diff --git a/.travis.yml b/.travis.yml
index bfc1154..10fc75d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,8 +5,13 @@ sudo: false
 matrix:
   include:
     - go: 1.x
-      env: RELEASE=true
+      env:
+        - RELEASE=true
+        - GO111MODULE=on
     - go: master
+      env:
+        - RELEASE=false
+        - GO111MODULE=on
   allow_failures:
     - go: master
 
diff --git a/Dockerfile b/Dockerfile
index e52eb18..0e4a7be 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -3,6 +3,7 @@ RUN apk --no-cache --update upgrade && apk --no-cache add git
 
 ADD . /go/src/github.com/mback2k/smtp-dkim-signer
 WORKDIR /go/src/github.com/mback2k/smtp-dkim-signer
+ENV GO111MODULE on
 
 RUN go get
 RUN go build -ldflags="-s -w"