diff --git a/.gitmodules b/.gitmodules
index e69de29..0cc5863 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "external/xxhash"]
+	path = external/xxhash
+	url = https://github.com/Cyan4973/xxHash.git
diff --git a/src/external/xxhash b/external/xxhash
similarity index 100%
rename from src/external/xxhash
rename to external/xxhash