diff --git a/appveyor.yml b/appveyor.yml
index 90a752e..ce1c308 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -7,6 +7,14 @@ configuration:
 
 environment:
   matrix:
+  - VS_VERSION: 9
+    VS_PLATFORM: win32
+  - VS_VERSION: 9
+    VS_PLATFORM: x64
+  - VS_VERSION: 10
+    VS_PLATFORM: win32
+  - VS_VERSION: 10
+    VS_PLATFORM: x64
   - VS_VERSION: 11
     VS_PLATFORM: win32
   - VS_VERSION: 11
@@ -15,9 +23,9 @@ environment:
     VS_PLATFORM: win32
   - VS_VERSION: 12
     VS_PLATFORM: x64
-  - VS_VERSION: 13
+  - VS_VERSION: 14
     VS_PLATFORM: win32
-  - VS_VERSION: 13
+  - VS_VERSION: 14
     VS_PLATFORM: x64
 
 before_build: