diff --git a/CHANGELOG.md b/CHANGELOG.md
index df4c674d32..be29986714 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,11 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
 
+### Fixed
+
+- Soundness issue in the `MaybeUninit` implementation
+- Warning for deprecated `mem::uninitialized`
+
 ## [v0.4.3] - 2019-04-21
 
 ### Changed
diff --git a/README.md b/README.md
index b8cbd00f7d..bf2ba83b9e 100644
--- a/README.md
+++ b/README.md
@@ -41,7 +41,7 @@ A concurrency framework for building real time systems.
 
 ## Requirements
 
-- Rust 1.31.0+
+- Rust 1.36.0+
 
 - Applications must be written using the 2018 edition.
 
diff --git a/book/ru/src/README_RU.md b/book/ru/src/README_RU.md
index 921837a928..cb5124e23a 100644
--- a/book/ru/src/README_RU.md
+++ b/book/ru/src/README_RU.md
@@ -39,7 +39,7 @@
 
 ## Требования
 
-- Rust 1.31.0+
+- Rust 1.36.0+
 
 - Программы нужно писать используя 2018 edition.