diff --git a/src/athena-negotiation.cr b/src/athena-negotiation.cr
index f760d47..30b8e77 100644
--- a/src/athena-negotiation.cr
+++ b/src/athena-negotiation.cr
@@ -86,6 +86,8 @@ alias ANG = Athena::Negotiation
 #
 # The `ANG::LanguageNegotiator` type returns an `ANG::AcceptLanguage`, or `nil` if negotiating the best language has failed.
 module Athena::Negotiation
+  VERSION = "0.1.1"
+
   # Returns a lazily initialized `ANG::Negotiator` singleton instance.
   class_getter(negotiator) { ANG::Negotiator.new }