diff --git a/package-lock.json b/package-lock.json
index c4560fe..f4f23aa 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,7 +15,7 @@
 			},
 			"devDependencies": {
 				"@wordpress/env": "^5.15.0",
-				"@wordpress/scripts": "^26.1.0"
+				"@wordpress/scripts": "26.1.0"
 			}
 		},
 		"node_modules/@ampproject/remapping": {
diff --git a/package.json b/package.json
index da073c7..fa7e854 100644
--- a/package.json
+++ b/package.json
@@ -23,7 +23,7 @@
 	},
 	"devDependencies": {
 		"@wordpress/env": "^5.15.0",
-		"@wordpress/scripts": "^26.1.0"
+		"@wordpress/scripts": "26.1.0"
 	},
 	"dependencies": {
 		"@wordpress/i18n": "^4.30.0",
diff --git a/plugin.php b/plugin.php
index 1b4c438..c5c6362 100644
--- a/plugin.php
+++ b/plugin.php
@@ -272,9 +272,9 @@ function simpletoc_add_pagenumber($blocks, $headings)
 * @var array[] $blocks
 * @return array[]
 */
-function filter_headings_recursive(array $blocks): array
+function filter_headings_recursive($blocks)
 {
-    $arr            = [];
+    $arr = [];
     // allow developers to ignore specific blocks
     $ignored_blocks = apply_filters('simpletoc_excluded_blocks', []);