diff --git a/README.md b/README.md
index dc20fe9..20ee138 100644
--- a/README.md
+++ b/README.md
@@ -53,7 +53,7 @@ fizzy <resource> <action> [options]
 | Option | Environment Variable | Description |
 |--------|---------------------|-------------|
 | `--token` | `FIZZY_TOKEN` | API access token |
-| `--account` | `FIZZY_ACCOUNT` | Account ID |
+| `--account` | `FIZZY_ACCOUNT` | Account slug (from `fizzy identity show`) |
 | `--format` | | Output format: `json` (default), `text` |
 | `--quiet` | | Suppress non-essential output |
 | `--verbose` | | Show request/response details |
diff --git a/lib/fizzy/cli.rb b/lib/fizzy/cli.rb
index 0760ef6..33807e2 100644
--- a/lib/fizzy/cli.rb
+++ b/lib/fizzy/cli.rb
@@ -5,7 +5,7 @@ def self.exit_on_failure?
     end
 
     class_option :token, type: :string, desc: "API access token (or FIZZY_TOKEN env var)"
-    class_option :account, type: :string, desc: "Account ID (or FIZZY_ACCOUNT env var)"
+    class_option :account, type: :string, desc: "Account slug (or FIZZY_ACCOUNT env var)"
     class_option :api_url, type: :string, desc: "API base URL (default: https://app.fizzy.do)"
     class_option :format, type: :string, default: "json", desc: "Output format: json, text"
     class_option :quiet, type: :boolean, default: false, desc: "Suppress non-essential output"