diff --git a/appveyor.yml b/appveyor.yml
index 82c255ce..56b8047e 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -26,3 +26,5 @@ environment:
     - ruby_version: "25-x64"
     - ruby_version: "26"
     - ruby_version: "26-x64"
+    - ruby_version: "27"
+    - ruby_version: "27-x64"