diff --git a/Cargo.lock b/Cargo.lock
index ce57333e..00949a4b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1520,6 +1520,15 @@ version = "1.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7170ef9988bc169ba16dd36a7fa041e5c4cbeb6a35b76d4c03daded371eae7c0"
 
+[[package]]
+name = "portpicker"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "be97d76faf1bfab666e1375477b23fde79eccf0276e9b63b92a39d676a889ba9"
+dependencies = [
+ "rand",
+]
+
 [[package]]
 name = "posthog-core"
 version = "0.1.0"
@@ -1816,6 +1825,7 @@ dependencies = [
  "nix",
  "open",
  "openssl",
+ "portpicker",
  "rand",
  "regex",
  "reqwest",
diff --git a/rivet-toolchain/Cargo.toml b/rivet-toolchain/Cargo.toml
index 2de1c5ee..3f354e28 100644
--- a/rivet-toolchain/Cargo.toml
+++ b/rivet-toolchain/Cargo.toml
@@ -38,6 +38,7 @@ serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
 strum = { version = "0.24", features = ["derive"] }
 sysinfo = "0.30.0"
+portpicker = "0.1"
 tabled = "0.8.0"
 tar = "0.4.40"
 tempfile = "3.2"
diff --git a/rivet-toolchain/src/tasks/backend_choose_local_port.rs b/rivet-toolchain/src/tasks/backend_choose_local_port.rs
new file mode 100644
index 00000000..be230688
--- /dev/null
+++ b/rivet-toolchain/src/tasks/backend_choose_local_port.rs
@@ -0,0 +1,28 @@
+use global_error::prelude::*;
+use serde::{Deserialize, Serialize};
+
+use crate::util::task::TaskCtx;
+
+#[derive(Deserialize)]
+pub struct Input {}
+
+#[derive(Serialize)]
+pub struct Output {
+	pub port: u16,
+}
+
+pub struct Task;
+
+impl super::Task for Task {
+	type Input = Input;
+	type Output = Output;
+
+	fn name() -> &'static str {
+		"backend_choose_local_port"
+	}
+
+	async fn run(_task: TaskCtx, _input: Self::Input) -> GlobalResult<Self::Output> {
+		let port = unwrap!(portpicker::pick_unused_port(), "no free ports");
+		Ok(Output { port })
+	}
+}
diff --git a/rivet-toolchain/src/tasks/backend_dev.rs b/rivet-toolchain/src/tasks/backend_dev.rs
index 214f9a38..f5911a4a 100644
--- a/rivet-toolchain/src/tasks/backend_dev.rs
+++ b/rivet-toolchain/src/tasks/backend_dev.rs
@@ -5,6 +5,7 @@ use crate::{backend, config, util::task::TaskCtx};
 
 #[derive(Deserialize)]
 pub struct Input {
+	pub port: u16,
 	pub cwd: String,
 }
 
@@ -30,6 +31,7 @@ impl super::Task for Task {
 			Ok(env)
 		})
 		.await?;
+		cmd_env.insert("OPENGB_PORT".into(), input.port.to_string());
 		cmd_env.insert("OPENGB_TERM_COLOR".into(), "never".into());
 		let exit_code = backend::run_opengb_command(
 			task.clone(),
diff --git a/rivet-toolchain/src/tasks/mod.rs b/rivet-toolchain/src/tasks/mod.rs
index 63a76987..a2c4df1e 100644
--- a/rivet-toolchain/src/tasks/mod.rs
+++ b/rivet-toolchain/src/tasks/mod.rs
@@ -1,3 +1,4 @@
+pub mod backend_choose_local_port;
 pub mod backend_dev;
 pub mod backend_sdk_gen;
 pub mod check_login_state;
@@ -72,6 +73,7 @@ macro_rules! gen_run_task {
 }
 
 gen_run_task!(
+	backend_choose_local_port::Task,
 	backend_dev::Task,
 	backend_sdk_gen::Task,
 	check_login_state::Task,