diff --git a/Dockerfile b/Dockerfile
index c21ea03..abac5a4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ RUN apt-get update -y && apt-get install -y cmake git g++ libtbb-dev libmpfr-dev
 
 RUN git clone --depth 1 https://github.com/TLCFEM/vpmr.git
 
-WORKDIR vpmr
+WORKDIR /vpmr
 
 RUN git submodule update --init --recursive
 RUN cd eigen && git apply ../patch_size.patch && cd ..
@@ -13,7 +13,7 @@ RUN mkdir build && cd build && cmake -DCMAKE_BUILD_TYPE=Release .. && make
 
 FROM ubuntu:22.04 as runtime
 
-RUN apt-get update -y && apt-get install -y libtbb12 libmpfr6 libgmp10
+RUN apt-get update -y && apt-get install -y libtbb12 libmpfr6 libgmp10 && apt-get clean -y
 
 COPY --from=build /vpmr/build/vpmr /usr/local/bin/vpmr