diff --git a/tools/u_boot_pylib/README.rst b/tools/u_boot_pylib/README.rst
index 93858f5571d..36a18256d8b 100644
--- a/tools/u_boot_pylib/README.rst
+++ b/tools/u_boot_pylib/README.rst
@@ -1,7 +1,7 @@
 .. SPDX-License-Identifier: GPL-2.0+
 
 # U-Boot Python Library
-=====================
+=======================
 
 This is a Python library used by various U-Boot tools, including patman,
 buildman and binman.