diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,9 @@
 # Revision history for http3
 
+## 0.0.9
+
+* Fixing the support for http2 v5.1.
+
 ## 0.0.8
 
 * Using http2 v5.1.
diff --git a/http3.cabal b/http3.cabal
--- a/http3.cabal
+++ b/http3.cabal
@@ -1,6 +1,6 @@
 cabal-version:      2.4
 name:               http3
-version:            0.0.8
+version:            0.0.9
 license:            BSD-3-Clause
 license-file:       LICENSE
 maintainer:         Kazu Yamamoto <kazu@iij.ad.jp>
diff --git a/util/ClientX.hs b/util/ClientX.hs
--- a/util/ClientX.hs
+++ b/util/ClientX.hs
@@ -47,7 +47,7 @@
     cliconf =
         H3.ClientConfig
             { scheme = "https"
-            , authority = C8.pack auxAuthority
+            , authority = auxAuthority
             }
     client sendRequest _aux = loop n0
       where