diff --git a/deltachat-jsonrpc/src/api/types/events.rs b/deltachat-jsonrpc/src/api/types/events.rs
index beeee4334..b4391ce16 100644
--- a/deltachat-jsonrpc/src/api/types/events.rs
+++ b/deltachat-jsonrpc/src/api/types/events.rs
@@ -271,7 +271,7 @@ pub enum EventType {
         /// Progress.
         ///
         /// 0=error, 1-999=progress in permille, 1000=success and done
-        progress: usize,
+        progress: u16,
 
         /// Progress comment or error, something to display to the user.
         comment: Option<String>,
@@ -282,7 +282,7 @@ pub enum EventType {
     #[serde(rename_all = "camelCase")]
     ImexProgress {
         /// 0=error, 1-999=progress in permille, 1000=success and done
-        progress: usize,
+        progress: u16,
     },
 
     /// A file has been exported. A file has been written by imex().
@@ -313,7 +313,7 @@ pub enum EventType {
         chat_id: u32,
 
         /// Progress, always 1000.
-        progress: usize,
+        progress: u16,
     },
 
     /// Progress information of a secure-join handshake from the view of the joiner
@@ -329,7 +329,7 @@ pub enum EventType {
         /// 400=vg-/vc-request-with-auth sent, typically shown as "alice@addr verified, introducing myself."
         /// (Bob has verified alice and waits until Alice does the same for him)
         /// 1000=vg-member-added/vc-contact-confirm received
-        progress: usize,
+        progress: u16,
     },
 
     /// The connectivity to the server changed.
diff --git a/src/events/payload.rs b/src/events/payload.rs
index f2540bce1..5578f9841 100644
--- a/src/events/payload.rs
+++ b/src/events/payload.rs
@@ -243,7 +243,7 @@ pub enum EventType {
         /// Progress.
         ///
         /// 0=error, 1-999=progress in permille, 1000=success and done
-        progress: usize,
+        progress: u16,
 
         /// Progress comment or error, something to display to the user.
         comment: Option<String>,
@@ -253,7 +253,7 @@ pub enum EventType {
     ///
     /// @param data1 (usize) 0=error, 1-999=progress in permille, 1000=success and done
     /// @param data2 0
-    ImexProgress(usize),
+    ImexProgress(u16),
 
     /// A file has been exported. A file has been written by imex().
     /// This event may be sent multiple times by a single call to imex().
@@ -280,7 +280,7 @@ pub enum EventType {
         chat_type: Chattype,
 
         /// Progress, always 1000.
-        progress: usize,
+        progress: u16,
     },
 
     /// Progress information of a secure-join handshake from the view of the joiner
@@ -295,7 +295,7 @@ pub enum EventType {
         /// 400=vg-/vc-request-with-auth sent, typically shown as "alice@addr verified, introducing myself."
         /// (Bob has verified alice and waits until Alice does the same for him)
         /// 1000=vg-member-added/vc-contact-confirm received
-        progress: usize,
+        progress: u16,
     },
 
     /// The connectivity to the server changed.
diff --git a/src/imex.rs b/src/imex.rs
index 30b74ecff..261e76c27 100644
--- a/src/imex.rs
+++ b/src/imex.rs
@@ -271,7 +271,7 @@ struct ProgressReader<R> {
     file_size: u64,
 
     /// Last progress emitted to avoid emitting the same progress value twice.
-    last_progress: usize,
+    last_progress: u16,
 
     /// Context for emitting progress events.
     context: Context,
@@ -306,7 +306,7 @@ where
                 .read
                 .saturating_add(usize_to_u64(buf.filled().len() - before));
 
-            let progress = std::cmp::min(1000 * *this.read / *this.file_size, 999) as usize;
+            let progress = std::cmp::min(1000 * *this.read / *this.file_size, 999) as u16;
             if progress > *this.last_progress {
                 this.context.emit_event(EventType::ImexProgress(progress));
                 *this.last_progress = progress;
@@ -500,7 +500,7 @@ struct ProgressWriter<W> {
     file_size: u64,
 
     /// Last progress emitted to avoid emitting the same progress value twice.
-    last_progress: usize,
+    last_progress: u16,
 
     /// Context for emitting progress events.
     context: Context,
@@ -532,7 +532,7 @@ where
         if let std::task::Poll::Ready(Ok(written)) = res {
             *this.written = this.written.saturating_add(usize_to_u64(written));
 
-            let progress = std::cmp::min(1000 * *this.written / *this.file_size, 999) as usize;
+            let progress = std::cmp::min(1000 * *this.written / *this.file_size, 999) as u16;
             if progress > *this.last_progress {
                 this.context.emit_event(EventType::ImexProgress(progress));
                 *this.last_progress = progress;
diff --git a/src/securejoin.rs b/src/securejoin.rs
index 4b2b35ad1..dcf418708 100644
--- a/src/securejoin.rs
+++ b/src/securejoin.rs
@@ -567,7 +567,7 @@ pub(crate) async fn handle_securejoin_handshake(
         "vc-contact-confirm" => {
             context.emit_event(EventType::SecurejoinJoinerProgress {
                 contact_id,
-                progress: JoinerProgress::Succeeded.to_usize(),
+                progress: JoinerProgress::Succeeded.into_u16(),
             });
             Ok(HandshakeMessage::Ignore)
         }
@@ -590,7 +590,7 @@ pub(crate) async fn handle_securejoin_handshake(
 
             context.emit_event(EventType::SecurejoinJoinerProgress {
                 contact_id,
-                progress: JoinerProgress::Succeeded.to_usize(),
+                progress: JoinerProgress::Succeeded.into_u16(),
             });
             Ok(HandshakeMessage::Propagate)
         }
diff --git a/src/securejoin/bob.rs b/src/securejoin/bob.rs
index 7318d1e7a..40bde884a 100644
--- a/src/securejoin/bob.rs
+++ b/src/securejoin/bob.rs
@@ -94,7 +94,7 @@ pub(super) async fn start_protocol(context: &Context, invite: QrInvite) -> Resul
             // Even if Alice is not verified, we don't send anything.
             context.emit_event(EventType::SecurejoinJoinerProgress {
                 contact_id: invite.contact_id(),
-                progress: JoinerProgress::Succeeded.to_usize(),
+                progress: JoinerProgress::Succeeded.into_u16(),
             });
             return Ok(joining_chat_id);
         } else if has_key
@@ -113,7 +113,7 @@ pub(super) async fn start_protocol(context: &Context, invite: QrInvite) -> Resul
 
             context.emit_event(EventType::SecurejoinJoinerProgress {
                 contact_id: invite.contact_id(),
-                progress: JoinerProgress::RequestWithAuthSent.to_usize(),
+                progress: JoinerProgress::RequestWithAuthSent.into_u16(),
             });
         } else {
             send_handshake_message(context, &invite, private_chat_id, BobHandshakeMsg::Request)
@@ -240,7 +240,7 @@ pub(super) async fn handle_auth_required(
 
         context.emit_event(EventType::SecurejoinJoinerProgress {
             contact_id: invite.contact_id(),
-            progress: JoinerProgress::RequestWithAuthSent.to_usize(),
+            progress: JoinerProgress::RequestWithAuthSent.into_u16(),
         });
 
         auth_sent = true;
@@ -406,8 +406,7 @@ pub(crate) enum JoinerProgress {
 }
 
 impl JoinerProgress {
-    #[expect(clippy::wrong_self_convention)]
-    pub(crate) fn to_usize(self) -> usize {
+    pub(crate) fn into_u16(self) -> u16 {
         match self {
             JoinerProgress::RequestWithAuthSent => 400,
             JoinerProgress::Succeeded => 1000,