diff --git a/src/main.rs b/src/main.rs
index e9b20f7..55e08e3 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -41,6 +41,9 @@ struct Args {
     /// Generate a TypeScript definition file for roblox-ts users.
     #[arg(short, long)]
     typescript: bool,
+
+    #[arg(short, long)]
+    user_id: u64,
 }
 
 const LOCKFILE_PATH: &str = "asphalt.lock.toml";
@@ -102,7 +105,8 @@ async fn main() {
         }
 
         if asset_id.is_none() {
-            asset_id = Some(upload_asset(path.clone(), asset_type, api_key.clone()).await);
+            asset_id =
+                Some(upload_asset(path.clone(), asset_type, api_key.clone(), args.user_id).await);
             println!("Uploaded {}", style(path_str).green());
         }
 
diff --git a/src/upload.rs b/src/upload.rs
index a7378dd..745410f 100644
--- a/src/upload.rs
+++ b/src/upload.rs
@@ -63,7 +63,12 @@ async fn get_image_id(asset_id: u64) -> u64 {
     id_str.parse::<u64>().unwrap()
 }
 
-pub async fn upload_asset(path: PathBuf, asset_type: AssetType, api_key: String) -> u64 {
+pub async fn upload_asset(
+    path: PathBuf,
+    asset_type: AssetType,
+    api_key: String,
+    user_id: u64,
+) -> u64 {
     let path_str = path.to_str().unwrap();
 
     let create_params = CreateAssetParams {
@@ -74,7 +79,7 @@ pub async fn upload_asset(path: PathBuf, asset_type: AssetType, api_key: String)
             display_name: path_str.to_string(),
             creation_context: AssetCreationContext {
                 creator: AssetCreator::User(AssetUserCreator {
-                    user_id: "9670971".to_string(),
+                    user_id: user_id.to_string(),
                 }),
                 expected_price: None,
             },