diff --git a/src/Keys.php b/src/Keys.php
index fc7b0008..4327f7dc 100644
--- a/src/Keys.php
+++ b/src/Keys.php
@@ -58,7 +58,7 @@ public function generateScopedSearchKey(
         string $searchKey,
         array $parameters
     ): string {
-        $paramStr     = json_encode($parameters, JSON_THROW_ON_ERROR);
+        $paramStr     = json_encode((object)$parameters, JSON_THROW_ON_ERROR);
         $digest       = base64_encode(
             hash_hmac(
                 'sha256',
diff --git a/tests/Feature/KeysTest.php b/tests/Feature/KeysTest.php
index 658d0393..24783383 100644
--- a/tests/Feature/KeysTest.php
+++ b/tests/Feature/KeysTest.php
@@ -73,4 +73,13 @@ public function testCanGenerateScopedSearchKey(): void
         ]);
         $this->assertEquals($scopedSearchKey, $result);
     }
+
+    public function testGenerateScopedSearchKeyWithoutParams(): void
+    {
+        $searchKey = "RN23GFr1s6jQ9kgSNg2O7fYcAUXU7127";
+        $scopedSearchKey =
+            "R2pFZkxSemhGZmEvOXd2WWpYNWVSTzF2N2xRSk9jQmlpZ2NpdnloUTFGYz1STjIze30=";
+        $result = $this->client()->keys->generateScopedSearchKey($searchKey, []);
+        $this->assertEquals($scopedSearchKey, $result);
+    }
 }