Implemented a block set tag.
diff --git a/CHANGES b/CHANGES
index b5aee79..d4f3c3b 100644
--- a/CHANGES
+++ b/CHANGES
@@ -18,6 +18,7 @@
   object that logs failures into a logger.
 - If unmarshalling of cached data fails the template will be
   reloaded now.
+- Implemented a block ``set`` tag.
 
 Version 2.7.3
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