diff --git a/.travis.yml b/.travis.yml
index 92d47b697..1952dfeed 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,6 +1,11 @@
 defaults_go: &DEFAULTS_GO
   language: go
   go: "1.11.4"
+  cache:
+    directories:
+      # https://restic.net/blog/2018-09-02/travis-build-cache
+      - $HOME/.cache/go-build
+      - $HOME/gopath/pkg/mod
 
 defaults_js: &DEFAULTS_JS
   language: node_js
diff --git a/Makefile b/Makefile
index 13f4401b9..cee5162d2 100644
--- a/Makefile
+++ b/Makefile
@@ -51,7 +51,7 @@ endif
 bindata_assetfs.go: .build/deps-build-go.ok .build/artifacts-bindata_assetfs.$(GO_BINDATA_MODE) .build/artifacts-ui.ok
 	go-bindata-assetfs -o bindata_assetfs.go -nometadata ui/build/... ui/src/...
 
-$(NAME): .build/deps-build-go.ok bindata_assetfs.go $(SOURCES)
+$(NAME): .build/deps-build-go.ok go.mod bindata_assetfs.go $(SOURCES)
 	GO111MODULE=on go build -ldflags "-X main.version=$(VERSION)"
 
 .PHONY: clean