diff --git a/images/win/toolsets/toolset-2016.json b/images/win/toolsets/toolset-2016.json
index c3efc743..63f51586 100644
--- a/images/win/toolsets/toolset-2016.json
+++ b/images/win/toolsets/toolset-2016.json
@@ -72,7 +72,7 @@
                 "1.14.*",
                 "1.15.*"
             ],
-            "default": "1.14.*"
+            "default": "1.15.*"
         },
         {
             "name": "Boost",
diff --git a/images/win/toolsets/toolset-2019.json b/images/win/toolsets/toolset-2019.json
index df7f0533..914f5416 100644
--- a/images/win/toolsets/toolset-2019.json
+++ b/images/win/toolsets/toolset-2019.json
@@ -72,7 +72,7 @@
                 "1.14.*",
                 "1.15.*"
             ],
-            "default": "1.14.*"
+            "default": "1.15.*"
         },
         {
             "name": "Boost",