diff --git a/src/types/inline_keyboard_markup.rs b/src/types/inline_keyboard_markup.rs
index 25618524..76294ddd 100644
--- a/src/types/inline_keyboard_markup.rs
+++ b/src/types/inline_keyboard_markup.rs
@@ -32,25 +32,36 @@ pub struct InlineKeyboardMarkup {
 impl InlineKeyboardMarkup {
     pub fn new<I1, I2>(inline_keyboard: I1) -> Self
     where
-        I1: Into<Vec<I2>>,
-        I2: Into<Vec<InlineKeyboardButton>>,
+        I1: IntoIterator<Item = I2>,
+        I2: IntoIterator<Item = InlineKeyboardButton>,
     {
         Self {
-            inline_keyboard: inline_keyboard.into().into_iter().map(Into::into).collect(),
+            inline_keyboard: inline_keyboard
+                .into_iter()
+                .map(<_>::into_iter)
+                .map(<_>::collect)
+                .collect(),
         }
     }
 
     pub fn inline_keyboard<I1, I2>(mut self, val: I1) -> Self
     where
-        I1: Into<Vec<I2>>,
-        I2: Into<Vec<InlineKeyboardButton>>,
+        I1: IntoIterator<Item = I2>,
+        I2: IntoIterator<Item = InlineKeyboardButton>,
     {
-        self.inline_keyboard = val.into().into_iter().map(Into::into).collect();
+        self.inline_keyboard = val
+            .into_iter()
+            .map(<_>::into_iter)
+            .map(<_>::collect)
+            .collect();
         self
     }
 
-    pub fn append_row(mut self, buttons: Vec<InlineKeyboardButton>) -> Self {
-        self.inline_keyboard.push(buttons);
+    pub fn append_row<R>(mut self, buttons: R) -> Self
+    where
+        R: IntoIterator<Item = InlineKeyboardButton>,
+    {
+        self.inline_keyboard.push(buttons.into_iter().collect());
         self
     }
 
diff --git a/src/types/message_entity.rs b/src/types/message_entity.rs
index 872a1cb7..e9742921 100644
--- a/src/types/message_entity.rs
+++ b/src/types/message_entity.rs
@@ -1,6 +1,6 @@
 use serde::{Deserialize, Serialize};
 
-use crate::types::{Message, User};
+use crate::types::User;
 
 /// This object represents one special entity in a text message.
 ///
diff --git a/src/types/passport_element_error.rs b/src/types/passport_element_error.rs
index da96fba1..c94b6cf2 100644
--- a/src/types/passport_element_error.rs
+++ b/src/types/passport_element_error.rs
@@ -305,11 +305,11 @@ pub struct PassportElementErrorFiles {
 impl PassportElementErrorFiles {
     pub fn new<S>(r#type: PassportElementErrorFilesType, file_hashes: S) -> Self
     where
-        S: Into<Vec<String>>,
+        S: IntoIterator<Item = String>,
     {
         Self {
             r#type,
-            file_hashes: file_hashes.into(),
+            file_hashes: file_hashes.into_iter().collect(),
         }
     }
 
@@ -320,9 +320,9 @@ impl PassportElementErrorFiles {
 
     pub fn file_hashes<S>(mut self, val: S) -> Self
     where
-        S: Into<Vec<String>>,
+        S: IntoIterator<Item = String>,
     {
-        self.file_hashes = val.into();
+        self.file_hashes = val.into_iter().collect();
         self
     }
 }
@@ -386,11 +386,11 @@ pub struct PassportElementErrorTranslationFiles {
 impl PassportElementErrorTranslationFiles {
     pub fn new<S>(r#type: PassportElementErrorTranslationFilesType, file_hashes: S) -> Self
     where
-        S: Into<Vec<String>>,
+        S: IntoIterator<Item = String>,
     {
         Self {
             r#type,
-            file_hashes: file_hashes.into(),
+            file_hashes: file_hashes.into_iter().collect(),
         }
     }
 
@@ -401,9 +401,9 @@ impl PassportElementErrorTranslationFiles {
 
     pub fn file_hashes<S>(mut self, val: S) -> Self
     where
-        S: Into<Vec<String>>,
+        S: IntoIterator<Item = String>,
     {
-        self.file_hashes = val.into();
+        self.file_hashes = val.into_iter().collect();
         self
     }
 }
diff --git a/src/types/reply_keyboard_markup.rs b/src/types/reply_keyboard_markup.rs
index 9289329e..b2e8d3b1 100644
--- a/src/types/reply_keyboard_markup.rs
+++ b/src/types/reply_keyboard_markup.rs
@@ -47,11 +47,15 @@ pub struct ReplyKeyboardMarkup {
 impl ReplyKeyboardMarkup {
     pub fn new<K1, K2>(keyboard: K1) -> Self
     where
-        K1: Into<Vec<K2>>,
-        K2: Into<Vec<KeyboardButton>>,
+        K1: IntoIterator<Item = K2>,
+        K2: IntoIterator<Item = KeyboardButton>,
     {
         Self {
-            keyboard: keyboard.into().into_iter().map(Into::into).collect(),
+            keyboard: keyboard
+                .into_iter()
+                .map(<_>::into_iter)
+                .map(<_>::collect)
+                .collect(),
             resize_keyboard: None,
             one_time_keyboard: None,
             selective: None,
diff --git a/src/types/shipping_option.rs b/src/types/shipping_option.rs
index af154d6b..ec6e8a3e 100644
--- a/src/types/shipping_option.rs
+++ b/src/types/shipping_option.rs
@@ -22,12 +22,12 @@ impl ShippingOption {
     where
         S1: Into<String>,
         S2: Into<String>,
-        P: Into<Vec<LabeledPrice>>,
+        P: IntoIterator<Item = LabeledPrice>,
     {
         Self {
             id: id.into(),
             title: title.into(),
-            prices: prices.into(),
+            prices: prices.into_iter().collect(),
         }
     }
 
@@ -49,9 +49,9 @@ impl ShippingOption {
 
     pub fn prices<P>(mut self, val: P) -> Self
     where
-        P: Into<Vec<LabeledPrice>>,
+        P: IntoIterator<Item = LabeledPrice>,
     {
-        self.prices = val.into();
+        self.prices = val.into_iter().collect();
         self
     }
 }