Index: ps/trunk/build/premake/premake5.lua
===================================================================
--- ps/trunk/build/premake/premake5.lua
+++ ps/trunk/build/premake/premake5.lua
@@ -394,8 +394,6 @@
 	language "C++"
 	kind(target_type)
 
-	filter "action:vs2015"
-		toolset "v140_xp"
 	filter "action:vs2017"
 		toolset "v141_xp"
 	filter {}
@@ -893,7 +891,7 @@
 	end
 
 	-- runtime-library-specific
-	if _ACTION == "vs2015" or _ACTION == "vs2017" then
+	if _ACTION == "vs2017" then
 		table.insert(source_dirs, "lib/sysdep/rtl/msc");
 	else
 		table.insert(source_dirs, "lib/sysdep/rtl/gcc");
Index: ps/trunk/build/workspaces/update-workspaces.bat
===================================================================
--- ps/trunk/build/workspaces/update-workspaces.bat
+++ ps/trunk/build/workspaces/update-workspaces.bat
@@ -2,6 +2,5 @@
 rem ** Create Visual Studio Workspaces on Windows **
 
 cd ..\premake
-if not exist ..\workspaces\vc2015\SKIP_PREMAKE_HERE premake5\bin\release\premake5 --outpath="../workspaces/vc2015" --use-shared-glooxwrapper %* vs2015
-if not exist ..\workspaces\vc2017\SKIP_PREMAKE_HERE premake5\bin\release\premake5 --outpath="../workspaces/vs2017" --use-shared-glooxwrapper %* vs2017
+if not exist ..\workspaces\vs2017\SKIP_PREMAKE_HERE premake5\bin\release\premake5 --outpath="../workspaces/vs2017" --use-shared-glooxwrapper %* vs2017
 cd ..\workspaces
Index: ps/trunk/source/lib/precompiled.h
===================================================================
--- ps/trunk/source/lib/precompiled.h
+++ ps/trunk/source/lib/precompiled.h
@@ -41,8 +41,8 @@
 
 // must come before any STL headers are included
 #if MSC_VERSION
-# if MSC_VERSION < 1900
-#   error "Visual Studio 2015 is the minimal supported version"
+# if MSC_VERSION < 1910
+#   error "Visual Studio 2017 is the minimal supported version"
 # endif
 # ifdef NDEBUG	// release: disable all checks
 #  define _HAS_ITERATOR_DEBUGGING 0