diff --git a/debian/preinst b/debian/preinst
new file mode 100644
index 0000000..1c9d54c
--- /dev/null
+++ b/debian/preinst
@@ -0,0 +1,24 @@
+#!/bin/sh
+# preinst script for publik-common
+#
+# see: dh_installdeb(1)
+
+set -e
+
+case "$1" in
+    install|upgrade)
+        find /etc/nginx/conf.d/client-max-body-size-10M.conf -delete \;
+    ;;
+    abort-upgrade)
+    ;;
+
+    *)
+        echo "preinst called with unknown argument \`$1'" >&2
+        exit 1
+    ;;
+esac
+
+#DEBHELPER#
+
+exit 0
+