diff --git a/CHANGELOG.md b/CHANGELOG.md
index f6b83896..6e39b01e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,11 @@
 
 All notable changes to the LaunchDarkly Android SDK will be documented in this file. This project adheres to [Semantic Versioning](http://semver.org).
 
+## [3.1.5] - 2022-05-05
+
+### Fixed
+- Prevent `NullPointerException` when event buffer is full and `diagnosticOptOut` is true. (Thanks, [mattyway](https://github.com/launchdarkly/android-client-sdk/pull/160)!)
+
 ## [3.1.4] - 2022-03-23
 ### Fixed
 - Removed Android Appcompat dependency.
diff --git a/example/build.gradle b/example/build.gradle
index 0edb48ea..4f2bbc71 100644
--- a/example/build.gradle
+++ b/example/build.gradle
@@ -29,5 +29,5 @@ dependencies {
 
     implementation(project(":launchdarkly-android-client-sdk"))
     // Comment the previous line and uncomment this one to depend on the published artifact:
-    //implementation("com.launchdarkly:launchdarkly-android-client-sdk:3.1.4")
+    //implementation("com.launchdarkly:launchdarkly-android-client-sdk:3.1.5")
 }
diff --git a/gradle.properties b/gradle.properties
index 68ef3f83..98ea8499 100644
--- a/gradle.properties
+++ b/gradle.properties
@@ -16,7 +16,7 @@
 # This option should only be used with decoupled projects. More details, visit
 # http://www.gradle.org/docs/current/userguide/multi_project_builds.html#sec:decoupled_projects
 # org.gradle.parallel=true
-version=3.1.4
+version=3.1.5
 
 sonatypeUsername=
 sonatypePassword=