diff --git a/Cargo.lock b/Cargo.lock
index f4f4f42a6..04f9ea564 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -779,7 +779,7 @@ dependencies = [
 
 [[package]]
 name = "dsc-bicep-ext"
-version = "0.1.0"
+version = "0.1.1"
 dependencies = [
  "async-stream",
  "clap",
diff --git a/dsc-bicep-ext/Cargo.toml b/dsc-bicep-ext/Cargo.toml
index d930002af..69d8def58 100644
--- a/dsc-bicep-ext/Cargo.toml
+++ b/dsc-bicep-ext/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "dsc-bicep-ext"
-version = "0.1.0"
+version = "0.1.1"
 edition = "2024"
 
 [[bin]]
diff --git a/dsc-bicep-ext/locales/en-us.toml b/dsc-bicep-ext/locales/en-us.toml
index c0c0957f9..eed2a949b 100644
--- a/dsc-bicep-ext/locales/en-us.toml
+++ b/dsc-bicep-ext/locales/en-us.toml
@@ -4,4 +4,5 @@ _version = 1
 functionCalled = "Bicep gRPC '%{function}' called for '%{resourceType}@%{version}': '%{properties}'"
 serverStarting = "Starting Bicep gRPC server on %{transport}: %{address}"
 serverError = "Bicep gRPC server error: %{error}"
+transportNotSpecified = "Transport not specified"
 waitForDebugger = "Press any key to continue after attaching to PID: {pid}"
diff --git a/dsc-bicep-ext/src/main.rs b/dsc-bicep-ext/src/main.rs
index ffbe56a5f..746ded95e 100644
--- a/dsc-bicep-ext/src/main.rs
+++ b/dsc-bicep-ext/src/main.rs
@@ -460,8 +460,9 @@ async fn run_server(
         return Ok(());
     }
 
-    // Default to HTTP server on [::1]:50051 if no transport specified
-    let addr = http.unwrap_or_else(|| "[::1]:50051".to_string());
+    let Some(addr) = http else {
+        return Err(Box::new(std::io::Error::other(t!("bicep.transportNotSpecified").to_string())));
+    };
     tracing::info!(
         "{}",
         t!(