diff --git a/docs/HTTP3.md b/docs/HTTP3.md
index faa556441..66de7b3de 100644
--- a/docs/HTTP3.md
+++ b/docs/HTTP3.md
@@ -33,7 +33,7 @@ in the master branch using pull-requests, just like ordinary changes.
 
 Build (patched) OpenSSL
 
-     % git clone --depth 1 -b openssl-quic-draft-22 https://github.com/tatsuhiro-t/openssl
+     % git clone --depth 1 -b openssl-quic-draft-23 https://github.com/tatsuhiro-t/openssl
      % cd openssl
      % ./config enable-tls1_3 --prefix=<somewhere1>
      % make
@@ -52,7 +52,7 @@ Build nghttp3
 Build ngtcp2
 
      % cd ..
-     % git clone -b draft-22 https://github.com/ngtcp2/ngtcp2
+     % git clone https://github.com/ngtcp2/ngtcp2
      % cd ngtcp2
      % autoreconf -i
      % ./configure PKG_CONFIG_PATH=<somewhere1>/lib/pkgconfig:<somewhere2>/lib/pkgconfig LDFLAGS="-Wl,-rpath,<somehere1>/lib" --prefix==<somewhere3>
diff --git a/lib/altsvc.c b/lib/altsvc.c
index a649fefd8..ecf6f3946 100644
--- a/lib/altsvc.c
+++ b/lib/altsvc.c
@@ -55,7 +55,7 @@ static enum alpnid alpn2alpnid(char *name)
   if(strcasecompare(name, "h2"))
     return ALPN_h2;
 #if (defined(USE_QUICHE) || defined(USE_NGHTTP2)) && !defined(UNITTESTS)
-  if(strcasecompare(name, "h3-22"))
+  if(strcasecompare(name, "h3-23"))
     return ALPN_h3;
 #else
   if(strcasecompare(name, "h3"))