diff --git .github/workflows/unit-tests.yml .github/workflows/unit-tests.yml
index 3321075d8..a8c824bad 100644
--- .github/workflows/unit-tests.yml
+++ .github/workflows/unit-tests.yml
@@ -15,9 +15,9 @@ jobs:
         wp_version: ['master']
         include:
           - php: '8.0'
-            wp_version: '5.8'
+            wp_version: '5.9'
           - php: '7.4'
-            wp_version: '5.8'
+            wp_version: '5.9'
           - php: '7.4'
             wp_version: '5.4'
     env:
diff --git composer.json composer.json
index 92645a69f..91c0f4b15 100644
--- composer.json
+++ composer.json
@@ -35,7 +35,7 @@
 		"dealerdirect/phpcodesniffer-composer-installer": "^0.7.1",
 		"squizlabs/php_codesniffer" : "^3.5.4",
 		"wp-coding-standards/wpcs": "*",
-		"wp-phpunit/wp-phpunit": "^5.7",
+		"wp-phpunit/wp-phpunit": "^5.9",
 		"phpunit/phpunit": "^7.5"
 	}
 }
diff --git package.json package.json
index 92accdf67..d181c6a2c 100644
--- package.json
+++ package.json
@@ -8,7 +8,7 @@
 		"@babel/core": "~7.15.5",
 		"@wordpress/babel-preset-default": "~6.3.2",
 		"@wordpress/browserslist-config": "~4.1.0",
-		"@wordpress/env": "^4.1.1",
+		"@wordpress/env": "^4.2.0",
 		"@wordpress/stylelint-config": "~19.1.0",
 		"autoprefixer": "^9.8.6",
 		"grunt": "~1.4.1",