diff --git a/.circleci/config.yml b/.circleci/config.yml
deleted file mode 100644
index 8512378..0000000
--- a/.circleci/config.yml
+++ /dev/null
@@ -1,6 +0,0 @@
-version: 2
-jobs:
-    build:
-        - add_ssh_keys:
-            fingerprints:
-                - "97:3c:3d:6b:75:e6:b2:86:c6:02:b1:eb:db:03:29:b9"
diff --git a/.travis.yml b/.travis.yml
index 42613cb..706c5f5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -9,14 +9,9 @@ addons:
 env:
   - CXX=g++-4.8
 node_js:
-  - "0.12"
-  - "0.11"
-  - "0.10"
-  - "1"
-  - "2"
-  - "3"
   - "4"
   - "5"
   - "6"
+  - "8"
 script: make test-cov
 after_script: npm install codecov && cat ./coverage/lcov.info | ./node_modules/codecov/bin/codecov
diff --git a/README.md b/README.md
index b4850ab..950b12f 100644
--- a/README.md
+++ b/README.md
@@ -227,4 +227,4 @@ All tests are within `tests`.
 
 Run tests using `make test` or `make test-cov` for test coverage.
 
-TravisCI build is tested against all versions `<= 6.x`
+TravisCI build is tested against all versions `>= 4.x`