diff --git a/docker/backend/Dockerfile b/docker/backend/Dockerfile
index ca5d79eca..160623630 100644
--- a/docker/backend/Dockerfile
+++ b/docker/backend/Dockerfile
@@ -10,7 +10,8 @@ RUN apt-get -y update && apt-get -y install locales locales-all
 
 # run-time dependencies for uniworx binary
 RUN apt-get -y update && apt-get -y install fonts-roboto
-RUN apt-get -y update && apt-get -y install texlive-luatex
+RUN apt-get -y update && apt-get -y install pdftk
+RUN apt-get -y update && apt-get -y install texlive-base luatex
 
 ENV LANG=en_US.UTF-8