diff --git a/.gitignore b/.gitignore
index 52584ec..601fcf2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1 @@
-/strace-4.20.tar.xz
+/strace-4.21.tar.xz
diff --git a/sources b/sources
index 86f86a6..33595fd 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (strace-4.20.tar.xz) = 869b3b9c48401619073a021e20e80cce37d8884f615bdb52dac9e6a2903df11507d7a0cb0ccad75bcc03d8dfafead0e68d14267e663503e94849079c9a2ebd4c
+SHA512 (strace-4.21.tar.xz) = d3b0393f1f727530e2e5b4490c80a905d251223167a61f9a86884a4b8a4f25522c46c465961968ca25013f321e561e217cb6e8f15be31d4d371274030526187d
diff --git a/strace.spec b/strace.spec
index 9772705..c214c4a 100644
--- a/strace.spec
+++ b/strace.spec
@@ -1,13 +1,16 @@
 Summary: Tracks and displays system calls associated with a running process
 Name: strace
-Version: 4.20
-Release: 2%{?dist}
+Version: 4.21
+Release: 1%{?dist}
 License: BSD
 Group: Development/Debuggers
 URL: https://strace.io
 Source: https://downloads.sourceforge.net/strace/%{name}-%{version}.tar.xz
+%if 0%{?fedora} >= 18 || 0%{?centos} >= 8 || 0%{?rhel} >= 8 || 0%{?suse_version} >= 1200
+BuildRequires: pkgconfig(bluez)
+%endif
 %if 0%{?fedora} >= 20 || 0%{?centos} >= 8 || 0%{?rhel} >= 8 || 0%{?suse_version} >= 1300
-%define buildrequires_libunwind_devel BuildRequires: libunwind-devel
+%define buildrequires_libunwind_devel BuildRequires: libunwind-devel binutils-devel
 %endif
 %ifarch x86_64
 # for experimental -k option
@@ -48,8 +51,8 @@ The `strace' program in the `strace' package is for 32-bit processes.
 %prep
 %setup -q
 echo -n %version-%release > .tarball-version
-echo -n 2017 > .year
-echo -n 2017-08-28 > .strace.1.in.date
+echo -n 2018 > .year
+echo -n 2018-02-11 > .strace.1.in.date
 
 %build
 echo 'BEGIN OF BUILD ENVIRONMENT INFORMATION'
@@ -62,7 +65,7 @@ kver="$(echo -e '#include <linux/version.h>\nLINUX_VERSION_CODE' | gcc -E -P -)"
 printf 'kernel-headers %%s.%%s.%%s\n' $(($kver/65536)) $(($kver/256%%256)) $(($kver%%256))
 echo 'END OF BUILD ENVIRONMENT INFORMATION'
 
-%configure
+%configure --enable-mpers=check
 make %{?_smp_mflags}
 
 %install
@@ -83,6 +86,7 @@ rm -f %{buildroot}%{_bindir}/strace-graph
 %endif
 
 %check
+%{buildroot}%{_bindir}/strace -V
 make %{?_smp_mflags} -k check VERBOSE=1
 echo 'BEGIN OF TEST SUITE INFORMATION'
 tail -n 99999 -- tests*/test-suite.log tests*/ksysent.log
@@ -102,8 +106,8 @@ echo 'END OF TEST SUITE INFORMATION'
 %endif
 
 %changelog
-* Fri Feb 09 2018 Fedora Release Engineering <releng@fedoraproject.org> - 4.20-2
-- Rebuilt for https://fedoraproject.org/wiki/Fedora_28_Mass_Rebuild
+* Tue Feb 13 2018 Dmitry V. Levin <ldv@altlinux.org> - 4.21-1
+- v4.20 -> v4.21.
 
 * Mon Nov 13 2017 Dmitry V. Levin <ldv@altlinux.org> - 4.20-1
 - v4.19 -> v4.20.