diff --git a/src/Helper/EventHelper.php b/src/Helper/EventHelper.php
index e68daaf..baa111e 100644
--- a/src/Helper/EventHelper.php
+++ b/src/Helper/EventHelper.php
@@ -73,7 +73,7 @@ public function toArray(): array
                 throw Ga4EventException::throwNameMissing();
             } elseif (strlen($name) > 40) {
                 throw Ga4EventException::throwNameTooLong();
-            } elseif (preg_match('/[^\w\d\-]/', $name)) {
+            } elseif (preg_match('/[^\w\d\-]|^\-|\-$/', $name)) {
                 throw Ga4EventException::throwNameInvalid();
             } elseif (in_array($name, EventType::RESERVED_NAMES) && !($this instanceof GtmEventType)) {
                 throw Ga4EventException::throwNameReserved($name);
diff --git a/test/Unit/EventTest.php b/test/Unit/EventTest.php
index d02738a..80c8b82 100644
--- a/test/Unit/EventTest.php
+++ b/test/Unit/EventTest.php
@@ -679,6 +679,42 @@ public function getName(): string
         $class->toArray();
     }
 
+    public function test_throw_name_invalid_starting_line()
+    {
+        $mock = new class extends Event\Refund
+        {
+            public function getName(): string
+            {
+                return '-almost-valid-name';
+            }
+        };
+
+        $class = $mock::new()->setTransactionId(1);
+
+        $this->expectException(Ga4EventException::class);
+        $this->expectExceptionCode(Ga4Exception::EVENT_NAME_INVALID);
+
+        $class->toArray();
+    }
+
+    public function test_throw_name_invalid_ending_line()
+    {
+        $mock = new class extends Event\Refund
+        {
+            public function getName(): string
+            {
+                return 'almost-valid-name-';
+            }
+        };
+
+        $class = $mock::new()->setTransactionId(1);
+
+        $this->expectException(Ga4EventException::class);
+        $this->expectExceptionCode(Ga4Exception::EVENT_NAME_INVALID);
+
+        $class->toArray();
+    }
+
     public function test_throw_name_reserved()
     {
         $mock = new class extends Event\Refund