diff --git a/README.rst b/README.rst
index b51fc6fdba2883d22f63007392095e91b4258d61..bf0de5c9fb0ba8fdfa512afc52686a1aff275a0e 100644
--- a/README.rst
+++ b/README.rst
@@ -19,6 +19,7 @@ only.
 
 For older draft implementations:
 
+- `draft-24 <https://github.com/ngtcp2/ngtcp2/tree/draft-24>`_
 - `draft-23 <https://github.com/ngtcp2/ngtcp2/tree/draft-23>`_
 - `draft-22 <https://github.com/ngtcp2/ngtcp2/tree/draft-22>`_
 
@@ -52,14 +53,14 @@ The client and server under examples directory require patched OpenSSL
 as crypto backend:
 
 * Patched OpenSSL
-  (https://github.com/tatsuhiro-t/openssl/tree/OpenSSL_1_1_1d-quic-draft-24)
+  (https://github.com/tatsuhiro-t/openssl/tree/OpenSSL_1_1_1d-quic-draft-25)
 
 Build from git
 --------------
 
 .. code-block:: text
 
-   $ git clone --depth 1 -b OpenSSL_1_1_1d-quic-draft-24 https://github.com/tatsuhiro-t/openssl
+   $ git clone --depth 1 -b OpenSSL_1_1_1d-quic-draft-25 https://github.com/tatsuhiro-t/openssl
    $ cd openssl
    $ # For Linux
    $ ./config enable-tls1_3 --prefix=$PWD/build
diff --git a/ci/build_openssl.sh b/ci/build_openssl.sh
index 002e043505968ced0ffc827d78ecfbcf23af726e..8fa6b24ae6f98437828da0d768f052db459709b4 100755
--- a/ci/build_openssl.sh
+++ b/ci/build_openssl.sh
@@ -2,7 +2,7 @@
 #build last openssl master (for Travis)
 
 cd ..
-git clone --depth 1 -b OpenSSL_1_1_1d-quic-draft-24 https://github.com/tatsuhiro-t/openssl
+git clone --depth 1 -b OpenSSL_1_1_1d-quic-draft-25 https://github.com/tatsuhiro-t/openssl
 cd openssl
 ./config enable-tls1_3 --prefix=$PWD/build
 make -j$(nproc)
diff --git a/lib/includes/ngtcp2/ngtcp2.h b/lib/includes/ngtcp2/ngtcp2.h
index 11ae4aef73587dd8fd6d6dc6980a40aeecf900c3..4a8fd4ed13888dcd84759892fad3a55626965d99 100644
--- a/lib/includes/ngtcp2/ngtcp2.h
+++ b/lib/includes/ngtcp2/ngtcp2.h
@@ -159,7 +159,7 @@ typedef struct ngtcp2_mem {
 } ngtcp2_mem;
 
 /* NGTCP2_PROTO_VER is the supported QUIC protocol version. */
-#define NGTCP2_PROTO_VER 0xff000018u
+#define NGTCP2_PROTO_VER 0xff000019u
 /* NGTCP2_PROTO_VER_MAX is the highest QUIC version the library
    supports. */
 #define NGTCP2_PROTO_VER_MAX NGTCP2_PROTO_VER
@@ -167,7 +167,7 @@ typedef struct ngtcp2_mem {
 /* NGTCP2_ALPN_H3 is a serialized form of HTTP/3 ALPN protocol
    identifier this library supports.  Notice that the first byte is
    the length of the following protocol identifier. */
-#define NGTCP2_ALPN_H3 "\x5h3-24"
+#define NGTCP2_ALPN_H3 "\x5h3-25"
 
 #define NGTCP2_MAX_PKTLEN_IPV4 1252
 #define NGTCP2_MAX_PKTLEN_IPV6 1232