diff --git a/.header b/.header
index f64e3ff55..7e8b2fb8b 100644
--- a/.header
+++ b/.header
@@ -1,4 +1,4 @@
-// Copyright 2017 The prometheus-operator Authors
+// Copyright 2018 The prometheus-operator Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/Makefile b/Makefile
index f0eb18d1f..b238b3e09 100644
--- a/Makefile
+++ b/Makefile
@@ -66,7 +66,7 @@ docs: embedmd po-docgen
 	$(GOPATH)/bin/po-docgen compatibility > Documentation/compatibility.md
 
 generate: jsonnet-docker
-	docker run --rm -v `pwd`:/go/src/github.com/coreos/prometheus-operator po-jsonnet make generate-deepcopy jsonnet generate-bundle docs generate-kube-prometheus
+	docker run --rm -v `pwd`:/go/src/github.com/coreos/prometheus-operator po-jsonnet make generate-deepcopy generate-openapi jsonnet generate-bundle docs generate-kube-prometheus
 
 deepcopy-gen:
 	go get -u -v -d k8s.io/code-generator/cmd/deepcopy-gen
@@ -82,8 +82,8 @@ openapi-gen:
 	cd $(GOPATH)/src/k8s.io/code-generator; git checkout release-1.8
 	go install k8s.io/code-generator/cmd/openapi-gen
 
-generate-openapi:
-	openapi-gen  -i github.com/coreos/prometheus-operator/pkg/client/monitoring/v1,k8s.io/apimachinery/pkg/apis/meta/v1,k8s.io/api/core/v1  -p github.com/coreos/prometheus-operator/pkg/client/monitoring/v1
+generate-openapi: openapi-gen
+	openapi-gen  -i github.com/coreos/prometheus-operator/pkg/client/monitoring/v1,k8s.io/apimachinery/pkg/apis/meta/v1,k8s.io/api/core/v1  -p github.com/coreos/prometheus-operator/pkg/client/monitoring/v1 --go-header-file="$(GOPATH)/src/github.com/coreos/prometheus-operator/.header"
 
 generate-bundle:
 	hack/generate-bundle.sh
diff --git a/pkg/client/monitoring/v1/zz_generated.deepcopy.go b/pkg/client/monitoring/v1/zz_generated.deepcopy.go
index d40cde60b..5a50b36d6 100644
--- a/pkg/client/monitoring/v1/zz_generated.deepcopy.go
+++ b/pkg/client/monitoring/v1/zz_generated.deepcopy.go
@@ -1,6 +1,6 @@
 // +build !ignore_autogenerated
 
-// Copyright 2017 The prometheus-operator Authors
+// Copyright 2018 The prometheus-operator Authors
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.