diff --git a/bootstrap.sh b/bootstrap.sh
index be180b5..bb027e7 100644
--- a/bootstrap.sh
+++ b/bootstrap.sh
@@ -29,7 +29,8 @@ function validate_host
     echo "$1" | grep -P '^(http|https):\/\/(([a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])\.)*([a-z0-9]|[a-z0-9][a-z0-9\-]*[a-z0-9])(:[0-9]+)?$' > /dev/null 2>&1
     if [ $? -eq 0 ]; then
         debug "Checking host is resolvable: $1"
-        curl $1 > /dev/null 2>&1
+        # The remote servers may sometimes have self-signed certs
+        curl --insecure $1 > /dev/null 2>&1
     fi
     return $?
 }