diff --git a/.github/dependabot.yml b/.github/dependabot.yml
index 415b3b8..1830377 100644
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -7,6 +7,4 @@ updates:
       time: "21:00"
     open-pull-requests-limit: 10
     ignore:
-      - dependency-name: phpunit/phpunit
-        versions:
-          - "^4.8"
\ No newline at end of file
+      - dependency-name: phpunit/phpunit
\ No newline at end of file
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f8b8c9f..d4ef718 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ jobs:
   phpunit:
     strategy:
       matrix:
-        php_version: [5.6, 7.0, 7.1, 7.2, 7.3, 7.4]
+        php_version: [7.4, 8.0, 8.1]
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
diff --git a/.gitignore b/.gitignore
index bf3faa4..2c097a4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,4 +8,5 @@ phpunit.functional.xml
 composer.lock
 /vendor
 /.idea
-/.vscode
\ No newline at end of file
+/.vscode
+.phpunit.result.cache
\ No newline at end of file
diff --git a/composer.json b/composer.json
index 7484df7..da63f58 100644
--- a/composer.json
+++ b/composer.json
@@ -18,14 +18,15 @@
     ],
     "minimum-stability": "stable",
     "require": {
-        "php": ">=5.6",
+        "php": "^7.4 || ^8.0",
         "ext-curl": "*",
         "ext-json": "*",
         "ext-mbstring": "*",
-        "guzzlehttp/guzzle": "^6.2"
+        "guzzlehttp/guzzle": "^7.0.0",
+        "guzzlehttp/psr7": "^1.7 || ^2.0"
     },
     "require-dev": {
-        "phpunit/phpunit": "^5.7",
+        "phpunit/phpunit": "^9.0",
         "squizlabs/php_codesniffer": "~3.7"
     },
     "autoload": {
diff --git a/phpunit.xml b/phpunit.xml
index a62f2b9..fa7c2b9 100644
--- a/phpunit.xml
+++ b/phpunit.xml
@@ -9,17 +9,23 @@
          convertNoticesToExceptions="true"
          convertWarningsToExceptions="true"
 >
+
     <testsuites>
         <testsuite name="Tests">
             <directory>./tests/</directory>
         </testsuite>
     </testsuites>
-    <filter>
-        <whitelist processUncoveredFilesFromWhitelist="true">
+
+    <coverage includeUncoveredFiles="true"
+              processUncoveredFiles="true"
+              ignoreDeprecatedCodeUnits="true"
+              disableCodeCoverageIgnore="true">
+        <include>
             <directory suffix=".php">src/goplus</directory>
-        </whitelist>
+        </include>
         <exclude>
             <directory suffix=".php">src/lib</directory>
         </exclude>
-    </filter>
+    </coverage>
+
 </phpunit>
\ No newline at end of file
diff --git a/src/lib/client/Model/ParseAbiDataRequest.php b/src/lib/client/Model/ParseAbiDataRequest.php
index b2c527e..4d1fdfd 100644
--- a/src/lib/client/Model/ParseAbiDataRequest.php
+++ b/src/lib/client/Model/ParseAbiDataRequest.php
@@ -16,7 +16,7 @@
  * No description provided (generated by Swagger Codegen https://github.com/swagger-api/swagger-codegen)
  *
  * OpenAPI spec version: 1.0
- * 
+ *
  * Generated by: https://github.com/swagger-api/swagger-codegen.git
  * Swagger Codegen version: 3.0.45
  */
@@ -195,10 +195,10 @@ public function getModelName()
     public function getTranscationTypeAllowableValues()
     {
         return [
-            self::TRANSCATION_TYPE_COMMON
-            self::TRANSCATION_TYPE_ETH_SIGN_TYPED_DATA_V4
-            self::TRANSCATION_TYPE_PERSONAL_SIGN
-            self::TRANSCATION_TYPE_ETH_SIGN
+            self::TRANSCATION_TYPE_COMMON,
+            self::TRANSCATION_TYPE_ETH_SIGN_TYPED_DATA_V4,
+            self::TRANSCATION_TYPE_PERSONAL_SIGN,
+            self::TRANSCATION_TYPE_ETH_SIGN,
         ];
     }