diff --git a/Dockerfile b/Dockerfile
index b66e3d0..83f6dab 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -102,6 +102,7 @@ RUN echo "**** apply calibre-web patches ****" 1>&2 \
 RUN echo "**** build & install calibre-web  ****" 1>&2 \
      && . /app/bin/activate \
      && cd /app/calibreweb \
+     && pip3 install --no-cache simpleldap \
      && pip3 install --no-cache \
                      -r requirements.txt \
                      -r optional-requirements.txt 
@@ -151,7 +152,7 @@ RUN \
   && apt install -y libnss3 \
   && apt install -y imagemagick \
   && apt install -y bash \
-  && apt install -y sudo \
+  && apt install -y procps \
   && apt install -y python3
 
 
@@ -170,12 +171,10 @@ RUN rm -rf /var/lib/apt/lists/* \
 
 RUN yes | /app/bin/pip3 uninstall google-api-python-client
 RUN yes | /app/bin/pip3 uninstall gevent
-RUN yes | /app/bin/pip3 uninstall  greenlet
+RUN yes | /app/bin/pip3 uninstall greenlet
 RUN yes | /app/bin/pip3 uninstall httplib2
 RUN yes | /app/bin/pip3 uninstall oauth2client
 RUN yes | /app/bin/pip3 uninstall uritemplate
-RUN yes | /app/bin/pip3 uninstall pyasn1-modules
-RUN yes | /app/bin/pip3 uninstall pyasn1
 RUN yes | /app/bin/pip3 uninstall PyDrive2
 RUN yes | /app/bin/pip3 uninstall PyYAML
 RUN yes | /app/bin/pip3 uninstall rsa