diff --git a/pyerrors/input/json.py b/pyerrors/input/json.py
index a4fab75e..a6060d5f 100644
--- a/pyerrors/input/json.py
+++ b/pyerrors/input/json.py
@@ -207,7 +207,7 @@ def create_json_string(ol, description='', indent=1):
 
     d = {}
     d['program'] = 'pyerrors %s' % (pyerrorsversion.__version__)
-    d['version'] = '0.2'
+    d['version'] = '1.0'
     d['who'] = getpass.getuser()
     d['date'] = datetime.datetime.now().astimezone().strftime('%Y-%m-%d %H:%M:%S %z')
     d['host'] = socket.gethostname() + ', ' + platform.platform()