diff --git a/Dockerfile b/Dockerfile
index 378bd87..2a8edab 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -5,7 +5,8 @@ ARG VERSION=2.2.0
 RUN apt-get update
 RUN apt-get install -y \
   curl \
-  ca-certificates
+  ca-certificates \
+  gnupg
 
 RUN curl -fsSL https://releases.hyperion-project.org/hyperion.pub.key | gpg --dearmor \
   -o /usr/share/keyrings/hyperion.pub.gpg