--- a/.gitmodules
+++ b/.gitmodules
@@ -4,9 +4,6 @@
 [submodule "couchdb/settee"]
 	path = couchdb/settee
 	url = https://github.com/inadarei/settee.git
-[submodule "lib/springy"]
-	path = lib/springy
-	url = https://github.com/dhotson/springy.git
 [submodule "lib/php-diff"]
 	path = lib/php-diff
 	url = https://github.com/chrisboulton/php-diff.git
@@ -19,4 +16,7 @@
 [submodule "lib/phpquery"]
 	path = lib/phpquery
 	url = https://github.com/TobiaszCudnik/phpquery.git
+[submodule "javascripts/sigma"]
+	path = javascripts/sigma
+	url = https://github.com/jacomyal/sigma.js.git