diff --git a/.gitmodules b/.gitmodules
index e69de29..6c66587 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "external/spdlog"]
+	path = external/spdlog
+	url = https://github.com/gabime/spdlog.git