diff --git a/cli_handlers.go b/cli_handlers.go
index 4ab2e32ab..0ef89441a 100644
--- a/cli_handlers.go
+++ b/cli_handlers.go
@@ -61,6 +61,10 @@ func setup(c *cli.Context) (*Configuration, *Account, *acme.Client) {
 		}
 
 		client.SetChallengeProvider(acme.HTTP01, provider)
+		
+		// --webroot=foo indicates that the user specifically want to do a HTTP challenge
+		// infer that the user also wants to exclude all other challenges
+		client.ExcludeChallenges([]acme.Challenge{acme.DNS01, acme.TLSSNI01})
 	}
 	if c.GlobalIsSet("http") {
 		if strings.Index(c.GlobalString("http"), ":") == -1 {