diff --git a/Docker/Dockerfile b/Docker/Dockerfile
index 32b10900c..24c5c8e2b 100644
--- a/Docker/Dockerfile
+++ b/Docker/Dockerfile
@@ -40,7 +40,7 @@ RUN cd /opt/sources && git clone --single-branch https://github.com/cisco/hash-s
 
 # Install pkixssh to /opt/pkixssh for X509 interop testing with wolfSSH
 RUN mkdir /var/empty
-RUN cd /opt/sources && wget -q -O- https://roumenpetrov.info/secsh/src/pkixssh-14.1.1.tar.gz | tar xzf - && cd pkixssh-14.1.1 && ./configure --prefix=/opt/pkixssh/ --exec-prefix=/opt/pkixssh/ && make install
+RUN cd /opt/sources && wget -q -O- https://roumenpetrov.info/secsh/src/pkixssh-15.1.tar.gz | tar xzf - && cd pkixssh-15.1 && ./configure --prefix=/opt/pkixssh/ --exec-prefix=/opt/pkixssh/ && make install
 
 # Install udp/tcp-proxy
 RUN cd /opt/sources && git clone --depth=1 --single-branch --branch=main http://github.com/wolfssl/udp-proxy && cd udp-proxy && make && cp tcp_proxy udp_proxy /bin/.