diff --git a/container/Dockerfile b/container/Dockerfile
index ec7734aa78398d9a48d914c6edeba0deccc57188..3870935a3624774e67290c47ea6fe9ab16f8898c 100644
--- a/container/Dockerfile
+++ b/container/Dockerfile
@@ -5,7 +5,7 @@ FROM ubuntu:18.04
 ARG OPENSTRUCTURE_VERSION="1.10.0"
 ARG PROMOD_VERSION="1.4.0"
 ARG SRC_FOLDER="/usr/local/src"
-ARG CPUS_FOR_MAKE=2
+ARG CPUS_FOR_MAKE=4
 ARG COMPLIB_DIR="/usr/local/share/ost_complib"
 ARG OPENMM_VERSION="7.1.1"
 ARG OPENMM_INCLUDE_PATH="/usr/local/openmm/include/"
@@ -135,7 +135,8 @@ RUN cd ${SRC_FOLDER} && \
              -DPYTHON_LIBRARIES=/usr/lib/x86_64-linux-gnu/libpython2.7.so \
              -DOPTIMIZE=ON \
              -DENABLE_SSE=1 && \
-             make && make codetest && make install && \
+    make -j ${CPUS_FOR_MAKE} && make codetest && make doctest && \
+    make install && \
     # cleanup
     cd ${SRC_FOLDER} && rm ${SRC_FOLDER}/promod-${PROMOD_VERSION}.tar.gz && \
     rm -rf ${SRC_FOLDER}/promod-${PROMOD_VERSION}