diff --git a/codex-cli/src/cli.tsx b/codex-cli/src/cli.tsx
index 0af421a4..df72136e 100644
--- a/codex-cli/src/cli.tsx
+++ b/codex-cli/src/cli.tsx
@@ -1,5 +1,9 @@
 #!/usr/bin/env node
 
+// Hack to suppress deprecation warnings (punycode)
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+(process as any).noDeprecation = true;
+
 import type { AppRollout } from "./app";
 import type { ApprovalPolicy } from "./approvals";
 import type { CommandConfirmation } from "./utils/agent/agent-loop";