diff --git a/packages/grpc/src/Encoding/Encoder.php b/packages/grpc/src/Encoding/Encoder.php
index 6bbd26e..fdeb2ea 100644
--- a/packages/grpc/src/Encoding/Encoder.php
+++ b/packages/grpc/src/Encoding/Encoder.php
@@ -6,6 +6,7 @@
 
 /**
  * @api
+ * @template T of object = object
  */
 interface Encoder
 {
@@ -17,16 +18,15 @@ interface Encoder
     public function name(): string;
 
     /**
-     * @template T of object
      * @param T $request
      * @throws EncodingFailed
      */
     public function encode(object $request): string;
 
     /**
-     * @template T of object
-     * @param class-string<T> $classType
-     * @return T
+     * @template E of T
+     * @param class-string<E> $classType
+     * @return E
      * @throws DecodingFailed
      */
     public function decode(string $buffer, string $classType): object;