diff --git a/docker/php/Dockerfile b/docker/php/Dockerfile
index ab5bd85da..bd5718d03 100644
--- a/docker/php/Dockerfile
+++ b/docker/php/Dockerfile
@@ -14,6 +14,7 @@ COPY supervisord.conf /etc/supervisor/conf.d/supervisord.conf
 RUN apt-get update && apt-get install -y \
     supervisor \
     git \
+    lsof \
     curl \
     vim \
     libpng-dev \