diff --git a/.travis.yml b/.travis.yml
index e8c3f56a..5bc54516 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,7 +5,7 @@ cache:
 notifications:
   email: true
 node_js:
-  - '10'
+  - '8'
 script:
   - npm test
   - npm run demo
diff --git a/package-lock.json b/package-lock.json
index 8d46f99c..71a2a16f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -6327,9 +6327,9 @@
       }
     },
     "execa": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/execa/-/execa-4.0.0.tgz",
-      "integrity": "sha512-JbDUxwV3BoT5ZVXQrSVbAiaXhXUkIwvbhPIwZ0N13kX+5yCzOhUNdocxB/UQRuYOHRYYwAxKYwJYc0T4D12pDA==",
+      "version": "3.4.0",
+      "resolved": "https://registry.npmjs.org/execa/-/execa-3.4.0.tgz",
+      "integrity": "sha512-r9vdGQk4bmCuK1yKQu1KTwcT2zwfWdbdaXfCtAh+5nU/4fSX+JAb7vZGvI5naJrQlvONrEB20jeruESI69530g==",
       "requires": {
         "cross-spawn": "^7.0.0",
         "get-stream": "^5.0.0",
@@ -6338,6 +6338,7 @@
         "merge-stream": "^2.0.0",
         "npm-run-path": "^4.0.0",
         "onetime": "^5.1.0",
+        "p-finally": "^2.0.0",
         "signal-exit": "^3.0.2",
         "strip-final-newline": "^2.0.0"
       },
@@ -6371,9 +6372,9 @@
           "integrity": "sha512-OqbOk5oEQeAZ8WXWydlu9HJjz9WVdEIvamMCcXmuqUYjTknH/sqsWvhQ3vgwKFRR1HpjvNBKQ37nbJgYzGqGcg=="
         },
         "npm-run-path": {
-          "version": "4.0.0",
-          "resolved": "https://registry.npmjs.org/npm-run-path/-/npm-run-path-4.0.0.tgz",
-          "integrity": "sha512-8eyAOAH+bYXFPSnNnKr3J+yoybe8O87Is5rtAQ8qRczJz1ajcsjg8l2oZqP+Ppx15Ii3S1vUTjQN2h4YO2tWWQ==",
+          "version": "4.0.1",
+          "resolved": "https://registry.npmjs.org/npm-run-path/-/npm-run-path-4.0.1.tgz",
+          "integrity": "sha512-S48WzZW777zhNIrn7gxOlISNAqi9ZC/uQFnRdbeIHhZhCA6UqpkOT8T1G7BvfdgP4Er8gF4sUbaS0i7QvIfCWw==",
           "requires": {
             "path-key": "^3.0.0"
           }
@@ -6386,6 +6387,11 @@
             "mimic-fn": "^2.1.0"
           }
         },
+        "p-finally": {
+          "version": "2.0.1",
+          "resolved": "https://registry.npmjs.org/p-finally/-/p-finally-2.0.1.tgz",
+          "integrity": "sha512-vpm09aKwq6H9phqRQzecoDpD8TmVyGw70qmWlyq5onxY7tqyTTFVvxMykxQSQKILBSFlbXpypIw2T1Ml7+DDtw=="
+        },
         "path-key": {
           "version": "3.1.1",
           "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
diff --git a/package.json b/package.json
index 7f7accdb..cfc8bb77 100644
--- a/package.json
+++ b/package.json
@@ -115,7 +115,7 @@
     "bluebird": "3.7.1",
     "check-more-types": "2.24.0",
     "debug": "4.1.1",
-    "execa": "4.0.0",
+    "execa": "3.4.0",
     "lazy-ass": "1.6.0",
     "ps-tree": "1.2.0",
     "wait-on": "4.0.0"