diff --git a/appveyor.yml b/appveyor.yml
index 9d52449d3a..a8c771c599 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -3,7 +3,7 @@ shallow_clone: true
 platform:
   - x64
 environment:
-  ruby_version: "23-%Platform%"
+  ruby_version: "24-%Platform%"
   zlib_version: "1.2.11"
   matrix:
     - vs: "120"