diff --git a/.travis.yml b/.travis.yml
index d7f5c7f21..2630e5c25 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -11,8 +11,9 @@ install:
   - yarn build
   - yarn add $TYPESCRIPT
 env:
-  - TYPESCRIPT=typescript@2.7.1
+  - TYPESCRIPT=typescript@2.8.1
   - TYPESCRIPT=typescript@next
+  - TYPESCRIPT=typescript@2.7.1
   - TYPESCRIPT=typescript@2.6.1
   - TYPESCRIPT=typescript@2.5.2
   - TYPESCRIPT=typescript@2.4.1
diff --git a/appveyor.yml b/appveyor.yml
index 8a18fe467..8a0ec4dfc 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -3,8 +3,9 @@ environment:
   FORCE_COLOR: 1
   nodejs_version: "8"
   matrix:
-  - TYPESCRIPT: typescript@2.7.1
+  - TYPESCRIPT: typescript@2.8.1
   - TYPESCRIPT: typescript@next
+  - TYPESCRIPT: typescript@2.7.1
   - TYPESCRIPT: typescript@2.6.1
   - TYPESCRIPT: typescript@2.5.2
   - TYPESCRIPT: typescript@2.4.1