diff --git a/import b/import
index 8d498f8..ed44bb2 100755
--- a/import
+++ b/import
@@ -79,7 +79,7 @@ then
 	while read date hour data
 	do
 		data=$(date -d "$date $hour" +%s):${data// /:}
-		rrdtool update "$rrdfile" -t $template "$data" 2>&1
+		rrdtool update "$rrdfile" -t $template "${data//:0/:U}" 2>&1
 	done <<<"${POST["data"]}"
 
 	if [ -n "$CACHE_DIR" ]