diff --git a/build-helpers b/build-helpers
index fa82de1..ed6468e 160000
--- a/build-helpers
+++ b/build-helpers
@@ -1 +1 @@
-Subproject commit fa82de18241ef5c4cf4fc8328137f726b572827e
+Subproject commit ed6468e2c31b2ce3c9d69a06adefef278e507971
diff --git a/libraries/build.sh b/libraries/build.sh
index 0393add..5607a63 100755
--- a/libraries/build.sh
+++ b/libraries/build.sh
@@ -67,7 +67,7 @@ exec_script_external build_ed25519.sh ed25519
 exec_script_external build_jsoncpp.sh jsoncpp
 #exec_script build_mysqlconnector.sh
 exec_script_external build_opus.sh opus
-exec_script_external build_protobuf.sh protobuf
+exec_script build_protobuf.sh protobuf
 exec_script_external build_spdlog.sh spdlog
 exec_script_external build_stringvariable.sh StringVariable
 exec_script_external build_threadpool.sh Thread-Pool
diff --git a/libraries/build_protobuf.sh b/libraries/build_protobuf.sh
index d36ca27..7ebbe9e 100755
--- a/libraries/build_protobuf.sh
+++ b/libraries/build_protobuf.sh
@@ -1,7 +1,23 @@
-cd protobuf
+[[ -z "${build_helper_file}" ]] && {
+	echo "Missing build helper file. Please define \"build_helper_file\""
+	exit 1
+}
+source ${build_helper_file}
+[[ $build_helpers_defined -ne 1 ]] && {
+    echo "Failed to include build helpers."
+    exit 1
+}
+
+requires_rebuild ${library_path}
+[[ $? -eq 0 ]] && exit 0
+
+
+cd protobuf || exit 1
 # git checkout 3.5.1.1
-cd build
-cmake ../cmake/ -Dprotobuf_BUILD_TESTS=OFF -DCMAKE_CXX_FLAGS="-std=c++11 -fPIC ${CXX_FLAGS}" -DCMAKE_C_FLAGS="${C_FLAGS}" -DCMAKE_BUILD_TYPE=RelWithDebInfo ${CMAKE_OPTIONS}
-make ${CMAKE_MAKE_OPTIONS}
-sudo make install
-#sudo ldconfig 
+cd build || exit 1
+cmake ../cmake/ -Dprotobuf_BUILD_TESTS=OFF -DCMAKE_CXX_FLAGS="-std=c++11 -fPIC ${CXX_FLAGS}" -DCMAKE_C_FLAGS="${C_FLAGS}" -DCMAKE_BUILD_TYPE=RelWithDebInfo ${CMAKE_OPTIONS} || exit 1
+make ${CMAKE_MAKE_OPTIONS} || exit 1
+sudo make install || exit 1
+#sudo ldconfig
+
+set_build_successful ${library_path}