diff --git a/upstream.toml b/upstream.toml
index 73022e4..fd664a7 100644
--- a/upstream.toml
+++ b/upstream.toml
@@ -1,5 +1,5 @@
 [releases]
-core = "1.6.5"
+core = "1.6.6"
 dom = "1.6.8"
 utils = "0.2.6"
 vue = "1.1.2"