diff --git a/appveyor.yml b/appveyor.yml
index 36154b2..2eeb238 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -3,7 +3,7 @@ environment:
     PROJECT_NAME: rustfmt
   matrix:
     - TARGET: x86_64-pc-windows-gnu
-      RUST_VERSION: 1.20.0
+      RUST_VERSION: 1.22.1
 
 install:
 #  - ps: Start-FileDownload "https://static.rust-lang.org/dist/channel-rust-stable"