diff --git a/Dockerfile b/Dockerfile
index 9db30a1..0318316 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,11 +1,12 @@
 FROM ubuntu:latest
 
-RUN apt-get update && apt-get install -y \
-    groff \
-    python-pip \
+RUN set -xe \
+  && apt-get update -y \
+  && apt-get install -y python3-pip \
   && apt-get clean \
   && rm -rf /var/lib/apt/lists/*
 
-RUN pip install saws
+RUN pip3 install --upgrade pip
+RUN pip3 install saws
 
 ENTRYPOINT ["saws"]