diff --git a/s3-bucket-unique-name.sh b/s3-bucket-unique-name.sh
index 9e666e9..c535412 100644
--- a/s3-bucket-unique-name.sh
+++ b/s3-bucket-unique-name.sh
@@ -22,7 +22,8 @@ sleep 1
 out2=$(echo "$out1$((1 + $RANDOM % 99))$(date)" |sha256sum)
 # include random number from 1-99 to try and prevent collisions
 
-result=$(echo "$prefix-rbn-$out2" |tr ' ' '.' |cut -c 1-$pad)
+# fix for https://www.cloudconformity.com/knowledge-base/aws/S3/dns-compliant-buckets-names.html
+result=$(echo "$prefix-rbn-$out2" |tr ' ' '-' |cut -c 1-$pad)
 
 echo '         1         2         3         4         5         6  6'
 echo '123456789012345678901234567890123456789012345678901234567890123'