diff --git a/Dockerfile b/Dockerfile
index e4986f43..6a05305c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -16,7 +16,8 @@ RUN apk add --no-cache --virtual .bin-deps \
     curl \
     jq \
     openssl \
-    socat
+    socat \
+    bind-tools
 
 # Install docker-gen from the nginxproxy/docker-gen image
 COPY --from=docker-gen /usr/local/bin/docker-gen /usr/local/bin/