aeb22..5dc2c9c3d 100644
--- a/composer.json
+++ b/composer.json
@@ -6,15 +6,15 @@
     "homepage": "https://github.com/googleapis/gax-php",
     "license": "BSD-3-Clause",
     "require": {
-        "php": "^8.0",
+        "php": "^7.4||^8.0",
         "google/auth": "^1.34.0",
-        "google/grpc-gcp": "^0.4",
+        "google/grpc-gcp": "^0.3.0",
         "grpc/grpc": "^1.13",
         "google/protobuf": "^v3.25.3||^4.26.1",
         "guzzlehttp/promises": "^2.0",
         "guzzlehttp/psr7": "^2.0",
         "google/common-protos": "^4.4",
-        "google/longrunning": "~0.4",
+        "google/longrunning": "^0.4",
         "ramsey/uuid": "^4.0"
     },
     "require-dev": {
@@ -44,5 +44,10 @@
         "test": "./vendor/bin/phpunit",
         "cs-lint": "vendor/bin/phpcs --standard=./ruleset.xml",
         "cs-fix": "vendor/bin/phpcbf --standard=./ruleset.xml"
+    },
+    "config": {
+        "audit": {
+            "block-insecure": false
+        }
     }
 }
diff --git a/src/Serializer.php b/src/Serializer.php
index 1c39ced47..5bb49d032 100644
--- a/src/Serializer.php
+++ b/src/Serializer.php
@@ -90,7 +90,7 @@ public function __construct(
         $messageTypeTransformers = [],
         $decodeFieldTransformers = [],
         $decodeMessageTypeTransformers = [],
-        $customEncoders = [],
+        $customEncoders = []
     ) {
         $this->fieldTransformers = $fieldTransformers;
         $this->messageTypeTransformers = $messageTypeTransformers;
diff --git a/tests/Tests/Unit/testdata/src/CustomOperationClient.php b/tests/Tests/Unit/testdata/src/CustomOperationClient.php
index 75b412bc1..943b907e8 100644
--- a/tests/Tests/Unit/testdata/src/CustomOperationClient.php
+++ b/tests/Tests/Unit/testdata/src/CustomOperationClient.php
@@ -27,7 +27,7 @@ abstract class BaseOperationRequest
     public string $arg2;
     public string $arg3;
 
-    public static function build(string $name, string $arg2, string $arg3): static
+    public static function build(string $name, string $arg2, string $arg3)
     {
         $request = new static();
         $request->name = $name;