diff --git a/CHANGES b/CHANGES
index b263222..4600221 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4,8 +4,35 @@ CHANGES -- trio
 The changes listed without a name attributed to them were most likely done by
 Bjorn Reese and/or Daniel Stenberg.
 
-Version 1.17 - 2022/8/22
-------------------------
+Version 1.17.1 - 2023/02/03
+---------------------------
+* orbea
+  Use semantic versioning. (https://semver.org/)
+
+* Fix many compiler warnings with gcc and clang.
+
+* Improve C standards portability and fix the build with -xc++.
+
+* Workaround runtime issues with -Ofast.
+
+* Fix out of tree builds with doxygen support enabled.
+
+* Further improve the build system.
+
+* Update doxygen.
+
+* Remove trailing and redundant whitespace.
+
+* Add dedicated INSTALL and LICENSE files.
+
+* Update the README using the trio homepage.
+  (https://daniel.haxx.se/projects/trio/)
+
+* Add test-build.sh for regression testing.
+
+
+Version 1.17 - 2022/08/22
+-------------------------
 * Jochen Roemmler
   Fixes typos detected by the 'codespell' program.
 
diff --git a/configure.ac b/configure.ac
index 751ce44..25503fb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 AC_PREREQ([2.69])
-AC_INIT([trio],[1.17])
+AC_INIT([trio],[1.17.1])
 AC_CONFIG_AUX_DIR([.])
 AC_CONFIG_SRCDIR([compare.c])
 AC_CONFIG_HEADERS([config.h])