diff --git a/Dockerfile b/Dockerfile
index 1ad296d..530be70 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -8,4 +8,8 @@ RUN apt-get -qq update && apt-get -qq -y --no-install-recommends install \
     cmake \
     git \
     debhelper \
-    devscripts
+    devscripts \
+    bash && \
+    apt-get autoclean && \
+    rm -rf /var/lib/apt/lists/* && \
+    ln -sf /bin/bash /bin/sh