diff --git a/CHANGELOG.md b/CHANGELOG.md
index 73d9cd9..4446064 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,19 @@
 # iCalendar Timeseries Server Changelog
 
 
+<!-- BEGIN RELEASE v0.6 -->
+## Version 0.6
+
+### Changes
+
+<!-- BEGIN CHANGES 0.6 -->
+- Fix: A specific API field has to be a string rather than float, and recent Grafana versions validate this.
+
+<!-- END CHANGES 0.6 -->
+
+<!-- END RELEASE v0.6 -->
+
+
 <!-- BEGIN RELEASE v0.5 -->
 ## Version 0.5
 
diff --git a/icalendar_timeseries_server/__init__.py b/icalendar_timeseries_server/__init__.py
index 27f4493..80fd09f 100644
--- a/icalendar_timeseries_server/__init__.py
+++ b/icalendar_timeseries_server/__init__.py
@@ -1,2 +1,2 @@
 
-__version__ = '0.5'
+__version__ = '0.6'
diff --git a/icalendar_timeseries_server/event.py b/icalendar_timeseries_server/event.py
index d03ce79..46b25d7 100644
--- a/icalendar_timeseries_server/event.py
+++ b/icalendar_timeseries_server/event.py
@@ -59,7 +59,7 @@ class Event(Metric):
             },
             'value': [
                 self.start.timestamp(),
-                1
+                "1"
             ]
         }
         event['metric'].update(self._labels)