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:             0.3.0
+version: 0.3.1
 license-file:        LICENSE
 license:             Apache-2.0
 author:              Dmitry Ivanov
diff --git a/src/OpenTelemetry/Network/Wai/Middleware.hs b/src/OpenTelemetry/Network/Wai/Middleware.hs
--- a/src/OpenTelemetry/Network/Wai/Middleware.hs
+++ b/src/OpenTelemetry/Network/Wai/Middleware.hs
@@ -9,7 +9,7 @@
 import OpenTelemetry.Propagation
 
 -- Semantic conventions for HTTP spans:
--- https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/data-http.md
+-- https://github.com/open-telemetry/opentelemetry-specification/blob/master/specification/trace/semantic_conventions/http.md
 
 middleware :: Application -> Application
 middleware app = \req sendResp -> do