diff --git a/Dockerfile b/Dockerfile
index 88edc4a2..4852cde4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,6 +13,7 @@ RUN apk --no-cache add -f \
   tar \
   libidn \
   jq \
+  yq \
   cronie
 
 ENV LE_WORKING_DIR=/acmebin