diff --git a/HISTORY.rst b/HISTORY.rst
index 651451d4..37b2acd1 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -14,6 +14,8 @@ PlatformIO 3.0
   - CLion: Improved project portability using "${CMAKE_CURRENT_LIST_DIR}" instead of full path
 
 * Fixed an issue with incorrect detecting of compatibility (LDF) between generic library and Arduino or ARM mbed frameworks
+* Fixed "Runtime Error: Dictionary size changed during iteration"
+  (`issue #2003 <https://github.com/platformio/platformio-core/issues/2003>`_)
 
 3.6.3 (2018-12-12)
 ~~~~~~~~~~~~~~~~~~