diff --git a/appveyor.yml b/appveyor.yml
index 2f5defe..0031acd 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -14,8 +14,10 @@ branches:
 
 environment:
   matrix:
+    - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2013
+      TOOLSET: msvc-9.0,msvc-10.0,msvc-11.0
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
-      TOOLSET: msvc-9.0,msvc-10.0,msvc-11.0,msvc-12.0,msvc-14.0
+      TOOLSET: msvc-12.0,msvc-14.0
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
       TOOLSET: msvc-14.1,clang-win
       CXXSTD: 14,17