diff --git a/backend/services/api-test/src/main/java/io/metersphere/api/dto/definition/ApiTestCaseUpdateRequest.java b/backend/services/api-test/src/main/java/io/metersphere/api/dto/definition/ApiTestCaseUpdateRequest.java
index 910135e279..c4872a03f3 100644
--- a/backend/services/api-test/src/main/java/io/metersphere/api/dto/definition/ApiTestCaseUpdateRequest.java
+++ b/backend/services/api-test/src/main/java/io/metersphere/api/dto/definition/ApiTestCaseUpdateRequest.java
@@ -41,7 +41,7 @@ public class ApiTestCaseUpdateRequest implements Serializable {
     @Schema(description = "标签")
     private List<
             @NotBlank
-            @Size(min = 1, max = 50, message = "{api_test_case.tag.length_range}")
+            @Size(min = 1, max = 64, message = "{api_test_case.tag.length_range}")
                     String> tags;
 
     @Schema(description = "环境fk")