diff --git a/tools/data_run.sh b/tools/data_run.sh
index ca6f568e..c5472778 100755
--- a/tools/data_run.sh
+++ b/tools/data_run.sh
@@ -81,7 +81,7 @@ TOTAL_RUNS=`./datastore/manage.py list_datagetter_runs --total`
 
 if [ $TOTAL_RUNS -gt $MAX_TOTAL_RUNS_IN_DB ]; then
     echo_stamp "Delete oldest datagetter data"
-    ./datastore/manage.py delete_datagetter_data --oldest --no-prompt
+    ./datastore/manage.py delete_datagetter_data --older-than-days 31 --no-prompt
 fi
 
 echo_stamp "Deleting old GrantNav packages"