diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index 9f6f358..0000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,40 +0,0 @@
-version: 2
-machine:
-  docker_layer_caching: true
-dependencies:
-  cache_directories:
-  - "~/docker-images"
-  - "/go/pkg/mod"
-jobs:
-  build:
-    working_directory: /go/src/github.com/im-kulikov/helium
-    docker:
-    # CircleCI Go images available at: https://hub.docker.com/r/circleci/golang/
-    - image: circleci/golang:1.11
-    # CircleCI Redis images available at: https://hub.docker.com/r/circleci/redis/
-    - image: circleci/redis:alpine
-    # CircleCI PostgreSQL images available at: https://hub.docker.com/r/circleci/postgres/
-    - image: circleci/postgres:alpine-ram
-      environment:
-        POSTGRES_USER: postgres
-        POSTGRES_PASSWORD: postgres
-        POSTGRES_DB: postgres
-    environment:
-    - GO111MODULE=on
-    steps:
-    - run: git config --global url.ssh://git@github.com/im-kulikov.insteadOf https://github.com/im-kulikov
-    - checkout
-    - restore_cache:
-        keys:
-        - go-mod-v1-{{ checksum "go.sum" }}
-    - run:
-        name: download-libraries
-        command: |
-          go mod tidy
-          go mod download
-    - save_cache:
-        key: go-mod-v1-{{ checksum "go.sum" }}
-        paths:
-        - "/go/pkg/mod"
-    - run: go test -v -cover -coverprofile=helium.coverprofile ./...
-    - run: bash -c "bash <(curl -s https://codecov.io/bash) -f helium.coverprofile -t $(CODECOV_TOKEN)"
\ No newline at end of file
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..ccf0449
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1,17 @@
+language: go
+go:
+  - 1.11.x
+  - 1.12.x
+env:
+  - GO111MODULE=on
+install:
+  - go get -v golang.org/x/lint/golint
+  - go mod tidy -v
+script:
+  - golint -set_exit_status ./...
+  - go test -coverprofile=coverage.txt -covermode=atomic ./...
+after_success:
+  - bash <(curl -s https://codecov.io/bash)
+matrix:
+  allow_failures:
+    - go: tip
\ No newline at end of file
diff --git a/README.md b/README.md
index 2b4cd16..7b0611c 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # Helium
 
 ![Codecov](https://img.shields.io/codecov/c/github/im-kulikov/helium.svg?style=flat-square)
-![CircleCI (all branches)](https://img.shields.io/circleci/project/github/im-kulikov/helium.svg?style=flat-square)
+[![Build Status](https://travis-ci.com/im-kulikov/helium.svg?branch=master)](https://travis-ci.com/im-kulikov/helium)
 [![Report](https://goreportcard.com/badge/github.com/im-kulikov/helium)](https://goreportcard.com/report/github.com/im-kulikov/helium)
 [![GitHub release](https://img.shields.io/github/release/im-kulikov/helium.svg)](https://github.com/im-kulikov/helium)
 ![GitHub](https://img.shields.io/github/license/im-kulikov/helium.svg?style=popout)
diff --git a/examples/demo4/main.go b/examples/demo4/main.go
index e367e5e..e8bbcb8 100644
--- a/examples/demo4/main.go
+++ b/examples/demo4/main.go
@@ -45,7 +45,7 @@ func handler() http.Handler {
 	return h
 }
 
-func runner(s mserv.Server, l *zap.Logger, ctx context.Context) {
+func runner(ctx context.Context, s mserv.Server, l *zap.Logger) {
 	l.Info("run servers")
 	s.Start()