diff --git a/bower.json b/bower.json
index 5a1b3a2..4d66cfc 100644
--- a/bower.json
+++ b/bower.json
@@ -24,6 +24,7 @@
 		".gitignore"
 	],
 	"dependencies": {
-		"angular": "1.2.2"
+		"angular": "1.2.2",
+		"signature_pad": ">= 1.2.4"
 	}
-}
\ No newline at end of file
+}