diff --git a/CHANGES b/CHANGES
index 8e28f66da..a7b689913 100644
--- a/CHANGES
+++ b/CHANGES
@@ -9,10 +9,18 @@ v2018.5-dev 2018-07-08
      - Disable Travis-CI bots
      - Disable AppVeyor VisualStudio Release builds. Keep VS 2017 Debug build
    - #1688: Use binary mode on stdin; fixes "spirv-dis <foo.spv" on Windows
+ - Optimizer
+   - Fold a vector shuffle feeding a vector shuffle
+   - Refactor how IRContext is handled by passes
+   - #1721: Fix size bug when folding vector shuffles
+   - #1722: Fix size infinite loop when folding vector shuffles
+   - #1724: Fix finding a constant of a specific type
  - Validator
    - Use libspirv::Instruction where possible
+   - Add option to skip all block layout checks
    - #1685: Vulkan permits non-monotonic offsets for block members
    - #1697: Enforce block layout rules even when using relaxed block layout option
+   - #1719: Fix line number for vector shuffle valiation error
 
 v2018.4 2018-07-08
  - General: