diff --git a/.travis.yml b/.travis.yml
index 69b1fe0..3b1f876 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,8 +3,10 @@ rvm:
   - 1.8.7
   - 1.9.2
   - 1.9.3
-  - jruby-18mode # JRuby in 1.8 mode
-  - jruby-19mode # JRuby in 1.9 mode
+# JRuby fails with
+# java.security.NoSuchAlgorithmException: sha256 MessageDigest not available
+#  - jruby-18mode # JRuby in 1.8 mode
+#  - jruby-19mode # JRuby in 1.9 mode
   - rbx-18mode
   - rbx-19mode
 
diff --git a/README.md b/README.md
index e442d61..3c4430e 100644
--- a/README.md
+++ b/README.md
@@ -45,6 +45,21 @@ Server example (sinatra)
       # Do whatever you need to do
     end
 
+Pre-requisites
+------------
+Tested against these Ruby versions
+  * 1.8.7
+  * 1.9.2
+  * 1.9.3
+  * rbx-18mode
+  * rbx-19mode
+
+However JRuby currently fails with
+java.security.NoSuchAlgorithmException: sha256 MessageDigest not available
+  * jruby-18mode # JRuby in 1.8 mode
+  * jruby-19mode # JRuby in 1.9 mode
+
+
 Developing
 ----------