diff --git a/docker/bionic/Dockerfile b/docker/bionic/Dockerfile
index 997af31..961a0df 100644
--- a/docker/bionic/Dockerfile
+++ b/docker/bionic/Dockerfile
@@ -18,7 +18,8 @@ RUN apt-get -y install sudo
 # travis xenial bionic
 RUN apt-get install -yq --no-install-suggests --no-install-recommends \
     python-setuptools libssl-dev libpq-dev python-prctl python-dev \
-    python-dev python-virtualenv python-pip virtualenv
+    python-dev python-virtualenv python-pip virtualenv \
+    shutil
 
 # travis focal
 RUN apt-get install -yq --no-install-suggests --no-install-recommends \
@@ -36,7 +37,7 @@ RUN apt-get install -yq --no-install-suggests --no-install-recommends \
 RUN apt-get install -yq --no-install-suggests --no-install-recommends \
     pylint python-pycodestyle python3-pycodestyle pycodestyle python-flake8 \
     python3-flake8 flake8 python-pyflakes python3-pyflakes pyflakes pyflakes3 \
-    curl
+    curl shellcheck
 
 # Wine32
 RUN apt-get install -yq --no-install-suggests --no-install-recommends \
@@ -58,7 +59,6 @@ RUN apt-get install -yq --no-install-suggests --no-install-recommends \
 # .travis.yml
 RUN apt-get install -yq --no-install-suggests --no-install-recommends \
     build-essential libcap-dev tor
-    
 
 # locales
 RUN apt-get install -yq --no-install-suggests --no-install-recommends \