Index: appveyor.yml
===================================================================
diff -u -N -rd2a206909d8a78ac62e7742d63628fd6c563f8c5 -r7705361024980a3707594af6e7af46a57c2df3d8
--- appveyor.yml	(.../appveyor.yml)	(revision d2a206909d8a78ac62e7742d63628fd6c563f8c5)
+++ appveyor.yml	(.../appveyor.yml)	(revision 7705361024980a3707594af6e7af46a57c2df3d8)
@@ -1,6 +1,6 @@
 platform: x64
 
-image: Visual Studio 2017
+image: Visual Studio 2019
 
 branches:
   only: