diff --git a/Cargo.toml b/Cargo.toml
index 4651841..e750347 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -200,6 +200,11 @@ name = "multiple_plugins_ruby"
 path = "examples/ruby/multiple_plugins.rs"
 required-features = ["ruby"]
 
+[[example]]
+name = "promises_ruby"
+path = "examples/ruby/promises.rs"
+required-features = ["ruby"]
+
 [dev-dependencies]
 tracing-subscriber = "0.3.18"
 mlua = { version = "0.9.8", features = ["luajit", "vendored", "send"] }
diff --git a/assets/examples/ruby/promises.rb b/assets/examples/ruby/promises.rb
new file mode 100644
index 0000000..dd0ecbe
--- /dev/null
+++ b/assets/examples/ruby/promises.rb
@@ -0,0 +1,3 @@
+get_player_name.and_then do |name|
+  puts name
+end
diff --git a/examples/ruby/multiple_plugins.rs b/examples/ruby/multiple_plugins.rs
index 886fee1..59438fd 100644
--- a/examples/ruby/multiple_plugins.rs
+++ b/examples/ruby/multiple_plugins.rs
@@ -17,7 +17,7 @@ impl Plugin for PluginA {
 
 fn plugin_a_startup(mut commands: Commands, assets_server: Res<AssetServer>) {
     commands.spawn(Script::<RubyScript>::new(
-        assets_server.load("examples/lua/multiple_plugins_plugin_a.lua"),
+        assets_server.load("examples/ruby/multiple_plugins_plugin_a.rb"),
     ));
 }
 
diff --git a/examples/ruby/promises.rs b/examples/ruby/promises.rs
new file mode 100644
index 0000000..1b3ed62
--- /dev/null
+++ b/examples/ruby/promises.rs
@@ -0,0 +1,31 @@
+use bevy::prelude::*;
+use bevy_scriptum::prelude::*;
+use bevy_scriptum::runtimes::ruby::prelude::*;
+
+#[derive(Component)]
+struct Player;
+
+fn main() {
+    App::new()
+        .add_plugins(DefaultPlugins)
+        .add_scripting::<RubyRuntime>(|builder| {
+            builder.add_function(
+                String::from("get_player_name"),
+                |player_names: Query<&Name, With<Player>>| {
+                    player_names
+                        .single()
+                        .expect("Missing player_names")
+                        .to_string()
+                },
+            );
+        })
+        .add_systems(Startup, startup)
+        .run();
+}
+
+fn startup(mut commands: Commands, assets_server: Res<AssetServer>) {
+    commands.spawn((Player, Name::new("John")));
+    commands.spawn(Script::<RubyScript>::new(
+        assets_server.load("examples/ruby/promises.rb"),
+    ));
+}