diff --git a/libpng.spec b/libpng.spec
index 0358db46a17fcccced07c05ac96500651769724c..e690452809fb72902d6cfde104bbac492b3c235f 100644
--- a/libpng.spec
+++ b/libpng.spec
@@ -1,7 +1,7 @@
 Name:           libpng
 Epoch:          2
 Version:        1.6.37
-Release:        3
+Release:        4
 Summary:        A library of functions for manipulating PNG image format files
 License:        zlib
 URL:            http://www.libpng.org/pub/png/libpng.html
@@ -86,10 +86,13 @@ make check
 %{_bindir}/*
 
 %files help
-%doc libpng-manual.txt example.c TODO CHANGES
+%doc libpng-manual.txt TODO CHANGES
 %{_mandir}/man*/*
 
 %changelog
+* Thu Dec 15 2022 zhouwenpei <zhouwenpei1@h-partners.com> - 1.6.37-4
+- remove example.c from help
+
 * Tue Mar 29 2022 liuyumeng <liuyumeng5@h-partners.com> - 1.6.37-3
 - enable test and fix failed tests