diff --git a/Dockerfile b/Dockerfile
index 4f305d2..32e0f9d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,7 +16,7 @@ RUN apt-get install --no-install-recommends -y \
                        tar bzip2 curl dosfstools mtools parted \
                        syslinux tree python3-pip bc python3-yaml \
                        lsb-release python3-setuptools ssh-client \
-                       vim less mercurial iproute2 xz-utils && \
+                       vim less mercurial iproute2 xz-utils gnupg && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*