diff --git a/Telegram/build/prepare/prepare.py b/Telegram/build/prepare/prepare.py
index 8098a4f9f4..98929c364f 100644
--- a/Telegram/build/prepare/prepare.py
+++ b/Telegram/build/prepare/prepare.py
@@ -558,8 +558,7 @@ win:
     cmake . ^
         -A %WIN32X64% ^
         -DCMAKE_MSVC_RUNTIME_LIBRARY="MultiThreaded$<$<CONFIG:Debug>:Debug>" ^
-        -DCMAKE_C_FLAGS_DEBUG="/MTd /Zi /Ob0 /Od /RTC1" ^
-        -DCMAKE_C_FLAGS_RELEASE="/MT /O2 /Ob2 /DNDEBUG" ^
+        -DCMAKE_POLICY_DEFAULT_CMP0091=NEW ^
         -DCMAKE_C_FLAGS="/DZLIB_WINAPI" ^
         -DZLIB_BUILD_EXAMPLES=OFF
     cmake --build . --config Debug --parallel
@@ -666,9 +665,7 @@ win:
     cmake -B out . ^
         -A %WIN32X64% ^
         -DCMAKE_INSTALL_PREFIX=%LIBS_DIR%/local ^
-        -DCMAKE_MSVC_RUNTIME_LIBRARY="MultiThreaded$<$<CONFIG:Debug>:Debug>" ^
-        -DCMAKE_C_FLAGS_DEBUG="/MTd /Zi /Ob0 /Od /RTC1" ^
-        -DCMAKE_C_FLAGS_RELEASE="/MT /O2 /Ob2 /DNDEBUG"
+        -DOPUS_STATIC_RUNTIME=ON
     cmake --build out --config Debug --parallel
     cmake --build out --config Release --parallel
     cmake --install out --config Release
@@ -878,8 +875,7 @@ win:
         -A %WIN32X64% ^
         -DCMAKE_INSTALL_PREFIX=%LIBS_DIR%/local ^
         -DCMAKE_MSVC_RUNTIME_LIBRARY="MultiThreaded$<$<CONFIG:Debug>:Debug>" ^
-        -DCMAKE_C_FLAGS_DEBUG="/MTd /Zi /Ob0 /Od /RTC1" ^
-        -DCMAKE_C_FLAGS_RELEASE="/MT /O2 /Ob2 /DNDEBUG" ^
+        -DCMAKE_POLICY_DEFAULT_CMP0091=NEW ^
         -DBUILD_SHARED_LIBS=OFF ^
         -DAVIF_ENABLE_WERROR=OFF ^
         -DAVIF_CODEC_DAV1D=ON
@@ -910,12 +906,9 @@ win:
         -A %WIN32X64% ^
         -DCMAKE_INSTALL_PREFIX=%LIBS_DIR%/local ^
         -DCMAKE_MSVC_RUNTIME_LIBRARY="MultiThreaded$<$<CONFIG:Debug>:Debug>" ^
+        -DCMAKE_POLICY_DEFAULT_CMP0091=NEW ^
         -DCMAKE_C_FLAGS="/DLIBDE265_STATIC_BUILD" ^
         -DCMAKE_CXX_FLAGS="/DLIBDE265_STATIC_BUILD" ^
-        -DCMAKE_C_FLAGS_DEBUG="/MTd /Zi /Ob0 /Od /RTC1" ^
-        -DCMAKE_CXX_FLAGS_DEBUG="/MTd /Zi /Ob0 /Od /RTC1" ^
-        -DCMAKE_C_FLAGS_RELEASE="/MT /O2 /Ob2 /DNDEBUG" ^
-        -DCMAKE_CXX_FLAGS_RELEASE="/MT /O2 /Ob2 /DNDEBUG" ^
         -DENABLE_SDL=OFF ^
         -DBUILD_SHARED_LIBS=OFF ^
         -DENABLE_DECODER=OFF ^
@@ -989,10 +982,6 @@ win:
         -A %WIN32X64% ^
         -DCMAKE_INSTALL_PREFIX=%LIBS_DIR%/local ^
         -DCMAKE_MSVC_RUNTIME_LIBRARY="MultiThreaded$<$<CONFIG:Debug>:Debug>" ^
-        -DCMAKE_C_FLAGS_DEBUG="/MTd /Zi /Ob0 /Od /RTC1" ^
-        -DCMAKE_CXX_FLAGS_DEBUG="/MTd /Zi /Ob0 /Od /RTC1" ^
-        -DCMAKE_C_FLAGS_RELEASE="/MT /O2 /Ob2 /DNDEBUG" ^
-        -DCMAKE_CXX_FLAGS_RELEASE="/MT /O2 /Ob2 /DNDEBUG" ^
         -DBUILD_SHARED_LIBS=OFF ^
         -DBUILD_TESTING=OFF ^
         -DENABLE_PLUGIN_LOADING=OFF ^
@@ -1061,10 +1050,6 @@ win:
         -DCMAKE_MSVC_RUNTIME_LIBRARY="MultiThreaded$<$<CONFIG:Debug>:Debug>" ^
         -DCMAKE_C_FLAGS="/DJXL_STATIC_DEFINE /DJXL_THREADS_STATIC_DEFINE /DJXL_CMS_STATIC_DEFINE" ^
         -DCMAKE_CXX_FLAGS="/DJXL_STATIC_DEFINE /DJXL_THREADS_STATIC_DEFINE /DJXL_CMS_STATIC_DEFINE" ^
-        -DCMAKE_C_FLAGS_DEBUG="/MTd /Zi /Ob0 /Od /RTC1" ^
-        -DCMAKE_CXX_FLAGS_DEBUG="/MTd /Zi /Ob0 /Od /RTC1" ^
-        -DCMAKE_C_FLAGS_RELEASE="/MT /O2 /Ob2 /DNDEBUG" ^
-        -DCMAKE_CXX_FLAGS_RELEASE="/MT /O2 /Ob2 /DNDEBUG" ^
         %cmake_defines%
     cmake --build . --config Debug --parallel
     cmake --install . --config Debug
@@ -1873,9 +1858,7 @@ win:
         -D ADA_TESTING=OFF ^
         -D ADA_TOOLS=OFF ^
         -D ADA_INCLUDE_URL_PATTERN=OFF ^
-        -D CMAKE_MSVC_RUNTIME_LIBRARY="MultiThreaded$<$<CONFIG:Debug>:Debug>" ^
-        -D CMAKE_C_FLAGS_DEBUG="/MTd /Zi /Ob0 /Od /RTC1" ^
-        -D CMAKE_C_FLAGS_RELEASE="/MT /O2 /Ob2 /DNDEBUG"
+        -D CMAKE_MSVC_RUNTIME_LIBRARY="MultiThreaded$<$<CONFIG:Debug>:Debug>"
     cmake --build out --config Debug --parallel
     cmake --build out --config Release --parallel
 mac:
@@ -1946,8 +1929,10 @@ win:
         -DZLIB_FOUND=1 ^
         -DZLIB_INCLUDE_DIR=%ZLIB_LIBS_DIR% ^
         -DZLIB_LIBRARIES="%ZLIB_LIBS_DIR%\\Debug\\zlibstaticd.lib" ^
-        -DCMAKE_CXX_FLAGS_DEBUG="/DZLIB_WINAPI /DNDEBUG /MTd /Zi /Od /Ob0" ^
-        -DCMAKE_C_FLAGS_DEBUG="/DNDEBUG /MTd /Zi /Od /Ob0" ^
+        -DCMAKE_MSVC_RUNTIME_LIBRARY="MultiThreaded$<$<CONFIG:Debug>:Debug>" ^
+        -DCMAKE_POLICY_DEFAULT_CMP0091=NEW ^
+        -DCMAKE_C_FLAGS="/DZLIB_WINAPI" ^
+        -DCMAKE_CXX_FLAGS="/DZLIB_WINAPI" ^
         -DCMAKE_EXE_LINKER_FLAGS="/SAFESEH:NO Ws2_32.lib Gdi32.lib Advapi32.lib Crypt32.lib User32.lib %OPENSSL_LIBS_DIR%.dbg\\libssl.lib" ^
         -DCMAKE_SHARED_LINKER_FLAGS="/SAFESEH:NO Ws2_32.lib Gdi32.lib Advapi32.lib Crypt32.lib User32.lib %OPENSSL_LIBS_DIR%.dbg\\libssl.lib" ^
         -DTD_ENABLE_MULTI_PROCESSOR_COMPILATION=ON ^
@@ -1965,8 +1950,10 @@ release:
         -DZLIB_FOUND=1 ^
         -DZLIB_INCLUDE_DIR=%ZLIB_LIBS_DIR% ^
         -DZLIB_LIBRARIES="%ZLIB_LIBS_DIR%\\Release\\zlibstatic.lib" ^
-        -DCMAKE_CXX_FLAGS_RELEASE="/DZLIB_WINAPI /MT /Ob2" ^
-        -DCMAKE_C_FLAGS_RELEASE="/MT /Ob2" ^
+        -DCMAKE_MSVC_RUNTIME_LIBRARY="MultiThreaded$<$<CONFIG:Debug>:Debug>" ^
+        -DCMAKE_POLICY_DEFAULT_CMP0091=NEW ^
+        -DCMAKE_C_FLAGS="/DZLIB_WINAPI" ^
+        -DCMAKE_CXX_FLAGS="/DZLIB_WINAPI" ^
         -DCMAKE_EXE_LINKER_FLAGS="/SAFESEH:NO Ws2_32.lib Gdi32.lib Advapi32.lib Crypt32.lib User32.lib %OPENSSL_LIBS_DIR%\\libssl.lib" ^
         -DCMAKE_SHARED_LINKER_FLAGS="/SAFESEH:NO Ws2_32.lib Gdi32.lib Advapi32.lib Crypt32.lib User32.lib %OPENSSL_LIBS_DIR%\\libssl.lib" ^
         -DTD_ENABLE_MULTI_PROCESSOR_COMPILATION=ON ^