diff --git a/.travis.yml b/.travis.yml
index 98b89bc..a3a8d86 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,6 +11,10 @@ matrix:
     env: V_REQUEST=latest
   - node_js: "6"
     env: V_REQUEST=latest
+  - node_js: "8"
+    env: V_REQUEST=latest
+  - node_js: "10"
+    env: V_REQUEST=latest
 
 before_install:
   - npm install tough-cookie
diff --git a/package.json b/package.json
index a8e1e28..7c90e6f 100644
--- a/package.json
+++ b/package.json
@@ -35,7 +35,7 @@
   "dependencies": {
     "request-promise-core": "1.1.1",
     "stealthy-require": "^1.1.1",
-    "tough-cookie": "^2.5.0"
+    "tough-cookie": "~2.3.3"
   },
   "peerDependencies": {
     "request": "^2.34"