diff --git a/README.md b/README.md
index b302287..442ff6a 100644
--- a/README.md
+++ b/README.md
@@ -43,8 +43,8 @@ applications.
 The latest version of Getdown can be obtained thusly:
 
   * Download the pre-built jar file from Maven Central:
-    [getdown-1.6.2.jar](http://repo2.maven.org/maven2/com/threerings/getdown/1.6.2/getdown-1.6.2.jar)
-  * Obtain the jar artifact via Maven with the following identifier: `com.threerings:getdown:1.6.2`.
+    [getdown-1.6.4.jar](http://repo2.maven.org/maven2/com/threerings/getdown/1.6.4/getdown-1.6.4.jar)
+  * Obtain the jar artifact via Maven with the following identifier: `com.threerings:getdown:1.6.4`.
   * [Check out the code](https://github.com/threerings/getdown) and build it yourself.
 
 You can also:
@@ -52,6 +52,12 @@ You can also:
   * View the [javadoc documentation] online.
   * Browse the [source code] online.
 
+## JVM Version Requirements
+
+  * Getdown version 1.7.x (not yet released) requires Java 7 VM or newer.
+  * Getdown version 1.6.x requires Java 6 VM or newer.
+  * Getdown version 1.5 and earlier requires Java 5 VM or newer.
+
 ## Building
 
 Getdown is built with Maven in the standard ways. Invoke the following commands, for fun and