diff --git a/update-NebulaNodeCert b/update-NebulaNodeCert
index 0de82be..2a4f5a8 100644
--- a/update-NebulaNodeCert
+++ b/update-NebulaNodeCert
@@ -39,7 +39,7 @@ NODEGROUPS=($(${NEBULACERTBINPATH} print -path ${CERTPATH} -json | jq -s --compa
 CERTISCASTATUS=$(${NEBULACERTBINPATH} print -path ${CERTPATH} -json | jq -s --compact-output .[].details.isCa)
 
 # Create new file name variable
-NEWFILENAME="${NODENAME}-${DATETIME}"
+NEWFILENAME="${NODENAME}_${DATETIME}"
 
 if [[ $CERTISCASTATUS == true ]]; then
     echo "Certificate is the root CA Certificate. Try again with a node certificate."