diff --git a/composer.json b/composer.json
index 650af89..8b7df74 100644
--- a/composer.json
+++ b/composer.json
@@ -36,10 +36,10 @@
         "ext-dbase": "For dbf files parsing"
     },
     "require-dev": {
-        "phpstan/phpstan": "^1.10",
         "phpmyadmin/coding-standard": "^3.0.0",
+        "phpstan/phpstan": "^1.10",
         "phpstan/phpstan-phpunit": "^1.3",
-        "phpunit/phpunit": "^7.4 || ^8 || ^9"
+        "phpunit/phpunit": "^7.5 || ^8.5 || ^9.6 || ^10.3"
     },
     "autoload": {
         "psr-4": {
diff --git a/tests/ShapeFileTest.php b/tests/ShapeFileTest.php
index 9697d6a..02ab98d 100644
--- a/tests/ShapeFileTest.php
+++ b/tests/ShapeFileTest.php
@@ -61,7 +61,7 @@ public function testLoad(string $filename, int $records, ?int $parts): void
      *
      * @return array
      */
-    public function provideFiles(): array
+    public static function provideFiles(): array
     {
         return [
             [
@@ -141,7 +141,7 @@ public function testGetDBFHeader(): void
      *
      * @return array
      */
-    public function provideErrorFiles(): array
+    public static function provideErrorFiles(): array
     {
         $result = [
             ['data/no-shp.*'],
@@ -406,7 +406,7 @@ public function testMeasureShapeSaveLoad(int $type, array $points): void
      *
      * @return array
      */
-    public function shapes(): array
+    public static function shapes(): array
     {
         return [
             [
diff --git a/tests/UtilTest.php b/tests/UtilTest.php
index 7fce743..4a24275 100644
--- a/tests/UtilTest.php
+++ b/tests/UtilTest.php
@@ -51,7 +51,7 @@ public function testLoadData(string $type, $data, $expected): void
      *
      * @return array
      */
-    public function data(): array
+    public static function data(): array
     {
         return [
             [