Update README.md

[signal-cli] / README.md

diff --git a/README.md b/README.md
index 9d60499c2a69491b2c11d41aaf0364b3cc01bed5..4bd49c17442defff73afcb692ac5995bd24ea743 100644 (file)
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+++ b/README.md
@@ -37,7 +37,9 @@ Important: The USERNAME is your phone number in international format and must in
 
         signal-cli -u USERNAME register
         
 
         signal-cli -u USERNAME register
         

-  You can register Signal using a land line number. In this case you can skip SMS verification process and jump directly to the voice call verification by adding the --voice switch at the end of above register command.
+  You can register Signal using a land line number. In this case you can skip SMS verification process and jump directly to the voice call verification by adding the `--voice` switch at the end of above register command.
+  
+  Registering may require solving a CAPTCHA challenge: [Registration with captcha](https://github.com/AsamK/signal-cli/wiki/Registration-with-captcha)

 
 * Verify the number using the code received via SMS or voice, optionally add `--pin PIN_CODE` if you've added a pin code to your account
 
 
 * Verify the number using the code received via SMS or voice, optionally add `--pin PIN_CODE` if you've added a pin code to your account