diff --git a/images/permissions/Dockerfile b/images/permissions/Dockerfile
index 6037370f..26929b16 100755
--- a/images/permissions/Dockerfile
+++ b/images/permissions/Dockerfile
@@ -1,9 +1,14 @@
 FROM debian:stable-slim
 LABEL maintainer="enrico.simonetti@gmail.com"
 
+RUN apt-get update \
+    && apt-get install -y \
+    adduser
+
 RUN adduser sugar --disabled-password --disabled-login --gecos ""
 
 COPY apps/sugarfixpermissions /usr/local/bin/sugarfixpermissions
 RUN chmod +x /usr/local/bin/sugarfixpermissions
 
 CMD ["/usr/local/bin/sugarfixpermissions"]
+