Update version number of rand_core to 0.3.1
diff --git a/rand_core/CHANGELOG.md b/rand_core/CHANGELOG.md
index 2cbb259..e375536 100644
--- a/rand_core/CHANGELOG.md
+++ b/rand_core/CHANGELOG.md
@@ -4,6 +4,9 @@
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [0.3.1] - 2019-01-25
+- Compatibility shim around version 0.4
+
 ## [0.3.0] - 2018-09-24
 - Add `SeedableRng::seed_from_u64` for convenient seeding. (#537)
 
diff --git a/rand_core/Cargo.toml b/rand_core/Cargo.toml
index 7a0e414..f80ee17 100644
--- a/rand_core/Cargo.toml
+++ b/rand_core/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "rand_core"
-version = "0.3.0"
+version = "0.3.1"
 authors = ["The Rand Project Developers", "The Rust Project Developers"]
 license = "MIT/Apache-2.0"
 readme = "README.md"