diff --git a/.gitignore b/.gitignore
index a525707..1787a59 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,3 +10,4 @@
 /fping-3.13.tar.gz
 /fping-3.15.tar.gz
 /fping-3.16.tar.gz
+/fping-4.0.tar.gz
diff --git a/fping.spec b/fping.spec
index b53a3b1..5186dcf 100644
--- a/fping.spec
+++ b/fping.spec
@@ -1,21 +1,13 @@
 %global _hardened_build 1
 
-%if 0%{?fedora} > 14
-%global use_capnetraw 1
-%endif
-%if 0%{?rhel} > 5
-%global use_capnetraw 1
-%endif
-
 Name: fping
-Version: 3.16
-Release: 1%{?dist}
+Version: 4.0
+Release: 2%{?dist}
 Summary: Scriptable, parallelized ping-like utility
 Group: Applications/Internet
 License: BSD with advertising
 URL: http://www.fping.org/
 Source0: http://fping.org/dist/%{name}-%{version}.tar.gz
-BuildRoot: %(mktemp -ud %{_tmppath}/%{name}-%{version}-%{release}-XXXXXX)
 
 %description
 fping is a ping-like program which can determine the accessibility of
@@ -27,7 +19,7 @@ use in scripting in mind.
 %setup -q -n %{name}-%{version}
 
 %build
-CFLAGS="%{?use_capnetraw:-DENABLE_F_OPTION} $RPM_OPT_FLAGS" %configure --enable-ipv4 --enable-ipv6
+%configure
 make
 
 %install
@@ -38,18 +30,18 @@ make DESTDIR="$RPM_BUILD_ROOT" install
 rm -rf $RPM_BUILD_ROOT
 
 %files
-%defattr(-,root,root,-)
-%doc ChangeLog COPYING README
-%if 0%{?use_capnetraw}
+%doc CHANGELOG.md COPYING
 %attr(0755,root,root) %caps(cap_net_raw=ep) %{_sbindir}/fping
-%attr(0755,root,root) %caps(cap_net_raw=ep) %{_sbindir}/fping6
-%else
-%attr(4711,root,root) %{_sbindir}/fping
-%attr(4711,root,root) %{_sbindir}/fping6
-%endif
 %{_mandir}/man8/*
 
 %changelog
+* Thu May 04 2017 Charles R. Anderson <cra@wpi.edu> - 4.0-2
+- remove obsolete CFLAGS
+
+* Wed May 03 2017 Charles R. Anderson <cra@wpi.edu> - 4.0-1
+- update to 4.0
+- remove EL5 and old Fedora compatibility
+
 * Mon Feb 20 2017 Charles R. Anderson <cra@wpi.edu> - 3.16-1
 - update to 3.16 (rhbz#1420733)
 
diff --git a/sources b/sources
index 3baa1e5..e9dfb7b 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (fping-3.16.tar.gz) = c97c338ef2f7fe0a904ca495503ed5d8745d449ea1821917658538db93683e37f019bc6f78abad8c7eed4ea8accba3b27f126b3af436f79bfd6f3f15d957c805
+SHA512 (fping-4.0.tar.gz) = 5dca650e9c34dd2e1bdbb981df61cf092230f07a15c4ccef105b9f58aaaa43e0d85dc9665db89631feded503ecc6f6be86446719de18e59349adb7c2f3e9757e