diff --git a/crates/teloxide-core/src/adaptors/throttle/request.rs b/crates/teloxide-core/src/adaptors/throttle/request.rs
index 46235fce..47e7d451 100644
--- a/crates/teloxide-core/src/adaptors/throttle/request.rs
+++ b/crates/teloxide-core/src/adaptors/throttle/request.rs
@@ -202,7 +202,7 @@ where
 
         let retry_after = res.as_ref().err().and_then(<_>::retry_after);
         if let Some(retry_after) = retry_after {
-            let after = retry_after;
+            let after = retry_after.duration();
             let until = Instant::now() + after;
 
             // If we'll retry, we check that worker hasn't died at the start of the loop
diff --git a/crates/teloxide-core/src/adaptors/throttle/worker.rs b/crates/teloxide-core/src/adaptors/throttle/worker.rs
index 4712b22f..7aa42692 100644
--- a/crates/teloxide-core/src/adaptors/throttle/worker.rs
+++ b/crates/teloxide-core/src/adaptors/throttle/worker.rs
@@ -316,7 +316,7 @@ async fn freeze(
                     match chat.slow_mode_delay() {
                         Some(delay) => {
                             let now = Instant::now();
-                            let new_delay = Duration::from_secs(delay.into());
+                            let new_delay = delay.duration();
                             slow_mode.insert(hash, (new_delay, now));
                         }
                         None => {
diff --git a/crates/teloxide-core/src/errors.rs b/crates/teloxide-core/src/errors.rs
index 69fecdeb..95c1e765 100644
--- a/crates/teloxide-core/src/errors.rs
+++ b/crates/teloxide-core/src/errors.rs
@@ -1,10 +1,10 @@
 //! Possible error types.
 
-use std::{io, time::Duration};
+use std::io;
 
 use thiserror::Error;
 
-use crate::types::ResponseParameters;
+use crate::types::{ChatId, ResponseParameters, Seconds};
 
 /// An error caused by sending a request to Telegram.
 #[derive(Debug, Error)]
@@ -16,13 +16,12 @@ pub enum RequestError {
     /// The group has been migrated to a supergroup with the specified
     /// identifier.
     #[error("The group has been migrated to a supergroup with ID #{0}")]
-    // FIXME: change to `ChatId` :|
-    MigrateToChatId(i64),
+    MigrateToChatId(ChatId),
 
     /// In case of exceeding flood control, the number of seconds left to wait
     /// before the request can be repeated.
-    #[error("Retry after {0:?}")]
-    RetryAfter(Duration),
+    #[error("Retry after {0}")]
+    RetryAfter(Seconds),
 
     /// Network error while sending a request to Telegram.
     #[error("A network error: {0}")]
@@ -64,14 +63,14 @@ pub enum DownloadError {
 pub trait AsResponseParameters {
     fn response_parameters(&self) -> Option<ResponseParameters>;
 
-    fn retry_after(&self) -> Option<Duration> {
+    fn retry_after(&self) -> Option<Seconds> {
         self.response_parameters().and_then(|rp| match rp {
             ResponseParameters::RetryAfter(n) => Some(n),
             _ => None,
         })
     }
 
-    fn migrate_to_chat_id(&self) -> Option<i64> {
+    fn migrate_to_chat_id(&self) -> Option<ChatId> {
         self.response_parameters().and_then(|rp| match rp {
             ResponseParameters::MigrateToChatId(id) => Some(id),
             _ => None,
diff --git a/crates/teloxide-core/src/net/request.rs b/crates/teloxide-core/src/net/request.rs
index b990e588..dc9c5a88 100644
--- a/crates/teloxide-core/src/net/request.rs
+++ b/crates/teloxide-core/src/net/request.rs
@@ -162,7 +162,7 @@ where
 
 #[cfg(test)]
 mod tests {
-    use std::time::Duration;
+    use crate::types::{ChatId, Seconds};
 
     use cool_asserts::assert_matches;
 
@@ -194,7 +194,7 @@ mod tests {
         let json = r#"{"ok":false,"description":"this string is ignored","parameters":{"migrate_to_chat_id":123456}}"#.to_owned();
 
         let res = deserialize_response::<True>(json);
-        assert_matches!(res, Err(RequestError::MigrateToChatId(123456)));
+        assert_matches!(res, Err(RequestError::MigrateToChatId(ChatId(123456))));
     }
 
     #[test]
@@ -202,7 +202,7 @@ mod tests {
         let json = r#"{"ok":false,"description":"this string is ignored","parameters":{"retry_after":123456}}"#.to_owned();
 
         let res = deserialize_response::<True>(json);
-        assert_matches!(res, Err(RequestError::RetryAfter(duration)) if duration == Duration::from_secs(123456));
+        assert_matches!(res, Err(RequestError::RetryAfter(duration)) if duration == Seconds::from_seconds(123456));
     }
 
     #[test]