diff --git a/src/modules/crud/crud.service.ts b/src/modules/crud/crud.service.ts
index 5c54fbe..7397b1b 100644
--- a/src/modules/crud/crud.service.ts
+++ b/src/modules/crud/crud.service.ts
@@ -76,6 +76,9 @@ export function requestGet(url: string, data?: any, params: CrudParams = {}) {
         type: 'GET',
         data,
         params,
+        headers: {
+            'Content-Type': 'application/json;charset=UTF-8',
+        },
     });
 }
 
@@ -85,6 +88,9 @@ export function requestPost(url: string, data = {}, params: CrudParams = {}) {
         type: 'POST',
         data,
         params,
+        headers: {
+            'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',
+        },
     });
 }
 
@@ -93,6 +99,9 @@ export function requestDelete(url: string, data = {}) {
         url,
         type: 'DELETE',
         data,
+        headers: {
+            'Content-Type': 'application/json;charset=UTF-8',
+        },
     });
 }
 
@@ -102,5 +111,8 @@ export function requestPut(url: string, data = {}, params: CrudParams = {}) {
         type: 'PUT',
         data,
         params,
+        headers: {
+            'Content-Type': 'application/x-www-form-urlencoded;charset=UTF-8',
+        },
     });
 }