diff --git a/assimp.spec b/assimp.spec
index 1b11d997f9ab2f087a8a099b5ddaa096a6e9b090..56010b6fb9ada29442e90ee84761fa56e6f611bd 100644
--- a/assimp.spec
+++ b/assimp.spec
@@ -1,6 +1,6 @@
 Name:          assimp
 Version:       3.3.1
-Release:       19
+Release:       20
 Summary:       Library to load and process various 3D model formats into applications.
 License:       BSD and MIT
 URL:           http://assimp.sourceforge.net
@@ -16,7 +16,7 @@ Patch0008:     0001-Apply-mechanism-to-decide-use-for-IrrXML-external-or.patch
 BuildRequires: gcc-c++ boost-devel cmake dos2unix irrlicht-devel irrXML-devel
 BuildRequires: doxygen poly2tri-devel gtest-devel pkgconfig(zzip-zlib-config)
 BuildRequires: pkgconfig(zlib) pkgconfig(minizip) pkgconfig(python2) python2-rpm-macros
-BuildRequires: pkgconfig(ILUT) pkgconfig(python3) python3-rpm-macros
+BuildRequires: pkgconfig(python3) python3-rpm-macros
 Provides:      bundled(polyclipping) = 4.8.8 bundled(openddl-parser)
 
 %description
@@ -116,6 +116,9 @@ install -m 0644 port/PyAssimp/pyassimp/*.py %{buildroot}%{python3_sitelib}/pyass
 %{python3_sitelib}/pyassimp
 
 %changelog
+* Mon Dec 28 2020 wangxiao <wangxiao65@huawei.com> - 3.3.1-20
+- Remove unnessary BuildRequire DevIL
+
 * Wed Sep 9 2020 Ge Wang <wangge20@huawei.com> - 3.3.1-19
 - Modify Source0 Url