diff --git a/.gitmodules b/.gitmodules
index db60706c9..1ebbd57cd 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -31,3 +31,6 @@
 [submodule "cpr"]
     path = externals/cpr
     url = https://github.com/whoshuu/cpr.git
+[submodule "lz4"]
+    path = externals/lz4
+    url = http://github.com/lz4/lz4.git