diff --git a/Dockerfile.dapper b/Dockerfile.dapper
index c1c944b..9b28b5f 100644
--- a/Dockerfile.dapper
+++ b/Dockerfile.dapper
@@ -2,7 +2,7 @@ FROM ubuntu:16.04
 # FROM arm64=aarch64/ubuntu:16.04 arm=armhf/ubuntu:16.04
 
 RUN apt-get update \
-    && apt-get install -y build-essential wget libncurses5-dev unzip bc curl python rsync ccache git vim libssl-dev kmod gnupg2
+    && apt-get install -y build-essential wget libncurses5-dev unzip bc curl python rsync ccache git vim libssl-dev kmod gnupg2 locales
 
 # Install dapper
 RUN curl -sL https://releases.rancher.com/dapper/latest/dapper-$(uname -s)-$(uname -m | sed 's/arm.*/arm/') > /usr/bin/dapper \