diff --git a/sigil.spec b/sigil.spec
index cc2afb0..455ca73 100644
--- a/sigil.spec
+++ b/sigil.spec
@@ -45,7 +45,7 @@ BuildRequires:  make
 BuildRequires:  pkgconfig
 # not need for build, only check for exists
 # upstream use for python3-Pillow 7.1.2
-BuildRequires:  python3-Pillow >= 7.1.2
+BuildRequires:  python3-Pillow >= 5.0.0
 # upstream use python3-certifi 2020.6.20
 BuildRequires:  python3-certifi
 # upstream use python3-chardet 3.0.4
@@ -53,7 +53,8 @@ BuildRequires:  python3-chardet >= 3.0.4
 # upstream use python3-css-parser 1.0.4
 BuildRequires:  python3-css-parser >= 1.0.4
 # upstream use python3-cssselect 1.1.0
-BuildRequires:  python3-cssselect >= 1.1.0
+BuildRequires:  python3-cssselect >= 1.0.3
+# upstream use python3-cssutils ?
 BuildRequires:  python3-cssutils >= 1.0.2
 # upstream use 3.7.2
 BuildRequires:  python3-devel >= 3.4
@@ -62,16 +63,17 @@ BuildRequires:  python3-dulwich
 # upstream use python3-html5lib >= 1.1
 BuildRequires:  python3-html5lib
 # upstream use for python3-lxml 4.5.1
-BuildRequires:  python3-lxml >= 4.5.1
+BuildRequires:  python3-lxml >= 4.4.2
 # upstream use for python3-qt5 5.12.3
 BuildRequires:  python3-qt5
 # upstream use for python3-regex 2020.6.8
 BuildRequires:  python3-regex
 # upstream use for python3-six 1.15.0
-BuildRequires:  python3-six >= 1.15.0
+BuildRequires:  python3-six >= 1.14.0
 # upstream use for python3-urllib3 1.25.9
+BuildRequires:  python3-urllib3 >= 1.24
+# upstream use python3-tk ?
 BuildRequires:  python3-tk
-BuildRequires:  python3-urllib3 >= 1.25.9
 BuildRequires:  unzip
 BuildRequires:  update-desktop-files
 BuildRequires:  zlib-devel