diff --git a/Makefile b/Makefile
index ccf7a4b..b187fdf 100644
--- a/Makefile
+++ b/Makefile
@@ -10,4 +10,9 @@ abtests:
 	echo
 
 apidocs:
-	apigen -s src/ -s vendor/ --title Ratchet -d reports/api
+	apigen --title Ratchet -d reports/api -s src/ \
+		-s vendor/react \
+		-s vendor/guzzle/guzzle/src/Guzzle/Http \
+		-s vendor/guzzle/guzzle/src/Guzzle/Common \
+		-s vendor/symfony/http-foundation/Symfony/Component/HttpFoundation/Session \
+		-s vendor/evenement/evenement/src/Evenement