diff --git a/prometheus_client/openmetrics/exposition.py b/prometheus_client/openmetrics/exposition.py
index b0190301..26f3109f 100644
--- a/prometheus_client/openmetrics/exposition.py
+++ b/prometheus_client/openmetrics/exposition.py
@@ -3,7 +3,7 @@
 
 from ..utils import floatToGoString
 
-CONTENT_TYPE_LATEST = 'application/openmetrics-text; version=0.0.1; charset=utf-8'
+CONTENT_TYPE_LATEST = 'application/openmetrics-text; version=1.0.0; charset=utf-8'
 """Content type of the latest OpenMetrics text format"""