diff --git a/images/linux/toolsets/toolset-1604.json b/images/linux/toolsets/toolset-1604.json
index f9ef6c681..a01eb64f1 100644
--- a/images/linux/toolsets/toolset-1604.json
+++ b/images/linux/toolsets/toolset-1604.json
@@ -45,7 +45,7 @@
                 "1.14.*",
                 "1.15.*"
             ],
-            "default": "1.14.*"
+            "default": "1.15.*"
         },
         {
             "name": "boost",
diff --git a/images/linux/toolsets/toolset-1804.json b/images/linux/toolsets/toolset-1804.json
index 0b385d491..278a5146f 100644
--- a/images/linux/toolsets/toolset-1804.json
+++ b/images/linux/toolsets/toolset-1804.json
@@ -45,7 +45,7 @@
                 "1.14.*",
                 "1.15.*"
             ],
-            "default": "1.14.*"
+            "default": "1.15.*"
         },
         {
             "name": "boost",
diff --git a/images/linux/toolsets/toolset-2004.json b/images/linux/toolsets/toolset-2004.json
index a3696fcdc..96927d819 100644
--- a/images/linux/toolsets/toolset-2004.json
+++ b/images/linux/toolsets/toolset-2004.json
@@ -44,7 +44,7 @@
                 "1.14.*",
                 "1.15.*"
             ],
-            "default": "1.14.*"
+            "default": "1.15.*"
         },
         {
             "name": "Ruby",