diff --git a/CHANGELOG.md b/CHANGELOG.md
index 40cc681fc..59a7b2451 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## Unreleased
+## Version 1.51.0 (2025-10-20)
 
 ### AWS X-Ray SDK support and propagator
 
diff --git a/docs/apidiffs/current_vs_latest/opentelemetry-aws-xray.txt b/docs/apidiffs/current_vs_latest/opentelemetry-aws-xray.txt
index 80b1d4110..c27f8c4d5 100644
--- a/docs/apidiffs/current_vs_latest/opentelemetry-aws-xray.txt
+++ b/docs/apidiffs/current_vs_latest/opentelemetry-aws-xray.txt
@@ -1,4 +1,4 @@
-Comparing source compatibility of opentelemetry-aws-xray-1.51.0-SNAPSHOT.jar against opentelemetry-aws-xray-1.50.0.jar
+Comparing source compatibility of opentelemetry-aws-xray-1.51.0.jar against opentelemetry-aws-xray-1.50.0.jar
 +++  NEW CLASS: PUBLIC(+) ABSTRACT(+) io.opentelemetry.contrib.awsxray.AwsXrayAdaptiveSamplingConfig  (not serializable)
 	+++  CLASS FILE FORMAT VERSION: 52.0 <- n.a.
 	+++  NEW SUPERCLASS: java.lang.Object
diff --git a/version.gradle.kts b/version.gradle.kts
index 54918ebc5..3113b252e 100644
--- a/version.gradle.kts
+++ b/version.gradle.kts
@@ -1,5 +1,5 @@
-val stableVersion = "1.51.0-SNAPSHOT"
-val alphaVersion = "1.51.0-alpha-SNAPSHOT"
+val stableVersion = "1.51.0"
+val alphaVersion = "1.51.0-alpha"
 
 allprojects {
   if (findProperty("otel.stable") != "true") {