diff --git a/src/DateHandler/_Date_fr.py b/src/DateHandler/_Date_fr.py
index 8de8cdd4d..4ed26f3d4 100644
--- a/src/DateHandler/_Date_fr.py
+++ b/src/DateHandler/_Date_fr.py
@@ -58,8 +58,8 @@ class DateParserFR(DateParser):
 
     # Add common value
 
-    month_to_int[u"bluviose"] = 1
-    month_to_int[u"vendose"] = 2
+    month_to_int[u"bluviose"] = 5
+    month_to_int[u"vendose"] = 6
     month_to_int[u"7bre"] = 9
     month_to_int[u"8bre"] = 10
     month_to_int[u"9bre"] = 11