diff --git a/README.md b/README.md
index 6c69ce4..a753eba 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,7 @@
 # Fānyì (翻译)
 
 A 🇨🇳 and 🇺🇸🇬🇧 translator in your command line, powered by iciba and groq.
+Ensure that the GROQ_API_KEY is set in your environment variables.
 
 [![NPM version][npm-image]][npm-url]
 [![npm download][download-image]][download-url]
diff --git a/bin/fanyi.mjs b/bin/fanyi.mjs
index 60c22c5..25b0cdb 100755
--- a/bin/fanyi.mjs
+++ b/bin/fanyi.mjs
@@ -1,6 +1,8 @@
 #!/usr/bin/env -S node --no-deprecation
+import process from 'process';
 
 import { readFile } from 'node:fs/promises';
+  GROQ_API_KEY = process.env.GROQ_API_KEY,
 import chalk from 'chalk';
 import { Command } from 'commander';
 import updateNotifier from 'update-notifier';
diff --git a/index.mjs b/index.mjs
index a4f36f2..caf572b 100644
--- a/index.mjs
+++ b/index.mjs
@@ -1,6 +1,8 @@
 import { XMLParser } from 'fast-xml-parser';
+import process from 'process';
 import gradient from 'gradient-string';
 import { Groq } from 'groq-sdk';
+  GROQ_API_KEY = process.env.GROQ_API_KEY,
 import fetch from 'node-fetch';
 import ora from 'ora';
 import { printIciba } from './lib/iciba.mjs';
diff --git a/tests/__snapshots__/index.test.ts.snap b/tests/__snapshots__/index.test.ts.snap
index a8dc42f..0f664d5 100644
--- a/tests/__snapshots__/index.test.ts.snap
+++ b/tests/__snapshots__/index.test.ts.snap
@@ -1,4 +1,5 @@
 // Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+Ensure that the GROQ_API_KEY is set in your environment variables.
 
 exports[`fanyi CLI > should print help if -h is given 1`] = `
 "Usage: fanyi [options] [command]