diff --git a/.github/workflows/scripts/build-linux-amd64-ssl1.sh b/.github/workflows/scripts/build-linux-amd64-ssl1.sh
index 312aa00..49d375c 100755
--- a/.github/workflows/scripts/build-linux-amd64-ssl1.sh
+++ b/.github/workflows/scripts/build-linux-amd64-ssl1.sh
@@ -41,7 +41,7 @@ cd ../../../
 export CMAKE_C_FLAGS="${CMAKE_C_FLAGS}"
 export CMAKE_CXX_FLAGS="${CMAKE_CXX_FLAGS} -fno-omit-frame-pointer -ffunction-sections -fdata-sections -fno-exceptions -fno-rtti"
 export CMAKE_SHARED_LINKER_FLAGS="${CMAKE_SHARED_LINKER_FLAGS} -Wl,--gc-sections -Wl,--exclude-libs,ALL"
-export CMAKE_CXX_FLAGS_MINSIZEREL="${CMAKE_CXX_FLAGS_MINSIZEREL} -flto=thin -Oz"
+export CMAKE_CXX_FLAGS_MINSIZEREL="${CMAKE_CXX_FLAGS_MINSIZEREL} -flto=thin -O3"
 
 # Build tdlib
 cd implementations/tdlight/build
diff --git a/.github/workflows/scripts/build-linux-amd64-ssl3.sh b/.github/workflows/scripts/build-linux-amd64-ssl3.sh
index 35365cd..7559f61 100755
--- a/.github/workflows/scripts/build-linux-amd64-ssl3.sh
+++ b/.github/workflows/scripts/build-linux-amd64-ssl3.sh
@@ -41,7 +41,7 @@ cd ../../../
 export CMAKE_C_FLAGS="${CMAKE_C_FLAGS}"
 export CMAKE_CXX_FLAGS="${CMAKE_CXX_FLAGS} -fno-omit-frame-pointer -ffunction-sections -fdata-sections -fno-exceptions -fno-rtti"
 export CMAKE_SHARED_LINKER_FLAGS="${CMAKE_SHARED_LINKER_FLAGS} -Wl,--gc-sections -Wl,--exclude-libs,ALL"
-export CMAKE_CXX_FLAGS_MINSIZEREL="${CMAKE_CXX_FLAGS_MINSIZEREL} -flto=thin -Oz"
+export CMAKE_CXX_FLAGS_MINSIZEREL="${CMAKE_CXX_FLAGS_MINSIZEREL} -flto=thin -O3"
 
 # Build tdlib
 cd implementations/tdlight/build
diff --git a/.github/workflows/scripts/build-linux-arm64-ssl1.sh b/.github/workflows/scripts/build-linux-arm64-ssl1.sh
index 1ab1ebd..bb60681 100755
--- a/.github/workflows/scripts/build-linux-arm64-ssl1.sh
+++ b/.github/workflows/scripts/build-linux-arm64-ssl1.sh
@@ -41,7 +41,7 @@ cd ../../../
 export CMAKE_C_FLAGS="${CMAKE_C_FLAGS}"
 export CMAKE_CXX_FLAGS="${CMAKE_CXX_FLAGS} -fno-omit-frame-pointer -ffunction-sections -fdata-sections -fno-exceptions -fno-rtti"
 export CMAKE_SHARED_LINKER_FLAGS="${CMAKE_SHARED_LINKER_FLAGS} -Wl,--gc-sections -Wl,--exclude-libs,ALL"
-export CMAKE_CXX_FLAGS_MINSIZEREL="${CMAKE_CXX_FLAGS_MINSIZEREL} -flto=thin -Oz"
+export CMAKE_CXX_FLAGS_MINSIZEREL="${CMAKE_CXX_FLAGS_MINSIZEREL} -flto=thin -O3"
 
 # Build tdlib
 cd implementations/tdlight/build