diff --git a/Dockerfile b/Dockerfile
index 9f37379b..a8cba295 100755
--- a/Dockerfile
+++ b/Dockerfile
@@ -33,100 +33,100 @@ RUN apt-get update && apt update && apt upgrade -y && \
     # =================================
     ## apt-get installs ===============
     apt-get install -y \
-        # important linux tool
-        wget \  
-        # install python libraries
-        python3-pip \
-        # be able to use git inside container
-        git \
-        #
-        fprintd \
-        #
-        libfprint-2-2:amd64 \
-        #
-        libgl1-mesa-glx \
-        #
-        libglib2.0-0 \
-        #
-        libpam-fprintd:amd64 \
-        #
-        libsm6 \
-        #
-        libxrender-dev \
-        #
-        libxext6 \
-        #
-        ninja-build \
-        #
-        ros-humble-diagnostic-updater \
+    # important linux tool
+    wget \  
+    # install python libraries
+    python3-pip \
+    # be able to use git inside container
+    git \
+    #
+    fprintd \
+    #
+    libfprint-2-2:amd64 \
+    #
+    libgl1-mesa-glx \
+    #
+    libglib2.0-0 \
+    #
+    libpam-fprintd:amd64 \
+    #
+    libsm6 \
+    #
+    libxrender-dev \
+    #
+    libxext6 \
+    #
+    ninja-build \
+    #
+    ros-humble-diagnostic-updater \
     # =================================
     # apt installs ====================
     && apt install -y \
-        #
-        alsa-base \
-        #
-        alsa-utils \
-        #
-        byobu \
-        #
-        espeak \
-        #
-        ffmpeg \
-        #
-        libespeak1 \
-        #
-        libsndfile1-dev \
-        #
-        minicom \
-        #
-        python3-matplotlib \
-        #
-        python3-nose \
-        #
-        python3-scipy \
-        #
-        ros-humble-ament-cmake* \
-        # needed for ros2_numpy package (maybe others)
-        ros-humble-ament-cmake-nose \
-        #
-        ros-humble-async-web-server-cpp \
-        #
-        ros-humble-cv-bridge \
-        #
-        ros-humble-image-transport \
-        #
-        ros-humble-joy-linux \
-        #
-        ros-humble-lgsvl-msgs \
-        # Nav2 stack - used for path planning
-        ros-humble-navigation2 \
-        #
-        ros-humble-pcl-conversions \
-        #
-        ros-humble-pcl-ros \
-        #
-        ros-humble-rmw-fastrtps-cpp \
-        #
-        ros-humble-robot-localization \
-        #
-        ros-humble-rosbridge-server \
-        #
-        ros-humble-ros-testing \
-        # rqt provides oscilliscope-style plotting of topics, etc
-        ros-humble-rqt* \
-        #
-        ros-humble-rviz2 \
-        #
-        ros-humble-tf-transformations \
-        # ROS Support for Velodyne LiDAR
-        ros-humble-velodyne-driver \
-        ros-humble-velodyne-laserscan \
-        ros-humble-velodyne-msgs \
-        ros-humble-velodyne-pointcloud \
-        #
-        ros-humble-vision-opencv \
-        #
-        software-properties-common \
+    #
+    alsa-base \
+    #
+    alsa-utils \
+    #
+    byobu \
+    #
+    espeak \
+    #
+    ffmpeg \
+    #
+    libespeak1 \
+    #
+    libsndfile1-dev \
+    #
+    minicom \
+    #
+    python3-matplotlib \
+    #
+    python3-nose \
+    #
+    python3-scipy \
+    #
+    ros-humble-ament-cmake* \
+    # needed for ros2_numpy package (maybe others)
+    ros-humble-ament-cmake-nose \
+    #
+    ros-humble-async-web-server-cpp \
+    #
+    ros-humble-cv-bridge \
+    #
+    ros-humble-image-transport \
+    #
+    ros-humble-joy-linux \
+    #
+    ros-humble-lgsvl-msgs \
+    # Nav2 stack - used for path planning
+    ros-humble-navigation2 \
+    #
+    ros-humble-pcl-conversions \
+    #
+    ros-humble-pcl-ros \
+    #
+    ros-humble-rmw-fastrtps-cpp \
+    #
+    ros-humble-robot-localization \
+    #
+    ros-humble-rosbridge-server \
+    #
+    ros-humble-ros-testing \
+    # rqt provides oscilliscope-style plotting of topics, etc
+    ros-humble-rqt* \
+    #
+    ros-humble-rviz2 \
+    #
+    ros-humble-tf-transformations \
+    # ROS Support for Velodyne LiDAR
+    ros-humble-velodyne-driver \
+    ros-humble-velodyne-laserscan \
+    ros-humble-velodyne-msgs \
+    ros-humble-velodyne-pointcloud \
+    #
+    ros-humble-vision-opencv \
+    #
+    software-properties-common \
     # cleanup to make image smaller
     && apt clean && rm -rf /var/lib/apt/lists/*
 
@@ -238,8 +238,13 @@ WORKDIR /
 RUN mkdir /lib/x86_64-linux-gnu/cmake/pcl/include && ln -s /usr/include/pcl-1.10/pcl /lib/x86_64-linux-gnu/cmake/pcl/include/pcl
 
 # Lemon
-# Library for Efficient Modeling and Optimization in Networks. It is a C++ template library providing efficient implementations of common data structures and algorithms with focus on combinatorial optimization tasks connected mainly with graphs and networks.
-RUN wget http://lemon.cs.elte.hu/pub/sources/lemon-1.3.1.tar.gz && tar xvzf lemon-1.3.1.tar.gz && cd lemon-1.3.1 && mkdir build && cd build && cmake .. && make && make install
+# Library for Efficient Modeling and Optimization in Networks. 
+# It is a C++ template library providing efficient implementations of common data structures and algorithms 
+# with focus on combinatorial optimization tasks connected mainly with graphs and networks.
+RUN git clone https://github.com/The-OpenROAD-Project/lemon-graph.git && cd lemon-graph \
+    # This specific commit is for Lemon-1.3.1. See https://github.com/The-OpenROAD-Project/lemon-graph/commits/master.
+    && git checkout 62ac753 \
+    && mkdir build && cd build && cmake .. && make && make install
 
 # RUN useradd -ms /bin/bash docker
 RUN usermod -a -G dialout root