diff --git a/tools/gn/visual_studio_writer.cc b/tools/gn/visual_studio_writer.cc
index 856d548..a8fe041 100644
--- a/tools/gn/visual_studio_writer.cc
+++ b/tools/gn/visual_studio_writer.cc
@@ -79,7 +79,7 @@
 const char kVersionStringVs2015[] = "Visual Studio 2015";  // Visual Studio 2015
 const char kVersionStringVs2017[] = "Visual Studio 2017";  // Visual Studio 2017
 const char kWindowsKitsVersion[] = "10";                   // Windows 10 SDK
-const char kWindowsKitsDefaultVersion[] = "10.0.17134.0";  // Windows 10 SDK
+const char kWindowsKitsDefaultVersion[] = "10.0.15063.0";  // Windows 10 SDK
 
 const char kGuidTypeProject[] = "{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}";
 const char kGuidTypeFolder[] = "{2150E333-8FDC-42A3-9474-1A3956D46DE8}";
diff --git a/tools/gn/visual_studio_writer_unittest.cc b/tools/gn/visual_studio_writer_unittest.cc
index bd9ab96..b924182 100644
--- a/tools/gn/visual_studio_writer_unittest.cc
+++ b/tools/gn/visual_studio_writer_unittest.cc
@@ -31,7 +31,7 @@
 TEST_F(VisualStudioWriterTest, ResolveSolutionFolders) {
   VisualStudioWriter writer(setup_.build_settings(), "Win32",
                             VisualStudioWriter::Version::Vs2015,
-                            "10.0.17134.0");
+                            "10.0.15063.0");
 
   std::string path =
       MakeTestPath("/foo/chromium/src/out/Debug/obj/base/base.vcxproj");
@@ -90,7 +90,7 @@
 TEST_F(VisualStudioWriterTest, ResolveSolutionFolders_AbsPath) {
   VisualStudioWriter writer(setup_.build_settings(), "Win32",
                             VisualStudioWriter::Version::Vs2015,
-                            "10.0.17134.0");
+                            "10.0.15063.0");
 
   std::string path =
       MakeTestPath("/foo/chromium/src/out/Debug/obj/base/base.vcxproj");