diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c607f85..2fe04ae 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -20,7 +20,7 @@ jobs:
 
     strategy:
       matrix:
-        arch: ['linux-x86', 'linux-amd64', 'linux-x86-gcc', 'linux-aarch64', 'darwin-x86', 'windows-x86', 'windows-amd64', 'windows-x86-gcc']
+        arch: ['linux-x86', 'linux-amd64', 'linux-x86-gcc', 'linux-aarch64', 'darwin-x86', 'windows-x86-clang', 'windows-amd64', 'windows-x86-gcc']
       fail-fast: false
     
     steps:
@@ -58,7 +58,11 @@ jobs:
     env:
       name: windows-x86-msvc
 
-    name: bot-build (windows-x86-msvc)
+    strategy:
+      matrix:
+        arch: ['windows-x86', 'windows-x86-msvc-xp']
+      fail-fast: false
+
     runs-on: windows-latest
 
     steps:
@@ -75,18 +79,24 @@ jobs:
         run: |
           python -m pip install --upgrade meson ninja
       - name: Configure meson
+        shell: pwsh
         run: |
-          meson setup ${{env.name}}
+            if ('${{matrix.arch}}' -eq 'windows-x86-msvc-xp') {
+              meson setup ${{matrix.arch}} -Dwinxp=true
+            }
+            else {
+              meson setup ${{matrix.arch}}
+            }
       - name: Build sources
         run: |
-          meson compile -C ${{env.name}}
+          meson compile -C ${{matrix.arch}}
       - name: Upload artifacts
         uses: actions/upload-artifact@v3
         with:
-          name: ${{env.name}}
+          name: ${{matrix.arch}}
           path: |
-            ${{env.name}}/yapb.dll
-            ${{env.name}}/yapb.pdb
+            ${{matrix.arch}}/yapb.dll
+            ${{matrix.arch}}/yapb.pdb
 
   bot-release:
     if: |
diff --git a/ext/crlib b/ext/crlib
index 99c8383..71bcf0e 160000
--- a/ext/crlib
+++ b/ext/crlib
@@ -1 +1 @@
-Subproject commit 99c8383ae2fccd6b0263bef92a154e571a0de12d
+Subproject commit 71bcf0e921611f591b2a2f9c68368f2dd158279e
diff --git a/meson.build b/meson.build
index b10861a..7bf37de 100644
--- a/meson.build
+++ b/meson.build
@@ -40,6 +40,7 @@ build_type = get_option ('buildtype')
 
 opt_64bit = get_option('64bit')
 opt_native = get_option('native')
+opt_winxp = get_option('winxp')
 
 # cpp and ldflags from scratch
 cxxflags = []
@@ -201,19 +202,24 @@ if cxx == 'clang' or cxx == 'gcc'
       ]
    endif
 elif os == 'windows' and (cxx =='msvc' or cxx == 'clang-cl')
+
+   # define for building on winxp on msvc
+   if opt_winxp
+      cxxflags += [
+         '/TP', '/DCR_HAS_WINXP_SUPPORT', '/D_WIN32_WINNT=0x0501', '/D_USING_V110_SDK71_'
+      ]
+      ldflags += ['/SUBSYSTEM:WINDOWS,5.01']
+   endif
+
    if not opt_64bit and cxx == 'clang'
       cxxflags += '/MACHINE:X86'
       ldflags += '/MACHINE:X86'
    endif
 
-   cxxflags += [
-      '/TP', '/D _WIN32_WINNT=0x0501', '/D _USING_V110_SDK71_', '/Zc:threadSafeInit-'
-   ]
-
    # minor optimizations for release build
    if build_type == 'release'
       cxxflags += [
-         '/GS-', '/Ob2', '/Oy', '/Oi', '/Ot', '/fp:precise', '/GF', '/GS-', '/GF', '/arch:SSE2', '/Zi'
+         '/Zc:threadSafeInit-', '/GS-', '/Ob2', '/Oy', '/Oi', '/Ot', '/fp:precise', '/GF', '/Gw', '/arch:SSE2', '/Zi', '/guard:ehcont-', '/guard:cf-'
       ]
 
       # add wpo if msvc
@@ -225,7 +231,7 @@ elif os == 'windows' and (cxx =='msvc' or cxx == 'clang-cl')
 
       # add linker flags
       ldflags += [
-         '/LTCG', 'delayimp.lib', '/DELAYLOAD:user32.dll', '/DELAYLOAD:ws2_32.dll', '/SUBSYSTEM:WINDOWS,5.01',
+         '/OPT:REF,ICF', '/GUARD:NO ', '/LTCG', 'delayimp.lib', '/DELAYLOAD:user32.dll', '/DELAYLOAD:ws2_32.dll',
       ]
    endif
    
diff --git a/meson_options.txt b/meson_options.txt
index eaa20a1..83ef85f 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -9,4 +9,7 @@ option('64bit', type : 'boolean', value : false,
        description: 'Enables bot build with as 64-bit binary.')
 	   
 option('native', type : 'boolean', value : false,
-       description: 'Configure compiler for a native machine build.')
\ No newline at end of file
+       description: 'Configure compiler for a native machine build.')
+	   
+option('winxp', type : 'boolean', value : false,
+       description: 'Configure MSVC build to output Windows XP compatible binary.')
diff --git a/package.py b/package.py
index 68b4b81..2cf08da 100644
--- a/package.py
+++ b/package.py
@@ -137,8 +137,9 @@ class BotRelease(object):
                                           'linux-amd64': 'so', 
                                           'linux-x86-gcc': 'so', 
                                           'windows-x86-gcc': 'dll', 
+                                          'windows-x86-clang': 'dll',
+                                          'windows-x86-msvc-xp': 'dll',
                                           'windows-amd64': 'dll', 
-                                          'windows-x86-msvc': 'dll',
                                           'darwin-x86': 'dylib',
                                           }, extra=True))