diff --git a/README.md b/README.md
index 2b6d439..f570d74 100644
--- a/README.md
+++ b/README.md
@@ -9,12 +9,10 @@ This plugin provide accordion to subtask list of issue.
 
 ## Compatibility
 
-Redmine 3.x stable
+Redmine 3.3 stable
 
 Tested on:
 * 3.3.2
-* 3.1.2
-* 3.0.4
 
 ## Installation