diff --git a/controller/Dockerfile b/controller/Dockerfile
index 9bac456..98a818e 100644
--- a/controller/Dockerfile
+++ b/controller/Dockerfile
@@ -48,6 +48,7 @@ FROM debian:bookworm-slim
 RUN apt-get update && apt-get install -y --no-install-recommends \
     ca-certificates \
     curl \
+    gnupg \
     git \
     restic \
     postgresql-client \