diff --git a/.gitmodules b/.gitmodules
index 3d2557b..38b7159 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,3 @@
 [submodule "binding/ip2region4php"]
 	path = binding/ip2region4php
 	url = https://git.oschina.net/monsterkiller/ip2region.git
-[submodule "binding/php_ext"]
-	path = binding/php_ext
-	url = git@github.com:dongyado/ip2region.git
diff --git a/binding/php_ext b/binding/php_ext
deleted file mode 160000
index d46d396..0000000
--- a/binding/php_ext
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit d46d396a3c927a1cd259bd64038c58d42b1d678b