diff --git a/bootstrap.sh b/bootstrap.sh
index 4ef550d..be180b5 100644
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -26,8 +26,9 @@ function warn
 
 function validate_host
 {
-    echo "$1" | grep -P '^(http|https):\/\/(([a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])\.)*([a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])(:[0-9]+)?$'
+    echo "$1" | grep -P '^(http|https):\/\/(([a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])\.)*([a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])(:[0-9]+)?$' > /dev/null 2>&1
     if [ $? -eq 0 ]; then
+        debug "Checking host is resolvable: $1"
         curl $1 > /dev/null 2>&1
     fi
     return $?