diff --git a/Dockerfile b/Dockerfile
index c03ba841..26f42855 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,11 +4,15 @@ FROM debian:9.6-slim
 LABEL author=frappé
 
 # Set locale C.UTF-8 for mariadb and general locale data
-ENV LANG C.UTF-8
+ENV PYTHONIOENCODING=utf-8
+ENV LANGUAGE=en_US.UTF-8
+ENV LANG=en_US.UTF-8
+ENV LC_ALL=en_US.UTF-8
+RUN locale-gen en_US.UTF-8
 
 # Install all neccesary packages
 RUN apt-get update && apt-get install -y --no-install-suggests --no-install-recommends build-essential cron curl git \
-  libffi-dev liblcms2-dev libldap2-dev libmariadbclient-dev libsasl2-dev libssl-dev libtiff5-dev libwebp-dev mariadb-client \
+  libffi-dev liblcms2h-dev libldap2-dev libmariadbclient-dev libsasl2-dev libssl-dev libtiff5-dev libwebp-dev mariadb-client \
   iputils-ping python-dev python-pip python-setuptools python-tk redis-tools rlwrap software-properties-common sudo tk8.6-dev \
   vim xfonts-75dpi xfonts-base wget wkhtmltopdf \
   && apt-get clean && rm -rf /var/lib/apt/lists/* \
@@ -18,9 +22,10 @@ RUN apt-get update && apt-get install -y --no-install-suggests --no-install-reco
   && npm install -g yarn
 
 # Add frappe user and setup sudo
-RUN useradd -ms /bin/bash -G sudo frappe \
+RUN groupadd -g 500 frappe \
+  && useradd -ms /bin/bash -u 500 -G 500 sudo frappe \
   && printf '# Sudo rules for frappe\nfrappe ALL=(ALL) NOPASSWD:ALL' > /etc/sudoers.d/frappe \
-  && chown -R frappe:frappe /home/frappe
+  && chown -R 500:500 /home/frappe
 
 # Install bench
 RUN pip install -e git+https://github.com/frappe/bench.git#egg=bench --no-cache