diff --git a/appveyor.yml b/appveyor.yml
index 5d0c199..e66af62 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -25,7 +25,7 @@ environment:
       ADDRESS_MODEL: 32,64
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
       TOOLSET: msvc-14.2
-      CXXSTD: 14,17
+      CXXSTD: 14,17,latest
       ADDRESS_MODEL: 32,64
     - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2015
       ADDPATH: C:\cygwin\bin;