diff --git a/cftime/_cftime.pyx b/cftime/_cftime.pyx
index ce45d5f1..c5bedd44 100644
--- a/cftime/_cftime.pyx
+++ b/cftime/_cftime.pyx
@@ -27,7 +27,7 @@ _units = microsec_units+millisec_units+sec_units+min_units+hr_units+day_units
 _calendars = ['standard', 'gregorian', 'proleptic_gregorian',
               'noleap', 'julian', 'all_leap', '365_day', '366_day', '360_day']
 
-__version__ = '1.0.0b1'
+__version__ = '1.0.0'
 
 # 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.