diff --git a/UPGRADE.md b/UPGRADE.md
index 68817dd..f2f053c 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -2,3 +2,4 @@
 
 - The class `FileSystem` was renamed `NativeFileSystem`. `FileSystem` is now an
   interface.
+- Deprecated the `::getFileContents()` method in favour of the `::readFile()`.
diff --git a/src/FileSystem.php b/src/FileSystem.php
index cff95fb..ba048fc 100644
--- a/src/FileSystem.php
+++ b/src/FileSystem.php
@@ -66,13 +66,10 @@ public function escapePath(string $path): string;
     public function dumpFile(string $filename, $content = ''): void;
 
     /**
-     * Gets the contents of a file.
-     *
-     * @param string $file File path
+     * @deprecated Use the `::readFile()` method. Deprecated since 2.0 and it will be removed in 3.0.
+     * @see readFile
      *
      * @throws IOException If the file cannot be read
-     *
-     * @return string File contents
      */
     public function getFileContents(string $file): string;