diff --git a/appveyor.yml b/appveyor.yml
index d0f0759..6842aa5 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -14,11 +14,11 @@ environment:
       TOOLCHAIN: stable
     - TARGET: x86_64-pc-windows-gnu
       MINGW: true
-      TOOLCHAIN: 1.66.0
+      TOOLCHAIN: 1.67.0
     - TARGET: x86_64-pc-windows-msvc
       TOOLCHAIN: stable
     - TARGET: x86_64-pc-windows-msvc
-      TOOLCHAIN: 1.66.0
+      TOOLCHAIN: 1.67.0
 
 install:
   - set PATH=%PATH%;C:\Users\appveyor\.cargo\bin