diff --git a/Dockerfile b/Dockerfile
index db25859..19c857d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -45,6 +45,7 @@ RUN apk --update --no-cache add \
     php7-fpm \
     php7-gd \
     php7-json \
+    php7-ldap \
     php7-mbstring \
     php7-mcrypt \
     php7-memcached \