diff --git a/planetwars-server/migrations/2021-12-18-130837_bots/up.sql b/planetwars-server/migrations/2021-12-18-130837_bots/up.sql
index 27f3582..22e250b 100644
--- a/planetwars-server/migrations/2021-12-18-130837_bots/up.sql
+++ b/planetwars-server/migrations/2021-12-18-130837_bots/up.sql
@@ -1,6 +1,6 @@
 CREATE TABLE bots (
     id serial PRIMARY KEY,
-    owner_id integer REFERENCES users(id) NOT NULL,
+    owner_id integer REFERENCES users(id),
     name text NOT NULL
 );
 
diff --git a/planetwars-server/src/db/bots.rs b/planetwars-server/src/db/bots.rs
index 970dcf9..f7d8373 100644
--- a/planetwars-server/src/db/bots.rs
+++ b/planetwars-server/src/db/bots.rs
@@ -7,14 +7,14 @@ use chrono;
 #[derive(Insertable)]
 #[table_name = "bots"]
 pub struct NewBot<'a> {
-    pub owner_id: i32,
+    pub owner_id: Option<i32>,
     pub name: &'a str,
 }
 
 #[derive(Queryable, Debug, PartialEq, Serialize, Deserialize)]
 pub struct Bot {
     pub id: i32,
-    pub owner_id: i32,
+    pub owner_id: Option<i32>,
     pub name: String,
 }
 
diff --git a/planetwars-server/src/routes/bots.rs b/planetwars-server/src/routes/bots.rs
index 5f5d8f5..0edfaa9 100644
--- a/planetwars-server/src/routes/bots.rs
+++ b/planetwars-server/src/routes/bots.rs
@@ -24,7 +24,7 @@ pub async fn create_bot(
     params: Json<BotParams>,
 ) -> (StatusCode, Json<Bot>) {
     let bot_params = bots::NewBot {
-        owner_id: user.id,
+        owner_id: Some(user.id),
         name: &params.name,
     };
     let bot = bots::create_bot(&bot_params, &conn).unwrap();
@@ -71,7 +71,7 @@ pub async fn upload_code_multipart(
 
     let bot = bots::find_bot(bot_id, &conn).map_err(|_| StatusCode::NOT_FOUND)?;
 
-    if user.id != bot.owner_id {
+    if Some(user.id) != bot.owner_id {
         return Err(StatusCode::FORBIDDEN);
     }
 
diff --git a/planetwars-server/src/schema.rs b/planetwars-server/src/schema.rs
index 5e74e85..e67ef3a 100644
--- a/planetwars-server/src/schema.rs
+++ b/planetwars-server/src/schema.rs
@@ -7,7 +7,7 @@ table! {
 
     bots (id) {
         id -> Int4,
-        owner_id -> Int4,
+        owner_id -> Nullable<Int4>,
         name -> Text,
     }
 }