diff --git a/packagingbuild/bionic/Dockerfile b/packagingbuild/bionic/Dockerfile
index ebc07be..13ab0b2 100644
--- a/packagingbuild/bionic/Dockerfile
+++ b/packagingbuild/bionic/Dockerfile
@@ -44,9 +44,9 @@ RUN apt-get update && \
         python python-virtualenv \
         python3 python3-virtualenv python3-pip
 
-
-RUN apt-get -y install \
-        devscripts debhelper dh-make && apt-get clean
+RUN apt-get update && \
+    apt-get -y install \
+        devscripts debhelper dh-make libldap2-dev libsasl2-dev && apt-get clean
 
 # Install fresh pip and co
 RUN curl https://bootstrap.pypa.io/get-pip.py | python3 - virtualenv==16.6.0 pip==19.1.1 wheel setuptools; \
diff --git a/packagingbuild/xenial/Dockerfile b/packagingbuild/xenial/Dockerfile
index a43c719..fcd2a5b 100644
--- a/packagingbuild/xenial/Dockerfile
+++ b/packagingbuild/xenial/Dockerfile
@@ -43,8 +43,9 @@ RUN apt-get update && \
     apt-get -y install build-essential python-dev python python-virtualenv
 
 
-RUN apt-get -y install \
-        devscripts debhelper dh-make && apt-get clean
+RUN apt-get update && \
+    apt-get -y install \
+        devscripts debhelper dh-make libldap2-dev libsasl2-dev && apt-get clean
 
 # Install fresh pip and co
 RUN curl https://bootstrap.pypa.io/get-pip.py | python - virtualenv==16.6.0 pip==19.1.1 wheel setuptools; \