diff --git a/docker/php/Dockerfile b/docker/php/Dockerfile
index a884650c..fffd868d 100644
--- a/docker/php/Dockerfile
+++ b/docker/php/Dockerfile
@@ -18,6 +18,8 @@ RUN apk add --no-cache \
     graphicsmagick \
     gifsicle \
     ffmpeg \
+    djvulibre \
+    ghostscript \
     bind-tools \
     gettext \
     gettext-dev \