diff --git a/binding/c/Makefile b/binding/c/Makefile
index ea9523b..3031f3b 100644
--- a/binding/c/Makefile
+++ b/binding/c/Makefile
@@ -1,10 +1,10 @@
 all: xdb_searcher util_test
 
 xdb_searcher: xdb_searcher.h xdb_searcher.c main.c
-	gcc -g -O2 -I./ xdb_searcher.c main.c -o xdb_searcher
+	gcc -O2 -I./ xdb_searcher.c main.c -o xdb_searcher
 
 util_test: xdb_searcher.h xdb_searcher.c util_test.c
-	gcc -g -O2 -I./ xdb_searcher.c util_test.c -o util_test
+	gcc -O2 -I./ xdb_searcher.c util_test.c -o util_test
 
 xdb_searcher.o: xdb_searcher.c
 	gcc -c -o xdb_searcher.o xdb_searcher.c
@@ -21,4 +21,4 @@ clean:
 	find ./ -name xdb_searcher | xargs rm -f
 	rm -rf build
 
-.PHONY: all clean xdb_searcher util_test
\ No newline at end of file
+.PHONY: all clean xdb_searcher util_test
diff --git a/data/ip2region.xdb b/data/ip2region.xdb
index c78b792..7052c05 100644
Binary files a/data/ip2region.xdb and b/data/ip2region.xdb differ