diff --git a/lib/Rocket.toml b/lib/Rocket.toml
new file mode 100644
index 0000000..d159607
--- /dev/null
+++ b/lib/Rocket.toml
@@ -0,0 +1,3 @@
+## defaults for _all_ profiles
+[default]
+address = "0.0.0.0"
\ No newline at end of file