diff --git a/CHANGES b/CHANGES
index 5263f12..2f2968e 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,6 +1,9 @@
 Revision history for SPIRV-Tools
 
-v2019.5-dev 2019-10-21
+v2020.1-dev 2019-12-11
+ - Start v2020.1-dev
+
+v2019.5 2019-12-11
  - General:
    - Export SPIRV-Tools targets on installation
    - SPIRV-Tools support for SPIR-V 1.5 (#2865)
@@ -12,6 +15,12 @@
    - Improved CMake install step. (#2963)
    - Add fuzzer for spirv-dis call path (#2977)
    - Ensure timestamp does not vary with timezone. (#2982)
+   - Add a vscode extension for SPIR-V disassembly files (#2987)
+   - Add iOS as a supported platform (#3001)
+   - utils/vscode: Add SPIR-V language server support
+   - Respect CMAKE_INSTALL_LIBDIR in installed CMake files (#3054)
+   - Permit the debug instructions in WebGPU SPIR-V (#3063)
+   - Add support for Fuchsia. (#3062)
  - Optimizer
    - Add descriptor array scalar replacement (#2742)
    - Add pass to wrap OpKill in a function call (#2790)
@@ -24,6 +33,10 @@
    - Better handling of OpKill in continues (#2842,#2922,#2933)
    - Enable OpTypeCooperativeMatrix specialization (#2927)
    - Support constant-folding UConvert and SConvert (#2960)
+   - Update Offset to ConstOffset bitmask if operand is constant. (#3024)
+   - Improve RegisterSizePasses (#3059)
+   - Folding: perform add and sub on mismatched integer types (#3084)
+   - Graphics robust access: use signed clamp (#3073)
    Fixes:
    - Instrument: Fix version 2 output record write for tess eval shaders. (#2782)
    - Instrument: Add support for Buffer Device Address extension (#2792)
@@ -37,10 +50,12 @@
    - Adding valilidation checks for OpEntryPoint duplicate names and execution mode (#2862)
    - Relaxed bitcast with pointers (#2878)
    - Validate physical storage buffer restrictions (#2930)
-   - Add SPV_KHR_shader_clock validation (#2879)
+   - Add SPV_KHR_shader_clock validation (#2879, #3013)
    - Validate that selections are structured (#2962)
    - Disallow use of OpCompositeExtract/OpCompositeInsert with no indices (#2980)
    - Check that derivatives operate on 32-bit values (#2983)
+   - Validate array stride does not cause overlap (#3028)
+   - Validate nested constructs (#3068)
    Fixes:
    - Fix validation of constant matrices (#2794)
    - Update "remquor" validation
@@ -63,6 +78,12 @@
    - Add fuzzer pass to change loop controls (#2949)
    - Add fuzzer pass to change function controls (#2951)
    - Add fuzzer pass to add NoContraction decorations (#2950)
+   - Add missing functionality for matrix composites (#2974)
+   - Fuzzer pass to adjust memory access operands (#2968)
+   - Transformation to extract from a composite object (#2991)
+   - Vector shuffle transformation (#3015)
+   - Improve debugging facilities (#3074)
+   - Function outlining fuzzer pass (#3078)
 
 
 v2019.4 2019-08-08