diff --git a/lib/Client/Protocol/Command/Argument/FetchOptions.php b/lib/Client/Protocol/Command/Argument/FetchOptions.php
index 2006600..ef5ccb0 100644
--- a/lib/Client/Protocol/Command/Argument/FetchOptions.php
+++ b/lib/Client/Protocol/Command/Argument/FetchOptions.php
@@ -57,7 +57,7 @@ final class FetchOptions
 
     public function withHeaders(): self
     {
-        return $this->with('BODY[HEADER]');
+        return $this->with('BODY.PEEK[HEADER]');
     }
 
     public function withHeader(string ...$fields): self
@@ -86,12 +86,12 @@ final class FetchOptions
 
     public function withBodyText(): self
     {
-        return $this->with('BODY[TEXT]');
+        return $this->with('BODY.PEEK[TEXT]');
     }
 
     public function withBody(): self
     {
-        return $this->with('BODY[]');
+        return $this->with('BODY.PEEK[]');
     }
 
     public function withBodySection(string $section): self
@@ -102,7 +102,7 @@ final class FetchOptions
             return $this;
         }
 
-        return $this->with(sprintf('BODY[%s]', $section));
+        return $this->with(sprintf('BODY.PEEK[%s]', $section));
     }
 
     public function with(string $item): self
diff --git a/lib/Client/Protocol/CommandExecutor.php b/lib/Client/Protocol/CommandExecutor.php
index a7276a0..e1028ce 100644
--- a/lib/Client/Protocol/CommandExecutor.php
+++ b/lib/Client/Protocol/CommandExecutor.php
@@ -68,7 +68,7 @@ final class CommandExecutor
 
         $tag = $this->tags->next();
         $this->writer->write($tag, new RequestFrame(sprintf(
-            'UID FETCH %s (UID BODY[%s])',
+            'UID FETCH %s (UID BODY.PEEK[%s])',
             $target->sequenceSet()->toCommand(),
             $section,
         )));