diff --git a/package.json b/package.json
index 5e3ca675f..e23497b3e 100644
--- a/package.json
+++ b/package.json
@@ -50,7 +50,7 @@
     "temp": "0.5.0",
     "text-buffer": "0.12.0",
     "underscore-plus": "0.6.1",
-    "theorist": "~0.7.0",
+    "theorist": "~0.9.0",
     "delegato": "~0.4.0",
     "mixto": "~0.4.0"
   },