diff --git a/src/api.rs b/src/api.rs
index df47eeb..51bd38a 100644
--- a/src/api.rs
+++ b/src/api.rs
@@ -1,44 +1,38 @@
-use std::{collections::HashMap, iter::repeat, sync::Arc};
+use std::{
+    collections::HashMap,
+    iter::repeat,
+    sync::{Arc, Mutex},
+};
 
 use anyhow::{Context as _, anyhow};
 use immich_sdk::{AssetId, AssetVisibility};
-use kameo::{
-    Actor,
-    prelude::{Context, Message},
-};
 use slint::{Rgba8Pixel, SharedPixelBuffer};
 
 use crate::thumbhash::thumbhashes_to_pixels;
 
 pub type TimeBucketKey = String;
 
-#[derive(Actor)]
 pub struct Api {
     client: immich_sdk::Client,
-    buckets: HashMap<TimeBucketKey, Arc<TimeBucket>>,
-    thumbnails: HashMap<AssetId, Arc<AssetThumbnail>>, // TODO
+    buckets: Mutex<HashMap<TimeBucketKey, Arc<TimeBucket>>>,
+    thumbnails: Mutex<HashMap<AssetId, Arc<AssetThumbnail>>>,
 }
 
 impl Api {
-    pub fn new(client: immich_sdk::Client) -> Self {
-        Self {
+    pub fn new(client: immich_sdk::Client) -> Arc<Self> {
+        Arc::new(Self {
             client,
             buckets: Default::default(),
             thumbnails: Default::default(),
-        }
+        })
     }
 }
 
-pub struct GetTimeBuckets;
 pub struct TimeBucketRef {
     pub key: TimeBucketKey,
     pub count: usize,
 }
 
-pub struct GetTimeBucket {
-    pub time_bucket: TimeBucketKey,
-}
-
 pub struct TimeBucket {
     pub key: TimeBucketKey,
     pub entries: Arc<[TimeBucketEntry]>,
@@ -54,23 +48,13 @@ pub struct TimeBucketEntry {
     pub visibility: AssetVisibility,
 }
 
-pub struct GetAssetThumbnail {
-    pub id: AssetId,
-}
-
 pub struct AssetThumbnail {
     pub id: AssetId,
     pub thumbnail: SharedPixelBuffer<Rgba8Pixel>,
 }
 
-impl Message<GetTimeBuckets> for Api {
-    type Reply = anyhow::Result<Arc<[TimeBucketRef]>>;
-
-    async fn handle(
-        &mut self,
-        _msg: GetTimeBuckets,
-        _ctx: &mut Context<Self, Self::Reply>,
-    ) -> Self::Reply {
+impl Api {
+    pub async fn get_time_buckets(&self) -> anyhow::Result<Vec<TimeBucketRef>> {
         let buckets = self
             .client
             .timeline()
@@ -90,30 +74,22 @@ impl Message<GetTimeBuckets> for Api {
             })
             .collect())
     }
-}
 
-impl Message<GetTimeBucket> for Api {
-    type Reply = anyhow::Result<Arc<TimeBucket>>;
-
-    async fn handle(
-        &mut self,
-        msg: GetTimeBucket,
-        _ctx: &mut Context<Self, Self::Reply>,
-    ) -> Self::Reply {
-        if let Some(time_bucket) = self.buckets.get(&msg.time_bucket).cloned() {
+    pub async fn get_time_bucket(
+        &self,
+        time_bucket: TimeBucketKey,
+    ) -> anyhow::Result<Arc<TimeBucket>> {
+        if let Some(time_bucket) = self.buckets.lock().unwrap().get(&time_bucket).cloned() {
             return Ok(time_bucket);
         }
 
         let bucket = self
             .client
             .timeline()
-            .bucket(&msg.time_bucket)
+            .bucket(&time_bucket)
             .execute()
             .await
-            .context(anyhow!(
-                "Failed to fetch time bucket {:?}",
-                &msg.time_bucket
-            ))
+            .context(anyhow!("Failed to fetch time bucket {:?}", &time_bucket))
             .inspect_err(|e| {
                 tracing::error!("{e:?}");
             })?;
@@ -144,40 +120,38 @@ impl Message<GetTimeBucket> for Api {
             .collect();
 
         let bucket = Arc::new(TimeBucket {
-            key: msg.time_bucket,
+            key: time_bucket,
             entries,
         });
 
-        self.buckets.insert(bucket.key.clone(), bucket.clone());
+        self.buckets
+            .lock()
+            .unwrap()
+            .insert(bucket.key.clone(), bucket.clone());
 
         Ok(bucket)
     }
-}
 
-impl Message<GetAssetThumbnail> for Api {
-    type Reply = anyhow::Result<Arc<AssetThumbnail>>;
-
-    async fn handle(
-        &mut self,
-        msg: GetAssetThumbnail,
-        _ctx: &mut Context<Self, Self::Reply>,
-    ) -> Self::Reply {
-        if let Some(thumbnail) = self.thumbnails.get(&msg.id).cloned() {
+    pub async fn get_asset_thumbnail(
+        &self,
+        asset_id: AssetId,
+    ) -> anyhow::Result<Arc<AssetThumbnail>> {
+        if let Some(thumbnail) = self.thumbnails.lock().unwrap().get(&asset_id).cloned() {
             return Ok(thumbnail);
         }
 
         let response = self
             .client
             .assets()
-            .thumbnail(msg.id)
+            .thumbnail(asset_id)
             .size(immich_sdk::AssetMediaSize::Thumbnail)
             .execute()
             .await
-            .context(anyhow!("Failed to get asset thumbnail for {}", msg.id))?;
+            .context(anyhow!("Failed to get asset thumbnail for {asset_id}"))?;
 
         let thumbnail = response
             .decode()
-            .context(anyhow!("Failed to decode asset thumbnail for {}", msg.id))?
+            .context(anyhow!("Failed to decode asset thumbnail for {asset_id}"))?
             .into_rgba8();
 
         let pixel_buffer = SharedPixelBuffer::<Rgba8Pixel>::clone_from_slice(
@@ -187,11 +161,14 @@ impl Message<GetAssetThumbnail> for Api {
         );
 
         let thumbnail = Arc::new(AssetThumbnail {
-            id: msg.id,
+            id: asset_id,
             thumbnail: pixel_buffer,
         });
 
-        self.thumbnails.insert(msg.id, Arc::clone(&thumbnail));
+        self.thumbnails
+            .lock()
+            .unwrap()
+            .insert(asset_id, Arc::clone(&thumbnail));
 
         Ok(thumbnail)
     }
diff --git a/src/main.rs b/src/main.rs
index c5c8964..672631b 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,11 +1,10 @@
 // Prevent console window in addition to Slint window in Windows release builds when, e.g., starting the app via file manager. Ignored on other platforms.
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
-use std::{mem, ops::Deref};
+use std::{mem, ops::Deref, sync::Arc};
 
 use clap::Parser;
 use immich_sdk::AssetId;
-use kameo::actor::{ActorRef, Spawn};
 use slint::{
     ComponentHandle as _, Model, ModelRc, SharedPixelBuffer, SharedString, ToSharedString,
     VecModel, Weak,
@@ -13,7 +12,7 @@ use slint::{
 use tracing::Level;
 
 use crate::{
-    api::{Api, GetAssetThumbnail, GetTimeBucket, GetTimeBuckets, TimeBucketKey},
+    api::{Api, TimeBucketKey},
     ui::{AppWindow, ImageBucket},
 };
 
@@ -66,8 +65,7 @@ fn main() -> anyhow::Result<()> {
 
     let immich_config =
         immich_sdk::Config::new(opt.immich_base_url).with_api_key(opt.immich_api_key);
-    let api = Api::new(immich_sdk::Client::new(immich_config).unwrap());
-    let api_ = Api::spawn(api);
+    let api_ = Api::new(immich_sdk::Client::new(immich_config).unwrap());
 
     let app = ui::AppWindow::new()?;
     let global = app.global::<ui::Global>();
@@ -76,7 +74,7 @@ fn main() -> anyhow::Result<()> {
     let app_weak = app.as_weak();
     let api = api_.clone();
     tokio::spawn(async move {
-        let Ok(buckets) = api.ask(GetTimeBuckets).await else {
+        let Ok(buckets) = api.get_time_buckets().await else {
             return;
         };
 
@@ -132,7 +130,7 @@ fn main() -> anyhow::Result<()> {
     Ok(())
 }
 
-fn calculate_timeline_visibility(app: &AppWindow, api: ActorRef<Api>, scroll: f32) {
+fn calculate_timeline_visibility(app: &AppWindow, api: Arc<Api>, scroll: f32) {
     let global = app.global::<ui::Global>();
     global.set_timeline_scroll(scroll);
 
@@ -178,7 +176,7 @@ fn calculate_timeline_visibility(app: &AppWindow, api: ActorRef<Api>, scroll: f3
     }
 }
 
-fn calculate_timeline_layout(app: &AppWindow, api: ActorRef<Api>, timeline_width: f32) {
+fn calculate_timeline_layout(app: &AppWindow, api: Arc<Api>, timeline_width: f32) {
     let global = app.global::<ui::Global>();
     let min_image_size = global.get_min_image_size();
     let image_margin = global.get_image_margin();
@@ -267,14 +265,9 @@ fn unload_bucket(time_bucket: &TimeBucketKey, app: &AppWindow) {
     // TODO: write `bucket` into `buckets?`
 }
 
-fn load_bucket(time_bucket: TimeBucketKey, app_weak: Weak<AppWindow>, api: ActorRef<Api>) {
+fn load_bucket(time_bucket: TimeBucketKey, app_weak: Weak<AppWindow>, api: Arc<Api>) {
     tokio::spawn(async move {
-        let Ok(api_bucket) = api
-            .ask(GetTimeBucket {
-                time_bucket: time_bucket.clone(),
-            })
-            .await
-        else {
+        let Ok(api_bucket) = api.get_time_bucket(time_bucket.clone()).await else {
             return;
         };
 
@@ -312,13 +305,13 @@ fn load_bucket(time_bucket: TimeBucketKey, app_weak: Weak<AppWindow>, api: Actor
 
 fn load_thumbnail(
     time_bucket: TimeBucketKey,
-    id: AssetId,
+    asset_id: AssetId,
     app_weak: Weak<AppWindow>,
-    api: ActorRef<Api>,
+    api: Arc<Api>,
 ) {
     tokio::spawn(async move {
-        tracing::debug!("Fetching thumbnail for {id}");
-        let thumbnail = match api.ask(GetAssetThumbnail { id }).await {
+        tracing::debug!("Fetching thumbnail for {asset_id}");
+        let thumbnail = match api.get_asset_thumbnail(asset_id).await {
             Ok(thumbnail) => thumbnail,
             Err(e) => {
                 tracing::error!("{e:?}");
@@ -333,7 +326,7 @@ fn load_thumbnail(
             };
             let bucket = buckets.row_data(i).expect("i is in the list");
 
-            let id_str = id.to_string();
+            let id_str = asset_id.to_string();
             let Some(i) = bucket.previews.iter().position(|p| &p.asset_id == &id_str) else {
                 return;
             };