diff --git a/grep-2.27.tar.xz b/grep-2.27.tar.xz
deleted file mode 100644
index b825429..0000000
--- a/grep-2.27.tar.xz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:ad4cc44d23074a1c3a8baae8fbafff2a8c60f38a9a6108f985eef6fbee6dcaeb
-size 1360388
diff --git a/grep-2.27.tar.xz.sig b/grep-2.27.tar.xz.sig
deleted file mode 100644
index e0924d3..0000000
--- a/grep-2.27.tar.xz.sig
+++ /dev/null
@@ -1,16 +0,0 @@
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-
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diff --git a/grep-2.28.tar.xz b/grep-2.28.tar.xz
new file mode 100644
index 0000000..194c9c7
--- /dev/null
+++ b/grep-2.28.tar.xz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3bad4c23eeb8dfa2fa84cdbe368398f75fdcd54bde411db83b9ef7fba5b60185
+size 1374532
diff --git a/grep-2.28.tar.xz.sig b/grep-2.28.tar.xz.sig
new file mode 100644
index 0000000..29d35b3
--- /dev/null
+++ b/grep-2.28.tar.xz.sig
@@ -0,0 +1,16 @@
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diff --git a/grep.changes b/grep.changes
index c807cbc..26fd64c 100644
--- a/grep.changes
+++ b/grep.changes
@@ -1,3 +1,17 @@
+-------------------------------------------------------------------
+Wed Feb  8 09:56:26 UTC 2017 - mpluskal@suse.com
+
+- Update to version 2.28:
+  * Improve performance for -E or -G pattern lists that are easily
+    converted to -F format.
+  * Fix performance regression with multiple patterns.
+  * When standard output is /dev/null, grep no longer fails when 
+    standard input is a file in the Linux /proc file system, or when
+    standard input is a pipe and standard output is in append mode.
+  * When grep -Fo finds matches of differing length, it could
+    mistakenly print a shorter one.  Now it prints a longest one.
+- Drop upstreamed proc-lseek-glitch.patch 
+
 -------------------------------------------------------------------
 Mon Dec 12 16:51:24 UTC 2016 - schwab@suse.de
 
diff --git a/grep.keyring b/grep.keyring
index fc3c5f8..3190db4 100644
Binary files a/grep.keyring and b/grep.keyring differ
diff --git a/grep.spec b/grep.spec
index 64c5160..2188915 100644
--- a/grep.spec
+++ b/grep.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package grep
 #
-# Copyright (c) 2016 SUSE LINUX GmbH, Nuernberg, Germany.
+# Copyright (c) 2017 SUSE LINUX GmbH, Nuernberg, Germany.
 #
 # All modifications and additions to the file contributed by third parties
 # remain the property of their copyright owners, unless otherwise agreed
@@ -17,7 +17,7 @@
 
 
 Name:           grep
-Version:        2.27
+Version:        2.28
 Release:        0
 Summary:        Print lines matching a pattern
 License:        GPL-3.0+
@@ -26,7 +26,6 @@ Url:            http://www.gnu.org/software/grep/
 Source0:        http://ftp.gnu.org/gnu/%{name}/%{name}-%{version}.tar.xz
 Source2:        http://ftp.gnu.org/gnu/%{name}/%{name}-%{version}.tar.xz.sig
 Source3:        http://savannah.gnu.org/project/memberlist-gpgkeys.php?group=grep&download=1#/%{name}.keyring
-Patch1:         proc-lseek-glitch.patch
 BuildRequires:  makeinfo
 BuildRequires:  pcre-devel
 BuildRequires:  xz
@@ -45,7 +44,6 @@ the matching lines.
 
 %prep
 %setup -q
-%patch1 -p1
 %if 0%{?suse_version} < 1120
 echo "ac_cv_search_pcre_compile=\${ac_cv_search_pcre_compile=%{_libdir}/libpcre.a}" >config.cache
 %endif
diff --git a/proc-lseek-glitch.patch b/proc-lseek-glitch.patch
deleted file mode 100644
index e337685..0000000
--- a/proc-lseek-glitch.patch
+++ /dev/null
@@ -1,45 +0,0 @@
-Index: grep-2.27/src/grep.c
-===================================================================
---- grep-2.27.orig/src/grep.c
-+++ grep-2.27/src/grep.c
-@@ -1758,29 +1758,17 @@ drain_input (int fd, struct stat const *
- static void
- finalize_input (int fd, struct stat const *st, bool ineof)
- {
--  if (fd != STDIN_FILENO)
--    return;
--
--  if (outleft)
--    {
--      if (ineof)
--        return;
--      if (seek_failed)
--        {
--          if (drain_input (fd, st))
--            return;
--        }
--      else if (0 <= lseek (fd, 0, SEEK_END))
--        return;
--    }
--  else
--    {
--      if (seek_failed || bufoffset == after_last_match
--          || 0 <= lseek (fd, after_last_match, SEEK_SET))
--        return;
--    }
--
--  suppressible_error (errno);
-+  if (fd == STDIN_FILENO
-+      && (outleft
-+          ? (!ineof
-+             && (seek_failed
-+                 || (lseek (fd, 0, SEEK_END) < 0
-+                     /* Linux proc file system has EINVAL (Bug#25180).  */
-+                     && errno != EINVAL))
-+             && ! drain_input (fd, st))
-+          : (bufoffset != after_last_match && !seek_failed
-+             && lseek (fd, after_last_match, SEEK_SET) < 0)))
-+    suppressible_error (errno);
- }
- 
- static bool