diff --git a/build-unit-test-docker.sh b/build-unit-test-docker.sh
index 499c17c..28b8c23 100755
--- a/build-unit-test-docker.sh
+++ b/build-unit-test-docker.sh
@@ -147,7 +147,8 @@
     libpam0g-dev \
     xxd \
     libi2c-dev \
-    wget
+    wget \
+    libldap2-dev
 
 RUN pip install inflection
 RUN pip install pycodestyle