diff --git a/contrib/deb/generate.sh b/contrib/deb/generate.sh
index 6be2686..3e59389 100755
--- a/contrib/deb/generate.sh
+++ b/contrib/deb/generate.sh
@@ -113,6 +113,10 @@ if command -v systemctl >/dev/null; then
   systemctl disable alfis || true
 fi
 EOF
+cat > /tmp/$PKGNAME/debian/postrm << EOF
+#!/bin/sh
+rm /var/lib/alfis/blockchain.db
+EOF
 
 sudo cp alfis /tmp/$PKGNAME/usr/bin/
 cp contrib/systemd/*.service /tmp/$PKGNAME/etc/systemd/system/