diff --git a/lib/event_sourcery/event.rb b/lib/event_sourcery/event.rb
index <HASH>..<HASH> 100644
--- a/lib/event_sourcery/event.rb
+++ b/lib/event_sourcery/event.rb
@@ -46,7 +46,7 @@ module EventSourcery
     # @param uuid [String] UUID as a string. Optional. Unique identifier for this event. A random UUID will be generated by default.
     # @param aggregate_id [String] UUID as a string. Aggregate instance UUID to which this event belongs to.
     # @param type [Class] Optional. Event type. {Event.type} will be used by default.
-    # @param version [String] Optional. Event version. Used by some event stores to guard against concurrency errors.
+    # @param version [String] Optional. Event's aggregate version. Used by some event stores to guard against concurrency errors.
     # @param created_at [Time] Optional. Created at timestamp (in UTC) for the event.
     # @param correlation_id [String] Optional. UUID attached to the event that allows reference to a particular transaction or event chain. This value is often supplied as part of a command issued by clients.
     # @param causation_id [String] Optional. UUID of the event that caused this event.
Event.version refers to event's aggregate's version