diff --git a/docker/Dockerfile b/docker/Dockerfile
index 9ad84929..115e8b38 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -5,7 +5,7 @@ RUN /usr/local/bin/clean-install git g++ make binutils autoconf automake autotoo
         zlib1g libev4 libjemalloc2 libc-ares2 \
         ca-certificates psmisc \
         python && \
-    git clone --depth 1 -b OpenSSL_1_1_1g-quic-draft-32 https://github.com/tatsuhiro-t/openssl && \
+    git clone --depth 1 -b OpenSSL_1_1_1g-quic-draft-33 https://github.com/tatsuhiro-t/openssl && \
     cd openssl && ./config enable-tls1_3 --openssldir=/etc/ssl && make -j$(nproc) && make install_sw && cd .. && rm -rf openssl && \
     git clone --depth 1 https://github.com/ngtcp2/nghttp3 && \
     cd nghttp3 && autoreconf -i && \