diff --git a/CHANGELOG.md b/CHANGELOG.md
index 430e2c3..f1a0059 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,12 @@
-### 0.10.0 / Unreleased
+### 0.10.0 / 2019-10-09
 
-* Requires Ruby 2.4 or later.
+Note: This release now requires Ruby 2.4 or later
+
+* Increase metadata timeout to improve reliability in some hosting environments
+* Support an environment variable to suppress Cloud SDK credentials warnings
+* Make the header check case insensitive
+* Set instance variables at initialization to avoid spamming warnings
+* Pass "Metadata-Flavor" header to metadata server when checking for GCE
 
 ### 0.9.0 / 2019-08-05