diff --git a/odoo/odoo/Dockerfile.10 b/odoo/odoo/Dockerfile.10
index 3bc414e..aae5756 100644
--- a/odoo/odoo/Dockerfile.10
+++ b/odoo/odoo/Dockerfile.10
@@ -1,6 +1,10 @@
 FROM debian:jessie
 MAINTAINER Yaltik - Fabien Bourgeois <fabien@yaltik.com>
 
+# http://bugs.python.org/issue19846
+# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
+ENV LANG C.UTF-8
+
 # Odoo dependencies from Debian APT repository
 RUN apt-get update \
       && apt-get install -y --no-install-recommends \
diff --git a/odoo/odoo/Dockerfile.11 b/odoo/odoo/Dockerfile.11
index 9f53662..1b427e5 100644
--- a/odoo/odoo/Dockerfile.11
+++ b/odoo/odoo/Dockerfile.11
@@ -1,6 +1,10 @@
 FROM python:3.6-stretch
 MAINTAINER Yaltik - Fabien Bourgeois <fabien@yaltik.com>
 
+# http://bugs.python.org/issue19846
+# > At the moment, setting "LANG=C" on a Linux system *fundamentally breaks Python 3*, and that's not OK.
+ENV LANG C.UTF-8
+
 # Odoo dependencies from Debian APT repository
 RUN apt-get update \
       && apt-get install -y --no-install-recommends \