diff --git a/honggfuzz-2.1.tar.gz b/honggfuzz-2.1.tar.gz
deleted file mode 100644
index b9506f7..0000000
--- a/honggfuzz-2.1.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:e55e7c99c61763ba97ecbe846b66e8f65e911bbcbf8a95d691cc90bbb3e3744b
-size 65209308
diff --git a/honggfuzz-2.3.1.tar.gz b/honggfuzz-2.3.1.tar.gz
new file mode 100644
index 0000000..53623cc
--- /dev/null
+++ b/honggfuzz-2.3.1.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:3b1c8fbcd0a4ca9db72d88bfc74bc44edb78ccf386264549fb5f9bcf8f4fab72
+size 65221820
diff --git a/honggfuzz.changes b/honggfuzz.changes
index c1888fb..0b9b14f 100644
--- a/honggfuzz.changes
+++ b/honggfuzz.changes
@@ -1,3 +1,35 @@
+-------------------------------------------------------------------
+Wed Aug 26 07:52:12 UTC 2020 - Dirk Mueller <dmueller@suse.com>
+
+- update to 2.3.1:
+  - honggfuzz.h - split run_t into substructs
+  - clang-format options in .clang-format
+  - added missing mutex initializers
+  - removed unncessary comparisons to 'true' and 'false'
+  - improved NetBSD compatibility
+  - removed unnecessary memory fences (speed ups)
+  - faster searching through the binary for const 4/8-byte values
+  - removed unnecessary includes with iwyu
+  - libhfnetdriver - general improvements around local socket fuzzing and timeouts
+  - Added 8bitcnt instrumentation - use hfuzz-cc/hfuzz-8bitcnt-(gcc|clang) for that
+  - PC-guard instrumentation now uses edge counting
+  - --experimental_const_feedback is now set to true by default
+  - additional string instrumentation wrappers: glib, lcms
+  - additional mutators: splicing, changing ascii numbers
+  - additional integer comparison instrumentation (adding integers to the dynamic dictionary)
+  - fixed linking with ld.lld
+  - removed `sanitizer-coverage-prune-blocks` from hfuzz-cc.c
+  - most mutators have now either overwrite or insert versions
+  - fixed memory barriers in libhfuzz/
+  - implemented skip_factor which dictates how often a given input is fuzzed
+  - lowered the default timeout to 1 second
+  - honggfuzz now uses microseconds, instead of milliseconds across the code
+  - added some new functions to libhfcommon/files
+  - enabled more aggressive inlining in hfuzz-cc/
+  - fixed compilation dependency under MacOS X
+- remove 0001-fix-some-m32-compilation-issues-type-casting.patch (upstream)
+ 
+
 -------------------------------------------------------------------
 Wed Mar 18 22:57:55 UTC 2020 - Christophe Giboudeaux <christophe@krop.fr>
 
diff --git a/honggfuzz.spec b/honggfuzz.spec
index e97cc7a..5461f8a 100644
--- a/honggfuzz.spec
+++ b/honggfuzz.spec
@@ -17,14 +17,13 @@
 
 
 Name:           honggfuzz
-Version:        2.1
+Version:        2.3.1
 Release:        0
 Summary:        Security-oriented fuzzer with various analysis options
 License:        Apache-2.0
 Group:          Development/Tools/Other
 URL:            https://honggfuzz.com
 Source:         https://github.com/google/honggfuzz/archive/%{version}.tar.gz#/%{name}-%{version}.tar.gz
-Patch0:         0001-fix-some-m32-compilation-issues-type-casting.patch
 BuildRequires:  binutils-devel
 BuildRequires:  libunwind-devel
 BuildRequires:  zlib-devel
@@ -36,7 +35,6 @@ evolutionary, feedback-driven fuzzing based on code coverage
 
 %prep
 %setup -q
-%patch0 -p1
 
 %build
 export CFLAGS="%{optflags}"
@@ -48,7 +46,7 @@ install -Dpm 0755 %{name} \
 
 %files
 %license COPYING
-%doc CHANGELOG CONTRIBUTING README.md
+%doc CHANGELOG CONTRIBUTING.md README.md
 %{_bindir}/%{name}
 
 %changelog