diff --git a/upstream.toml b/upstream.toml
index 0051793..4879c93 100644
--- a/upstream.toml
+++ b/upstream.toml
@@ -1,5 +1,5 @@
 [releases]
-core = "1.6.3"
+core = "1.6.4"
 dom = "1.6.7"
 utils = "0.2.4"
 vue = "1.0.7"