diff --git a/.travis.yml b/.travis.yml
index f40035c..6c7b6b9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,22 +5,25 @@ os:
   - osx
 
 go:
-  - 1.9.x
-  - 1.10.x
   - 1.11.x
   - 1.12.x
+  - 1.13.x
   - tip
 
 matrix:
   allow_failures:
     - go: tip
 
+env:
+  global:
+    GO111MODULE=on
+
 before_install:
-  - if [[ $TRAVIS_GO_VERSION == 1.12* ]]; then go get github.com/axw/gocov/gocov github.com/mattn/goveralls; fi
+  - if [[ $TRAVIS_GO_VERSION == 1.13* ]]; then go get github.com/axw/gocov/gocov github.com/mattn/goveralls; fi
 
 script:
   - go test -v -tags ci ./...
-  - if [[ $TRAVIS_GO_VERSION == 1.12* ]]; then $GOPATH/bin/goveralls -service=travis-ci -ignore="examples/colorpalette/main.go,examples/simple/main.go"; fi
+  - if [[ $TRAVIS_GO_VERSION == 1.13* ]]; then $GOPATH/bin/goveralls -service=travis-ci -ignore="examples/colorpalette/main.go,examples/simple/main.go"; fi
 
 notifications:
   email: