diff --git a/Changelog b/Changelog
index 566c1c2e..a9e10949 100644
--- a/Changelog
+++ b/Changelog
@@ -1,9 +1,10 @@
-since version 1.6.2 release
-===========================
+version 1.6.3 (release tag v1.6.3rel)
+=====================================
  * add support for formats without separators in strptime (e.g. '20200229', issue #301).
    This required removing support for > 4 digit years.
  * set the c_api_binop_methods compiler directive to True to retain Cython 0.x
    behavior for arithmetic operators for Cython >= 3.0.0 (issue #271).
+ * support for python 3.12.
 
 version 1.6.2 (release tag v1.6.2rel)
 =====================================
diff --git a/src/cftime/_cftime.pyx b/src/cftime/_cftime.pyx
index 5c0029c8..0cf0ee7a 100644
--- a/src/cftime/_cftime.pyx
+++ b/src/cftime/_cftime.pyx
@@ -37,7 +37,7 @@ cdef int[12] _dayspermonth_leap = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 3
 cdef int[13] _cumdayspermonth = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365]
 cdef int[13] _cumdayspermonth_leap = [0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366]
 
-__version__ = '1.6.2'
+__version__ = '1.6.3'
 
 # Adapted from http://delete.me.uk/2005/03/iso8601.html
 # Note: This regex ensures that all ISO8601 timezone formats are accepted - but, due to legacy support for other timestrings, not all incorrect formats can be rejected.