diff --git a/.docker/Dockerfile b/.docker/Dockerfile
index 439e24a7..4316b83f 100644
--- a/.docker/Dockerfile
+++ b/.docker/Dockerfile
@@ -5,6 +5,7 @@ FROM      ubuntu:18.04
 RUN apt-get update && apt-get install -y --no-install-recommends \
   build-essential autoconf automake libtool \
   libexempi3 \
+  libleptonica-dev \
   ocrmypdf \
   pngquant \
   python3-pip \