diff --git a/.sums b/.sums
new file mode 100644
index 0000000..234e7ae
--- /dev/null
+++ b/.sums
@@ -0,0 +1 @@
+dbfbf6b3987f9fb0f75b46515769394a  party.db
diff --git a/run.sh b/run.sh
index 29678ba..9cb0e8e 100755
--- a/run.sh
+++ b/run.sh
@@ -3,8 +3,13 @@
 python -c "import qrcode"
 if [ $? -eq 1 ]; then
 	pip install qrcode
-else
-cat party.sql | sqlite3 party.db
+fi
+
+md5sum -c .sums
+if [ $? -eq 1 ]; then
+	rm party.db
+	cat party.sql | sqlite3 party.db
+fi
 
 export FLASK_APP=main.py