diff --git a/Dockerfile b/Dockerfile
index 55867ca..2f26c8f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,6 +29,8 @@ RUN apt update && \
 ARG BUILD_BASE_IMAGE=alpine:latest
 FROM ${BUILD_BASE_IMAGE}
 
+ARG BUILD_APP_USER
+
 COPY --from=builder /app/hibp/build/gcc/release/* /usr/local/bin/
 
 WORKDIR /app