diff --git a/docker/Dockerfile b/docker/Dockerfile
index e7def7c..a9a8c6b 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -61,7 +61,7 @@ RUN cd && wget -q https://gitlab.cern.ch/geant4/geant4/-/archive/v11.1.2/geant4-
              -DGEANT4_BUILD_MULTITHREADED=OFF \
              -DGEANT4_BUILD_TLS_MODEL=global-dynamic \
     -DGEANT4_USE_RAYTRACER_X11=ON /tmp/geant4-v11.1.2 >/dev/null && \
-    make -j4 >/dev/null && \
+    make -j24 >/dev/null && \
     make install >/dev/null
 
 RUN rm -rf /tmp/geant4-v11.1.2 && \