diff --git a/docs/HTTP3.md b/docs/HTTP3.md
index 829d0bfeed..55bdd02637 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_1_1_1d-quic-draft-25 https://github.com/tatsuhiro-t/openssl
+     % git clone --depth 1 -b OpenSSL_1_1_1d-quic-draft-27 https://github.com/tatsuhiro-t/openssl
      % cd openssl
      % ./config enable-tls1_3 --prefix=<somewhere1>
      % make
diff --git a/lib/altsvc.c b/lib/altsvc.c
index 8066302aeb..c39d86eaff 100644
--- a/lib/altsvc.c
+++ b/lib/altsvc.c
@@ -51,7 +51,7 @@
 #define MAX_ALTSVC_ALPNLEN 10
 
 #if (defined(USE_QUICHE) || defined(USE_NGTCP2)) && !defined(UNITTESTS)
-#define H3VERSION "h3-25"
+#define H3VERSION "h3-27"
 #else
 #define H3VERSION "h3"
 #endif