diff --git a/NEWS b/NEWS
index 5062842..12a1956 100644
--- a/NEWS
+++ b/NEWS
@@ -2,6 +2,11 @@ Fibers NEWS
 
 Fibers is a facility that provides Go-like concurrency for Guile Scheme.
 
+fibers 1.3.1 -- 2023-05-30
+==========================
+
+* Fix posix-clocks-darwin usage of extension library.
+
 fibers 1.3.0 -- 2023-05-29
 ==========================
 
diff --git a/configure.ac b/configure.ac
index 582270a..8824550 100644
--- a/configure.ac
+++ b/configure.ac
@@ -21,7 +21,7 @@ License along with this program.  If not, see
 ]])
 
 AC_PREREQ([2.69])
-AC_INIT([fibers],[1.3.0])
+AC_INIT([fibers],[1.3.1])
 AC_CONFIG_SRCDIR([env.in])
 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIRS([m4])
diff --git a/fibers.texi b/fibers.texi
index bf1f4c9..7efdd59 100644
--- a/fibers.texi
+++ b/fibers.texi
@@ -4,8 +4,8 @@
 @settitle Fibers
 @c %**end of header
 
-@set VERSION 1.3.0
-@set UPDATED 29 May 2023
+@set VERSION 1.3.1
+@set UPDATED 30 May 2023
 
 @copying
 This manual is for Fibers (version @value{VERSION}, updated