diff --git a/cli/certificates/flash.go b/cli/certificates/flash.go
index fee14c94..9ba1662f 100644
--- a/cli/certificates/flash.go
+++ b/cli/certificates/flash.go
@@ -50,7 +50,7 @@ func NewFlashCommand() *cobra.Command {
 		Long:  "Flashes specified certificates to board at specified address.",
 		Example: "" +
 			"  " + os.Args[0] + " certificates flash --fqbn arduino:samd:mkr1000 --address COM10 --url arduino.cc:443 --file /home/me/Digicert.cer\n" +
-			"  " + os.Args[0] + " certificates flash -b arduino:samd:mkr1000 -a COM10 -u arduino.cc:443 -u google.cc:443\n" +
+			"  " + os.Args[0] + " certificates flash -b arduino:samd:mkr1000 -a COM10 -u arduino.cc:443 -u google.com:443\n" +
 			"  " + os.Args[0] + " certificates flash -b arduino:samd:mkr1000 -a COM10 -f /home/me/VeriSign.cer -f /home/me/Digicert.cer\n",
 		Args: cobra.NoArgs,
 		Run:  runFlash,
diff --git a/docs/usage.md b/docs/usage.md
index a0df3972..36a1ead3 100644
--- a/docs/usage.md
+++ b/docs/usage.md
@@ -71,7 +71,7 @@ You can also use the `--format json` flag to parse the output with more ease.
 The tool offers also the ability to flash SSL certificates to a module:
 
 ```
-./arduino-fwuploader certificates flash -b arduino:samd:nano_33_iot" -a COM10 -u arduino.cc:443 -u google.cc:443
+./arduino-fwuploader certificates flash -b arduino:samd:nano_33_iot" -a COM10 -u arduino.cc:443 -u google.com:443
 ```
 
 or you can specify a path to a file with `-f` instead of the URL of the certificate