diff --git a/Dockerfile b/Dockerfile
index e6e7597..cd29147 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,14 +1,18 @@
 FROM ubuntu:latest as builder
 
-RUN mkdir -p /tmp/build /tmp/src
 COPY *.h *.cpp *.h.in CMakeLists.txt /tmp/src/
 
-
 RUN apt-get update && apt-get install -y g++ cmake make libcurl4-openssl-dev libxml2-dev libssl-dev && \
-    cd /tmp/build && cmake -DCMAKE_BUILD_TYPE=Release ../src && make install
+    cd /tmp/src && cmake -DCMAKE_BUILD_TYPE=Release . && make && \
+    make install DESTDIR=/tmp/build && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
 
 FROM ubuntu:latest
-RUN apt-get update && apt-get install -y libxml2 libcurl4
-COPY --from=builder /tmp/build/SpeedTest /usr/local/bin
+RUN apt-get update && apt-get install -y libxml2 libcurl4 && \
+    apt-get clean && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY --from=builder /tmp/build/ /
 
 ENTRYPOINT ["/usr/local/bin/SpeedTest"]