diff --git a/Dockerfile b/Dockerfile
index 64dd5ee..cdca37a 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,7 +15,7 @@ RUN echo "APT::Install-Recommends \"false\";\nAPT::Install-Suggests \"false\";"
   DEBIAN_FRONTEND="noninteractive" apt-get -y update && \
   DEBIAN_FRONTEND="noninteractive" apt-get -y upgrade && \
   DEBIAN_FRONTEND="noninteractive" apt-get -y install \
-    wget ca-certificates \
+    wget ca-certificates gnupg \
     libcgi-emulate-psgi-perl libcgi-simple-perl libconfig-inifiles-perl \
     libdbd-pg-perl libdbi-perl libdata-uuid-perl libdatetime-perl \
     libdatetime-format-strptime-perl libio-stringy-perl \