diff --git a/debian/preinst b/debian/preinst
index 1db3c39..3130f66 100644
--- a/debian/preinst
+++ b/debian/preinst
@@ -12,6 +12,10 @@ case "$1" in
             rm -f /etc/dconf/db/gdm.d/02-logo
             rm -f /etc/dconf/db/gdm.d/03-smartcard
         fi
+        # in version > 0.6, proxy config was moved to another package
+        if dpkg --compare-versions "$2" le 0.6 ; then
+            rm -f /etc/dconf/db/local.d/01-proxy
+        fi
         ;;
     abort-upgrade)
         ;;