diff --git a/migrations/20230426221940_init.up.sql b/migrations/20230426221940_init.up.sql
index 02df49a..7d53573 100644
--- a/migrations/20230426221940_init.up.sql
+++ b/migrations/20230426221940_init.up.sql
@@ -5,7 +5,7 @@
 
 -- users
 create table if not exists witches (
-  id int not null primary key,
+  id blob not null primary key,
   username text not null unique,
   displayname text,
   email text,
diff --git a/src/lib.rs b/src/lib.rs
index b0ff663..6c16c13 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -6,13 +6,3 @@ pub mod generic_handlers;
 pub mod session_store;
 pub(crate) mod templates;
 pub mod users;
-
-pub trait ToBlob {
-    fn blob(&self) -> &[u8];
-}
-
-impl ToBlob for uuid::Uuid {
-    fn blob(&self) -> &[u8] {
-        self.as_bytes().as_slice()
-    }
-}
diff --git a/src/users.rs b/src/users.rs
index c729ccc..63c46e7 100644
--- a/src/users.rs
+++ b/src/users.rs
@@ -11,15 +11,11 @@ use axum::{
     response::{IntoResponse, Response},
 };
 use axum_login::{secrecy::SecretVec, AuthUser, SqliteStore};
-use rand_core::CryptoRngCore;
 use sqlx::{query_as, SqlitePool};
 use unicode_segmentation::UnicodeSegmentation;
 use uuid::Uuid;
 
-use crate::{
-    templates::{CreateUser, LoginGet},
-    ToBlob,
-};
+use crate::templates::{CreateUser, LoginGet};
 
 const CREATE_QUERY: &str =
     "insert into witches (id, username, displayname, email, pwhash) values ($1, $2, $3, $4, $5)";
@@ -28,7 +24,7 @@ const ID_QUERY: &str = "select * from witches where id = $1";
 
 #[derive(Debug, Default, Clone, PartialEq, Eq, sqlx::FromRow)]
 pub struct User {
-    pub id: i64,
+    pub id: Uuid,
     pub username: String,
     pub displayname: Option<String>,
     pub email: Option<String>,
@@ -49,10 +45,10 @@ impl Display for User {
     }
 }
 
-pub type AuthContext = axum_login::extractors::AuthContext<i64, User, SqliteStore<User>>;
+pub type AuthContext = axum_login::extractors::AuthContext<Uuid, User, SqliteStore<User>>;
 
-impl AuthUser<i64> for User {
-    fn get_id(&self) -> i64 {
+impl AuthUser<Uuid> for User {
+    fn get_id(&self) -> Uuid {
         self.id
     }
 
@@ -170,7 +166,7 @@ pub async fn post_create_user(
 
     let user = create_user(username, displayname, email, password, &pool).await?;
     tracing::debug!("created {user:?}");
-    let id = user.id;
+    let id = user.id.as_simple().to_string();
     let location = format!("/signup_success/{id}");
 
     let resp = axum::response::Redirect::temporary(&location).into_response();
@@ -187,7 +183,7 @@ pub async fn handle_signup_success(
         let id = id.trim();
         let id = Uuid::try_parse(id).unwrap_or_default();
         query_as(ID_QUERY)
-            .bind(id.blob())
+            .bind(id)
             .fetch_one(&pool)
             .await
             .unwrap_or_default()
@@ -266,8 +262,7 @@ async fn create_user(
         .unwrap() // safe to unwrap, we know the salt is valid
         .to_string();
 
-    let mut rng = OsRng;
-    let id: i64 = rng.as_rngcore().next_u64() as i64;
+    let id = Uuid::new_v4();
     let res = sqlx::query(CREATE_QUERY)
         .bind(id)
         .bind(username)