diff --git a/sql/delete-old-data.sql b/sql/delete-old-data.sql
index ce5f57b..823be8f 100644
--- a/sql/delete-old-data.sql
+++ b/sql/delete-old-data.sql
@@ -1,4 +1,4 @@
 -- delete data older than one month. It's taking about 18 days to fill a gig, and we have
 -- 3 gig volume currently. That gives us 54 days. But 30 days is plenty and this gives us margin
 -- in case the rate of growth of data increases.
-delete from dataset where sampletime <= unixepoch()-30*24*60*60
+delete from dataset where sampletime <= unixepoch()-45*24*60*60