diff --git a/setup.py b/setup.py
index 26c473d6..0a9ae65e 100644
--- a/setup.py
+++ b/setup.py
@@ -18,7 +18,7 @@ INSTALL_REQUIRES = [
 	"werkzeug>=0.11.1,<0.12",
 	"tornado>=4.4.2,<4.5",
 	"sockjs-tornado>=1.0.2,<1.1",
-	"PyYAML>=3.10,<3.11",
+	"PyYAML>=3.12,<3.13",
 	"Flask-Login>=0.3,<0.4",
 	"Flask-Principal>=0.4,<0.5",
 	"Flask-Babel>=0.11,<0.12",