diff --git a/src/server/api/client/[clientId]/configuration.get.ts b/src/server/api/client/[clientId]/configuration.get.ts
index ed44f8d2..847f1735 100644
--- a/src/server/api/client/[clientId]/configuration.get.ts
+++ b/src/server/api/client/[clientId]/configuration.get.ts
@@ -26,7 +26,7 @@ export default definePermissionEventHandler(
       `attachment; filename="${WireGuard.cleanClientFilename(client.name) || clientId}.conf"`
     );
 
-    setHeader(event, 'Content-Type', 'text/plain');
+    setHeader(event, 'Content-Type', 'application/octet-stream');
     return config;
   }
 );
diff --git a/src/server/routes/cnf/[oneTimeLink].ts b/src/server/routes/cnf/[oneTimeLink].ts
index 5be913a9..bc38d9ea 100644
--- a/src/server/routes/cnf/[oneTimeLink].ts
+++ b/src/server/routes/cnf/[oneTimeLink].ts
@@ -32,6 +32,6 @@ export default defineEventHandler(async (event) => {
     'Content-Disposition',
     `attachment; filename="${WireGuard.cleanClientFilename(client.name) || client.id}.conf"`
   );
-  setHeader(event, 'Content-Type', 'text/plain');
+  setHeader(event, 'Content-Type', 'application/octet-stream');
   return config;
 });