diff --git a/apps/application/serializers/application_api_key.py b/apps/application/serializers/application_api_key.py
index 2603e46b634..fb83e81c504 100644
--- a/apps/application/serializers/application_api_key.py
+++ b/apps/application/serializers/application_api_key.py
@@ -31,7 +31,7 @@ class EditApplicationKeySerializer(serializers.Serializer):
     )
     is_permanent = serializers.BooleanField(required=False, label=_("Is permanent"))
     expire_time = serializers.DateTimeField(required=False, allow_null=True, label=_("Expiration time"))
-    remark = serializers.CharField(required=False, label=_("Remark"))
+    remark = serializers.CharField(required=False, allow_null=True, allow_blank=True, label=_("Remark"))
 
 
 class ApplicationKeySerializer(serializers.Serializer):
diff --git a/apps/application/tests/test_application_api_key.py b/apps/application/tests/test_application_api_key.py
new file mode 100644
index 00000000000..11df1cfd90a
--- /dev/null
+++ b/apps/application/tests/test_application_api_key.py
@@ -0,0 +1,11 @@
+from django.test import SimpleTestCase
+
+from application.serializers.application_api_key import EditApplicationKeySerializer
+
+
+class EditApplicationKeySerializerTests(SimpleTestCase):
+    def test_accepts_blank_remark(self):
+        serializer = EditApplicationKeySerializer(data={"remark": ""})
+
+        self.assertTrue(serializer.is_valid())
+        self.assertEqual(serializer.validated_data["remark"], "")