diff --git a/ctf/Dockerfile b/ctf/Dockerfile
index f9f7809..bf86861 100644
--- a/ctf/Dockerfile
+++ b/ctf/Dockerfile
@@ -1,21 +1,26 @@
-# docker build -t ctf:ubuntu19.10 .
+# docker build -t ctf:latest .
+# docker run --rm -v $PWD:/pwd --cap-add=SYS_PTRACE --security-opt seccomp=unconfined -d --name ctf -i ctf:ubuntu
+# docker exec -it ctf /bin/bash
+
 # If using Windows
-      # docker run --rm -v %cd%:/pwd --cap-add=SYS_PTRACE --security-opt seccomp=unconfined -d --name ctf -i ctf:ubuntu19.10
+      # docker run --rm -v %cd%:/pwd --cap-add=SYS_PTRACE --security-opt seccomp=unconfined -d --name ctf -i ctf:ubuntu
 # If using Linux    
-      # docker run --rm -v $PWD:/pwd --cap-add=SYS_PTRACE --security-opt seccomp=unconfined -d --name ctf -i ctf:ubuntu19.10
-# docker exec -it ctf /bin/bash
+      # docker run --rm -v $PWD:/pwd --cap-add=SYS_PTRACE --security-opt seccomp=unconfined -d --name ctf -i ctf:ubuntu
+
 
-FROM ubuntu:19.10
+FROM ubuntu:22.04
 ENV LC_CTYPE C.UTF-8
 ENV DEBIAN_FRONTEND=noninteractive
-RUN dpkg --add-architecture i386 && \
-apt-get update && \
-apt-get install -y build-essential jq strace ltrace curl wget rubygems gcc dnsutils netcat gcc-multilib net-tools vim gdb gdb-multiarch python python3 python3-pip python3-dev libssl-dev libffi-dev wget git make procps libpcre3-dev libdb-dev libxt-dev libxaw7-dev python-pip libc6:i386 libncurses5:i386 libstdc++6:i386 && \
-pip install capstone requests pwntools r2pipe && \
-pip3 install pwntools keystone-engine unicorn capstone ropper && \
-mkdir tools && cd tools && \
-git clone https://github.com/JonathanSalwan/ROPgadget && \
-git clone https://github.com/radare/radare2 && cd radare2 && sys/install.sh && \
-cd .. && git clone https://github.com/pwndbg/pwndbg && cd pwndbg && git checkout stable && ./setup.sh && \
-cd .. && git clone https://github.com/niklasb/libc-database && cd libc-database && ./get && \
-gem install one_gadget
+RUN dpkg --add-architecture i386
+RUN apt-get update
+RUN apt-get install -y build-essential jq strace ltrace curl wget rubygems gcc dnsutils netcat gcc-multilib net-tools vim gdb gdb-multiarch
+RUN apt-get install -y python3 python3-dev libssl-dev
+RUN apt-get install -y libffi-dev wget git make procps libpcre3-dev libdb-dev libxt-dev libxaw7-dev python-pip libc6:i386 libncurses5:i386 libstdc++6:i386
+RUN apt-get install -y python3-pip
+RUN pip install capstone requests pwntools r2pipe 
+RUN pip3 install pwntools keystone-engine unicorn capstone ropper
+RUN mkdir tools && cd tools
+RUN git clone https://github.com/JonathanSalwan/ROPgadget
+RUN git clone https://github.com/radare/radare2 && cd radare2 && sys/install.sh 
+RUN cd .. && git clone https://github.com/pwndbg/pwndbg && cd pwndbg && ./setup.sh
+RUN gem install one_gadget