diff --git a/NEWS b/NEWS
index d88e090a..9e093e6a 100644
--- a/NEWS
+++ b/NEWS
@@ -9,6 +9,7 @@
     You can use "iPhone 4s", "iPhone 5", "iPhone 5s", "iPad 2" ,"iPad Retina",
     "iPad Air", "Resizable iPhone" and "Resizable iPad" for device name.
     (Ex rake device_name="Resizable iPhone")
+  * Improved String interpolation performance. ~10% faster.
 
 = RubyMotion 2.29 =
 
diff --git a/vm b/vm
index f4924074..9ac18b6e 160000
--- a/vm
+++ b/vm
@@ -1 +1 @@
-Subproject commit f49240740e54d4f3343086748e69582f92f42599
+Subproject commit 9ac18b6eca5b0afe479078d7233607cbaf618035