diff --git a/Dockerfile b/Dockerfile
index d0acec101..60f3374e7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -56,7 +56,6 @@ ARG RUNTIME_PACKAGES="\
   curl \
   file \
   # fonts for text file thumbnail generation
-  default-libmysqlclient-dev \
   fonts-liberation \
   gettext \
   ghostscript \
@@ -78,10 +77,12 @@ ARG RUNTIME_PACKAGES="\
   libraqm0 \
   libgnutls30 \
   libjpeg62-turbo \
+  optipng \
   python3 \
   python3-pip \
   python3-setuptools \
   postgresql-client \
+  mariadb-client \
   # For Numpy
   libatlas3-base \
   # OCRmyPDF dependencies
@@ -187,7 +188,7 @@ COPY Pipfile* ./
 ARG BUILD_PACKAGES="\
   build-essential \
   git \
-  mariadb-client \
+  default-libmysqlclient-dev \
   python3-dev"
 
 RUN set -eux \