diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4440d1f..47864d7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 # Telegram Client Change Log
 
-## 1.0.0 under development
+## 1.0.1
+
+- Client request callbacks are now deprecated and will be removed in version 2.0
+
+## 1.0.0
 
 - Initial release.
diff --git a/src/Request/TelegramRequestInterface.php b/src/Request/TelegramRequestInterface.php
index 82b5f95..fe27e96 100644
--- a/src/Request/TelegramRequestInterface.php
+++ b/src/Request/TelegramRequestInterface.php
@@ -30,6 +30,8 @@ public function getData(): array;
     public function getFiles(): array;
 
     /**
+     * @deprecated Will be removed in 2.0
+     *
      * Sets a callback which will be called when the request is successfully finished
      *  Callback must have a such signature: function(
      *      \Psr\Http\Message\ResponseInterface $response, // Telegram API response
@@ -44,6 +46,8 @@ public function getFiles(): array;
     public function onSuccess(?callable $callback): self;
 
     /**
+     * @deprecated Will be removed in 2.0
+     *
      * Returns success callback if it was set
      *
      * @psalm-pure
@@ -53,6 +57,8 @@ public function onSuccess(?callable $callback): self;
     public function getSuccessCallback(): ?callable;
 
     /**
+     * @deprecated Will be removed in 2.0
+     *
      * Sets a callback which will be called when the request is finished with an error
      *  Callback must have a such signature: function(
      *      \Psr\Http\Message\ResponseInterface $response, // Telegram API response
@@ -68,6 +74,8 @@ public function getSuccessCallback(): ?callable;
     public function onError(?callable $callback): self;
 
     /**
+     * @deprecated Will be removed in 2.0
+     *
      * Returns error callback if it was set
      *
      * @psalm-pure