diff --git a/python-jsonpatch.spec b/python-jsonpatch.spec
index d551084..14b3ccb 100644
--- a/python-jsonpatch.spec
+++ b/python-jsonpatch.spec
@@ -16,7 +16,7 @@
 
 Name:           python-%{pypi_name}
 Version:        1.21
-Release:        4%{?dist}
+Release:        5%{?dist}
 Summary:        Applying JSON Patches in Python
 
 License:        BSD
@@ -72,7 +72,7 @@ Library to apply JSON Patches according to RFC 6902 - Python 3 build.
 %endif # with python2
 
 %if %{with python3}
-LANG=en_US.utf8 %py3_build
+%py3_build
 %endif # with python3
 
 %install
@@ -88,7 +88,7 @@ done;
 %endif # with python2
 
 %if %{with python3}
-LANG=en_US.utf8 %py3_install
+%py3_install
 for bin in jsondiff jsonpatch; do
 mv %{buildroot}%{_bindir}/$bin %{buildroot}%{_bindir}/$bin-%{python3_version}
 ln -s ./$bin-%{python3_version} %{buildroot}%{_bindir}/$bin-3
@@ -133,6 +133,10 @@ done;
 %endif # with python3
 
 %changelog
+* Sun Nov 18 2018 Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl> - 1.21-5
+- Drop explicit locale setting
+  See https://fedoraproject.org/wiki/Changes/Remove_glibc-langpacks-all_from_buildroot
+
 * Sat Jul 14 2018 Fedora Release Engineering <releng@fedoraproject.org> - 1.21-4
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass_Rebuild