diff --git a/Containerfile b/Containerfile
index 06d432d..2debd60 100644
--- a/Containerfile
+++ b/Containerfile
@@ -9,5 +9,7 @@ ADD danted.conf.template /etc/dante/danted.conf.template
 ADD run-danted.sh /custom-services.d/run-danted.sh
 
 RUN apk update
-RUN apk add dante-server
+RUN apk add \
+  dante-server \
+  gettext-envsubst