diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 2071a9ed..ac0a5dc5 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -762,7 +762,7 @@ jobs:
           -B build
           -DCMAKE_BUILD_TYPE="${{env.cmake_buildtype}}"
           -DCMAKE_PREFIX_PATH="${{env.prefix_path}}/lib/cmake"
-          -DBUILD_WERROR=OFF
+          -DBUILD_WERROR=ON
           -DUSE_BUNDLE=ON
           -DENABLE_DBUS=OFF
           -DICU_ROOT="${{env.prefix_path}}"
@@ -902,7 +902,7 @@ jobs:
           -B build
           -DCMAKE_BUILD_TYPE="${{env.cmake_buildtype}}"
           -DCMAKE_PREFIX_PATH="${{env.prefix_path}}/lib/cmake"
-          -DBUILD_WERROR=OFF
+          -DBUILD_WERROR=ON
           -DUSE_BUNDLE=ON
           -DENABLE_DBUS=OFF
           -DICU_ROOT="${{env.prefix_path}}"
@@ -1000,7 +1000,7 @@ jobs:
           -DCMAKE_TOOLCHAIN_FILE="../cmake/Toolchain-${{matrix.arch}}-w64-mingw32-shared.cmake"
           -DCMAKE_BUILD_TYPE="${{env.cmake_buildtype}}"
           -DCMAKE_PREFIX_PATH="/strawberry-mxe/usr/${{matrix.arch}}-w64-mingw32.shared/qt6"
-          -DBUILD_WERROR=OFF
+          -DBUILD_WERROR=ON
           -DARCH="${{matrix.arch}}"
           -DENABLE_WIN32_CONSOLE=$(test "${{matrix.buildtype}}" = "debug" && echo "ON" || echo "OFF")
           -DENABLE_DBUS=OFF
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 12c2a958..d20245c5 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -74,7 +74,7 @@ else()
     $<$<COMPILE_LANGUAGE:CXX>:-Woverloaded-virtual>
     $<$<COMPILE_LANGUAGE:CXX>:-Wold-style-cast>
   )
-  option(BUILD_WERROR "Build with -Werror" OFF)
+  option(BUILD_WERROR "Build with -Werror" ON)
   if(BUILD_WERROR)
     list(APPEND COMPILE_OPTIONS -Werror)
   endif()