diff --git a/.gitmodules b/.gitmodules
index 7d081116..f866564b 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -4,3 +4,6 @@
 [submodule "breathe"]
 	path = breathe
 	url = git://github.com/cppformat/breathe.git
+[submodule "format-benchmark"]
+	path = format-benchmark
+	url = git@github.com:cppformat/format-benchmark.git
diff --git a/format-benchmark b/format-benchmark
new file mode 160000
index 00000000..fccf6476
--- /dev/null
+++ b/format-benchmark
@@ -0,0 +1 @@
+Subproject commit fccf647628009bb84fe8e8a9aa651d68120a6294