diff --git a/.github/workflows/linux.yml b/.github/workflows/linux.yml
index 6831982259..228ef623c6 100644
--- a/.github/workflows/linux.yml
+++ b/.github/workflows/linux.yml
@@ -108,11 +108,10 @@ jobs:
           $IMAGE_TAG \
           /usr/src/tdesktop/Telegram/build/docker/centos_env/build.sh \
           -D CMAKE_CONFIGURATION_TYPES=Debug \
-          -D CMAKE_C_FLAGS_DEBUG="" \
-          -D CMAKE_CXX_FLAGS_DEBUG="" \
-          -D CMAKE_C_FLAGS="-Werror" \
-          -D CMAKE_CXX_FLAGS="-Werror" \
+          -D CMAKE_C_FLAGS_DEBUG="-O0 -U_FORTIFY_SOURCE" \
+          -D CMAKE_CXX_FLAGS_DEBUG="-O0 -U_FORTIFY_SOURCE" \
           -D CMAKE_EXE_LINKER_FLAGS="-s" \
+          -D CMAKE_COMPILE_WARNING_AS_ERROR=ON \
           -D TDESKTOP_API_TEST=ON \
           -D DESKTOP_APP_DISABLE_AUTOUPDATE=OFF \
           -D DESKTOP_APP_DISABLE_CRASH_REPORTS=OFF \
diff --git a/.github/workflows/mac.yml b/.github/workflows/mac.yml
index cf7d5064ef..395d430ca5 100644
--- a/.github/workflows/mac.yml
+++ b/.github/workflows/mac.yml
@@ -115,8 +115,7 @@ jobs:
 
           ./configure.sh \
           -D CMAKE_CONFIGURATION_TYPES=Debug \
-          -D CMAKE_C_FLAGS="-Werror" \
-          -D CMAKE_CXX_FLAGS="-Werror" \
+          -D CMAKE_COMPILE_WARNING_AS_ERROR=ON \
           -D CMAKE_XCODE_ATTRIBUTE_CODE_SIGNING_ALLOWED=NO \
           -D TDESKTOP_API_TEST=ON \
           -D DESKTOP_APP_DISABLE_AUTOUPDATE=OFF \
diff --git a/.github/workflows/win.yml b/.github/workflows/win.yml
index 7a2f434eed..9f62064933 100644
--- a/.github/workflows/win.yml
+++ b/.github/workflows/win.yml
@@ -178,8 +178,7 @@ jobs:
           %TDESKTOP_BUILD_ARCH% ^
           %TDESKTOP_BUILD_API% ^
           -D CMAKE_CONFIGURATION_TYPES=Debug ^
-          -D CMAKE_C_FLAGS="/WX" ^
-          -D CMAKE_CXX_FLAGS="/WX" ^
+          -D CMAKE_COMPILE_WARNING_AS_ERROR=ON ^
           -D DESKTOP_APP_DISABLE_AUTOUPDATE=OFF ^
           -D DESKTOP_APP_DISABLE_CRASH_REPORTS=OFF ^
           -D DESKTOP_APP_NO_PDB=ON ^