diff --git a/.docker/Dockerfile.ubuntu b/.docker/Dockerfile.ubuntu
index b89ca3cf..4665fea5 100644
--- a/.docker/Dockerfile.ubuntu
+++ b/.docker/Dockerfile.ubuntu
@@ -77,7 +77,7 @@ COPY install-static-libs.sh /usr/local/bin/install-static-libs.sh
 RUN bash /usr/local/bin/install-static-libs.sh gcc-13 clang-18
 ARG ARCH
 # upx-4.2.2 is broken for arm64 (https://github.com/upx/upx/issues/758)
-RUN wget -O - https://github.com/upx/upx/releases/download/v4.2.1/upx-4.2.1-$(bash -c "echo \${0//v8/}" $ARCH)_linux.tar.xz | tar -xJf - -C /usr/local/bin --strip-components=1 --wildcards "*/upx"
+RUN wget -O - https://github.com/upx/upx/releases/download/v5.0.0/upx-5.0.0-$(bash -c "echo \${0//v8/}" $ARCH)_linux.tar.xz | tar -xJf - -C /usr/local/bin --strip-components=1 --wildcards "*/upx"
 # current ronn version is horribly broken
 RUN gem install ronn-ng
 # RUN useradd -g users -u 1000 -m mhx