diff --git a/Dockerfile b/Dockerfile
index c9f38e7..c8090c3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,7 +12,7 @@ RUN \
     apt-get -yq install \
         aptitude apt-rdepends bash build-essential ccache clang clang-tidy cmake cppcheck curl doxygen diffstat gawk gdb git gnupg gperf iputils-ping \
         libboost-all-dev libfcgi-dev libgfortran5 libgl1-mesa-dev libjemalloc-dev libjemalloc2 libmlpack-dev libtbb-dev libssl-dev libyaml-cpp-dev \
-        linux-tools-generic nano nasm ninja-build openjdk-11-jdk openssh-server openssl pkg-config python3 spawn-fcgi \
+        linux-tools-generic nano nasm ninja-build openjdk-11-jdk openssh-server openssl pkg-config python3 python-is-python3 spawn-fcgi \
         sudo tini unzip valgrind wget zip texinfo gcc-multilib chrpath socat cpio xz-utils debianutils libegl1-mesa \
         patch perl tar rsync bc libelf-dev libssl-dev libsdl1.2-dev xterm mesa-common-dev whois software-properties-common \
         libx11-xcb-dev libxcb-dri3-dev libxcb-icccm4-dev libxcb-image0-dev libxcb-keysyms1-dev libxcb-randr0-dev libxcb-render-util0-dev \