diff --git a/src/proxy.ts b/src/proxy.ts
index 90713dd..5eaa4fe 100644
--- a/src/proxy.ts
+++ b/src/proxy.ts
@@ -104,7 +104,7 @@ export function createProxyServer(): http.Server {
               clientRes.writeHead(mockStatusCode, {
                 ...proxyRes.headers,
                 "X-Mock-Autogenerated": "true",
-                "X-Mock-Source": mockFile,
+                "X-Mock-Source": encodeURIComponent(mockFile),
                 "X-Mock-Status-Code": String(mockStatusCode),
               });
               clientRes.end(bodyBuffer);
@@ -140,7 +140,7 @@ export function createProxyServer(): http.Server {
           "Access-Control-Allow-Origin": "*",
           "Access-Control-Allow-Methods": "GET, POST, PUT, DELETE, OPTIONS",
           "Access-Control-Allow-Headers": "Content-Type",
-          "X-Mock-Source": mockFile,
+          "X-Mock-Source": encodeURIComponent(mockFile),
           "X-Mock-Status-Code": String(mockStatusCode),
           "X-Mock-Timestamp": new Date().toISOString(),
         });