diff --git a/.docker/prod-oldstable.Dockerfile b/.docker/prod-oldstable.Dockerfile
index 3a7b37be..7038270e 100644
--- a/.docker/prod-oldstable.Dockerfile
+++ b/.docker/prod-oldstable.Dockerfile
@@ -38,6 +38,7 @@ ARG DEBIAN_FRONTEND=noninteractive
 
 RUN apt-get update && \
   apt-get install -y --no-install-recommends \
+  libcjson1 \
   libglib2.0-0 \
   libgpgme11 \
   libgnutls30 \