diff --git a/lcthw-remnants-2/Dockerfile b/lcthw-remnants-2/Dockerfile
index 7e4b38c..0ccf6c0 100644
--- a/lcthw-remnants-2/Dockerfile
+++ b/lcthw-remnants-2/Dockerfile
@@ -2,8 +2,10 @@ FROM ubuntu:xenial
 
 ENV DEBIAN_FRONTEND noninteractive
 
+WORKDIR /app
+
 RUN apt-get update -yq
-RUN apt-get install -yq \
+RUN apt-get install -yq --no-install-recommends --no-install-suggests \
   build-essential \
   curl \
   file \
@@ -11,4 +13,8 @@ RUN apt-get install -yq \
   git \
   man \
   sudo \
-  vim-tiny
+  vim-tiny \
+  zsh
+RUN echo "kernel.yama.ptrace_scope = 0" > /etc/sysctl.d/10-ptrace.conf
+
+CMD ["zsh", "-l"]
diff --git a/lcthw-remnants-2/Makefile b/lcthw-remnants-2/Makefile
index aa99152..b9b8c93 100644
--- a/lcthw-remnants-2/Makefile
+++ b/lcthw-remnants-2/Makefile
@@ -26,4 +26,4 @@ docker-image:
 
 .PHONY: docker-run
 docker-run:
-	docker run -it -v $(PWD):/app meatballhat/lcthw:latest bash -l
+	docker run -it -v $(PWD):/app meatballhat/lcthw