diff --git a/.gitmodules b/.gitmodules
index 236e7c2fed205d3021fd1dad8c197b8b783a1fab..881fa0b71f50287d31c758e2f4789ad101bc8e09 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -26,6 +26,7 @@
 [submodule "ext/spdlog"]
 	path = ext/spdlog
 	url = https://github.com/gabime/spdlog.git
+	branch = v1.x
 [submodule "ext/stb"]
 	path = ext/stb
 	url = https://github.com/nothings/stb.git