diff --git a/.gitmodules b/.gitmodules
deleted file mode 100644
index 19faf26..0000000
--- a/.gitmodules
+++ /dev/null
@@ -1,3 +0,0 @@
-[submodule "simple-protobuf"]
-	path = simple-protobuf
-	url = https://github.com/fumiama/simple-protobuf.git
diff --git a/server.c b/server.c
index f224456..fc136a9 100644
--- a/server.c
+++ b/server.c
@@ -13,8 +13,8 @@
 #include <unistd.h>
 #include <pthread.h>
 #include <time.h>
+#include <simple_protobuf.h>
 #include "config.h"
-#include "simple-protobuf/simple_protobuf.h"
 
 #if !__APPLE__
     #include <sys/sendfile.h>