diff --git a/config/engine.json b/config/engine.json
index 047a07c..954e5f5 100644
--- a/config/engine.json
+++ b/config/engine.json
@@ -20,7 +20,7 @@
         "psidts_env": "GEMINI_WEB_1PSIDTS"
       },
       "claude": {
-        "api_key_env": "CLIPROXY_API_KEY",
+        "api_key_env": "ANTHROPIC_API_KEY",
         "base_url": "https://cliproxy.gru.farm/api/provider/claude",
         "model": "claude-opus-4-6",
         "max_tokens": 4096,