diff --git a/opentelemetry-wai.cabal b/opentelemetry-wai.cabal
--- a/opentelemetry-wai.cabal
+++ b/opentelemetry-wai.cabal
@@ -2,7 +2,7 @@
 name:                opentelemetry-wai
 description:         OpenTelemetry middleware for wai
 category:            OpenTelemetry
-version: 0.4.2
+version: 0.5.0
 license-file:        LICENSE
 license:             Apache-2.0
 author:              Dmitry Ivanov