diff --git a/.files b/.files
index 0361224..689f5a7 100644
Binary files a/.files and b/.files differ
diff --git a/.rev b/.rev
index 4b6c0ab..686fe49 100644
--- a/.rev
+++ b/.rev
@@ -398,4 +398,14 @@ Documentation
     <comment></comment>
     <requestid>757556</requestid>
   </revision>
+  <revision rev="47" vrev="1">
+    <srcmd5>555f4fb96af528981c53c79fc3f86428</srcmd5>
+    <version>3.5.1</version>
+    <time>1581455787</time>
+    <user>dimstar_suse</user>
+    <comment>- Update to version 3.5.1:
+  * Portability fixes.
+  * Fix compiler warnings.</comment>
+    <requestid>770346</requestid>
+  </revision>
 </revisionlist>
diff --git a/bison-3.5.1.tar.xz b/bison-3.5.1.tar.xz
new file mode 120000
index 0000000..1690adb
--- /dev/null
+++ b/bison-3.5.1.tar.xz
@@ -0,0 +1 @@
+/ipfs/bafybeieozl5afe4luuvku4yfzn36htf4q7kjnaikzeype3jm5sw6wckzeu
\ No newline at end of file
diff --git a/bison-3.5.1.tar.xz.sig b/bison-3.5.1.tar.xz.sig
new file mode 100644
index 0000000..00de9e2
--- /dev/null
+++ b/bison-3.5.1.tar.xz.sig
@@ -0,0 +1,6 @@
+-----BEGIN PGP SIGNATURE-----
+
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+=txCR
+-----END PGP SIGNATURE-----
diff --git a/bison-3.5.tar.xz b/bison-3.5.tar.xz
deleted file mode 120000
index 6d84294..0000000
--- a/bison-3.5.tar.xz
+++ /dev/null
@@ -1 +0,0 @@
-/ipfs/bafybeiarzrabwjlsoxpl5ysmmv2lrcaycoxi6276r6kedxtdqr3qcs5gty
\ No newline at end of file
diff --git a/bison-3.5.tar.xz.sig b/bison-3.5.tar.xz.sig
deleted file mode 100644
index 5e9b0d4..0000000
--- a/bison-3.5.tar.xz.sig
+++ /dev/null
@@ -1,6 +0,0 @@
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diff --git a/bison.changes b/bison.changes
index 9bf8a7c..95cf65a 100644
--- a/bison.changes
+++ b/bison.changes
@@ -1,4 +1,11 @@
 -------------------------------------------------------------------
+Wed Feb  5 16:11:27 UTC 2020 - Martin Pluskal <mpluskal@suse.com>
+
+- Update to version 3.5.1:
+  * Portability fixes.
+  * Fix compiler warnings.
+
+-------------------------------------------------------------------
 Tue Dec 17 03:01:16 UTC 2019 - Stefan Brüns <stefan.bruens@rwth-aachen.de>
 
 - Drop unnecessary autoconf BuildRequires. 
diff --git a/bison.spec b/bison.spec
index 4372170..258d22a 100644
--- a/bison.spec
+++ b/bison.spec
@@ -1,7 +1,7 @@
 #
 # spec file for package bison
 #
-# Copyright (c) 2019 SUSE LLC
+# Copyright (c) 2020 SUSE LLC
 #
 # 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:           bison
-Version:        3.5
+Version:        3.5.1
 Release:        0
 Summary:        The GNU Parser Generator
 License:        GPL-3.0-or-later
@@ -51,13 +51,13 @@ Bison is a parser generator similar to yacc(1).
   gl_cv_func_printf_directive_n=yes \
   gl_cv_func_printf_infinite_long_double=yes
 %if 0%{?do_profiling}
-  make %{?_smp_mflags} CFLAGS="%{optflags} %{cflags_profile_generate}" V=1
+  %make_build CFLAGS="%{optflags} %{cflags_profile_generate}"
   # non-parallel profiling for reproducible results https://bugzilla.opensuse.org/show_bug.cgi?id=1040589
-  make --jobs=1 CFLAGS="%{optflags}" check
-  make %{?_smp_mflags} clean
-  make %{?_smp_mflags} CFLAGS="%{optflags} %{cflags_profile_feedback}" V=1
+  %make_build --jobs=1 CFLAGS="%{optflags}" check
+  %make_build clean
+  %make_build CFLAGS="%{optflags} %{cflags_profile_feedback}"
 %else
-  make %{?_smp_mflags} CFLAGS="%{optflags}"
+  %make_build CFLAGS="%{optflags}"
 %endif
 
 %check