diff --git a/NEWS b/NEWS
index 3a6e990..7572893 100644
--- a/NEWS
+++ b/NEWS
@@ -1,3 +1,11 @@
+Release 1.2.1: 15th February 2022
+---------------------------------
+
+The only change in this release is a minor adjustment to the histogram
+code so it works on systems with small stacks.  This was detected on
+Windows Mingw builds.
+
+
 Release 1.2: 10th February 2022
 -------------------------------
 
diff --git a/configure.ac b/configure.ac
index 109a5ad..0e07033 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,5 +1,5 @@
 dnl Process this file with autoconf to produce a configure script.
-AC_INIT(htscodecs, 1.2.0)
+AC_INIT(htscodecs, 1.2.1)
 
 # Some functions benefit from -O3 optimisation, so if the user didn't
 # explicitly set any compiler flags, we'll plump for O3.
@@ -60,7 +60,7 @@ AM_MAINTAINER_MODE
 #       libhtscodecs.so.1.1.0
 
 VERS_CURRENT=2
-VERS_REVISION=4
+VERS_REVISION=5
 VERS_AGE=0
 AC_SUBST(VERS_CURRENT)
 AC_SUBST(VERS_REVISION)
diff --git a/htscodecs/htscodecs.h b/htscodecs/htscodecs.h
index f4cfe28..45ea27e 100644
--- a/htscodecs/htscodecs.h
+++ b/htscodecs/htscodecs.h
@@ -43,7 +43,7 @@
  * Note currently this needs manually editing as it isn't automatically
  * updated by autoconf.
  */
-#define HTSCODECS_VERSION 100200
+#define HTSCODECS_VERSION 100201
 
 /*
  * A const string form of the HTSCODECS_VERSION define.