diff --git a/.gitignore b/.gitignore
index f1d51bec..a14afefc 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
 .idea
 *.iml
-
+external
diff --git a/.gitmodules b/.gitmodules
index 216c807c..b9d0b9a4 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,4 +1,8 @@
 [submodule "external/for"]
 	path = external/for
 	url = git@github.com:cruppstahl/for.git
+	ignore = dirty
+[submodule "external/crow"]
+	path = external/crow
+	url = git@github.com:ipkn/crow.git
 	ignore = dirty
\ No newline at end of file