diff --git a/Dockerfile b/Dockerfile
index 103683f..b9d701d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -9,7 +9,7 @@ ENV DISABLE_ORGANIZATION=false
 ENV PDF_DEMO_LINK=true
 
 RUN apt update && \
-    apt install -y gettext-base librsvg2-bin pdftk imagemagick potrace && \
+    apt install -y gettext-base librsvg2-bin pdftk imagemagick potrace ghostscript && \
     rm -rf /var/lib/apt/lists/*
 
 COPY . /usr/local/signaturepdf