diff --git a/Dockerfile b/Dockerfile
index f4b69ae..0f0abbb 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # ------------------------------------------------------------------------
-from mcluseau/golang-builder:1.14.1 as build
+from mcluseau/golang-builder:1.15.1 as build
 
 # ------------------------------------------------------------------------
 from debian:stretch
diff --git a/modd.conf b/modd.conf
index 4ed5d6c..7ac93a8 100644
--- a/modd.conf
+++ b/modd.conf
@@ -4,3 +4,7 @@
   prep: docker build --build-arg GOPROXY=$GOPROXY -t dls .
   #daemon +sigterm: /var/lib/direktil/test-run
 }
+
+**/*.proto !dist/**/* {
+  prep: for mod in @mods; do protoc -I ./ --go_out=plugins=grpc,paths=source_relative:. $mod; done
+}