diff --git a/History.md b/History.md
index b1754f0..4b54422 100644
--- a/History.md
+++ b/History.md
@@ -1,3 +1,8 @@
+## jar-1.7.7 2015-09-16
+
+* updated to Mozilla's Rhino 1.7R7 release from 2015-06-17, notes:
+  https://github.com/mozilla/rhino/releases/tag/Rhino1_7_7_RELEASE
+
 ## jar-1.7.6 2015-04-29
 
 * updated to Mozilla's Rhino 1.7R5 release from 2015-04-15, notes:
diff --git a/jar/rhino-1.7.6.jar b/jar/rhino-1.7.7.jar
similarity index 67%
rename from jar/rhino-1.7.6.jar
rename to jar/rhino-1.7.7.jar
index e824613..7aca283 100644
Binary files a/jar/rhino-1.7.6.jar and b/jar/rhino-1.7.7.jar differ
diff --git a/jar/rhino/jar_path.rb b/jar/rhino/jar_path.rb
index 16f2172..95931d3 100644
--- a/jar/rhino/jar_path.rb
+++ b/jar/rhino/jar_path.rb
@@ -1,5 +1,5 @@
 module Rhino
-  JAR_VERSION = '1.7.6'; version = JAR_VERSION.split('.')
+  JAR_VERSION = '1.7.7'; version = JAR_VERSION.split('.')
   jar_file = "rhino-#{version[0]}.#{version[1]}.#{version[2]}.jar"
   JAR_PATH = File.expand_path("../#{jar_file}", File.dirname(__FILE__))
 end