diff --git a/packages/server/src/server/routes/zai.ts b/packages/server/src/server/routes/zai.ts
index 8172569..4632db2 100644
--- a/packages/server/src/server/routes/zai.ts
+++ b/packages/server/src/server/routes/zai.ts
@@ -361,6 +361,10 @@ function getZAIConfig(): ZAIConfig {
 }
 
 function updateZAIConfig(config: Partial<ZAIConfig>): void {
+    // Ensure directory exists
+    if (!existsSync(CONFIG_DIR)) {
+        mkdirSync(CONFIG_DIR, { recursive: true })
+    }
     const current = getZAIConfig()
     const updated = { ...current, ...config }
     writeFileSync(CONFIG_FILE, JSON.stringify(updated, null, 2))