diff --git a/apps/settings/serializers/auth/ldap.py b/apps/settings/serializers/auth/ldap.py
index a6cc22455..472627e8a 100644
--- a/apps/settings/serializers/auth/ldap.py
+++ b/apps/settings/serializers/auth/ldap.py
@@ -15,7 +15,7 @@ class LDAPTestConfigSerializer(serializers.Serializer):
     AUTH_LDAP_BIND_PASSWORD = EncryptedField(required=False, allow_blank=True)
     AUTH_LDAP_SEARCH_OU = serializers.CharField()
     AUTH_LDAP_SEARCH_FILTER = serializers.CharField()
-    AUTH_LDAP_USER_ATTR_MAP = serializers.CharField()
+    AUTH_LDAP_USER_ATTR_MAP = serializers.JSONField()
     AUTH_LDAP_START_TLS = serializers.BooleanField(required=False)
     AUTH_LDAP = serializers.BooleanField(required=False)