diff --git a/.gitmodules b/.gitmodules
index 53d7ecd..af8a698 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +1,6 @@
 [submodule "external/google-test"]
 	path = external/google-test
 	url = https://github.com/google/googletest.git
+[submodule "external/coveralls-cmake"]
+	path = external/coveralls-cmake
+	url = https://github.com/JoakimSoderberg/coveralls-cmake.git
diff --git a/external/coveralls-cmake b/external/coveralls-cmake
new file mode 160000
index 0000000..e37d5b8
--- /dev/null
+++ b/external/coveralls-cmake
@@ -0,0 +1 @@
+Subproject commit e37d5b8674dab235185b07ad9208c88d84f81823