diff --git a/.gitmodules b/.gitmodules
index 77f89ea..6806cae 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,9 +1,12 @@
 [submodule "cmake"]
 	path = cmake
 	url = https://github.com/biojppm/cmake
+	branch = master
 [submodule "extern/debugbreak"]
 	path = src/c4/ext/debugbreak
 	url = https://github.com/biojppm/debugbreak
+	branch = master
 [submodule "src/c4/ext/fast_float"]
 	path = src/c4/ext/fast_float
 	url = https://github.com/fastfloat/fast_float
+	branch = main