diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2ab543dc..aa6209b7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Change Log
 
+## [5.51.0](https://github.com/plivo/plivo-java/tree/v5.51.0) (2026-08-19)
+**Feature - Caller Reputation profile-first API**
+- Added optional `enable_caller_reputation`, `caller_reputation_carriers`, `url` and `method` fluent-builder params to `ProfileUpdater`, serialized to the matching wire keys on Profile update
+- `caller_reputation_carriers` accepts the customer-facing carrier keys `"at&t"`, `"t-mobile"` and `"verizon"` (case-insensitive on the API side)
+- Single profile-level callback URL replaces the earlier per-carrier `callbacks` map; Update Number is now attach-only for CR and never registers a new business
+- Backward-compatible additive builder methods
+
 ## [5.50.0](https://github.com/plivo/plivo-java/tree/v5.50.0) (2026-07-28)
 **Feature - Toll-free verification terms, privacy, opt-in and help fields**
 - Added optional `termsAndConditionsLink`, `privacyPolicyLink`, `optinMessage` and `helpMessage` parameters to the toll-free verification create and update methods
diff --git a/src/main/java/com/plivo/api/models/profile/ProfileUpdater.java b/src/main/java/com/plivo/api/models/profile/ProfileUpdater.java
index e0a7a620..1573b404 100644
--- a/src/main/java/com/plivo/api/models/profile/ProfileUpdater.java
+++ b/src/main/java/com/plivo/api/models/profile/ProfileUpdater.java
@@ -18,6 +18,10 @@ public class ProfileUpdater extends MessagingProfileUpdater<Profile> {
     private String altBusinessId;
     private String altBusinessIdType;
     private String doingBusinessAs;
+    private Boolean enableCallerReputation;
+    private java.util.List<String> callerReputationCarriers;
+    private String url;
+    private String method;
 
     public ProfileUpdater(String id) {
         super(id);
@@ -126,6 +130,42 @@ public String getDoingBusinessAs(){
         return doingBusinessAs;
     }
 
+    public ProfileUpdater enable_caller_reputation (Boolean enableCallerReputation) {
+        this.enableCallerReputation = enableCallerReputation;
+        return this;
+    }
+
+    public Boolean getEnableCallerReputation(){
+        return enableCallerReputation;
+    }
+
+    public ProfileUpdater caller_reputation_carriers (java.util.List<String> callerReputationCarriers) {
+        this.callerReputationCarriers = callerReputationCarriers;
+        return this;
+    }
+
+    public java.util.List<String> getCallerReputationCarriers(){
+        return callerReputationCarriers;
+    }
+
+    public ProfileUpdater url (String url) {
+        this.url = url;
+        return this;
+    }
+
+    public String getUrl(){
+        return url;
+    }
+
+    public ProfileUpdater method (String method) {
+        this.method = method;
+        return this;
+    }
+
+    public String getMethod(){
+        return method;
+    }
+
     @Override
     protected Call<Profile> obtainCall() {
       return client().getApiService().profileUpdate(client().getAuthId(), id, this);
diff --git a/src/main/resources/com/plivo/api/version.txt b/src/main/resources/com/plivo/api/version.txt
index 24091d30..885f9fed 100644
--- a/src/main/resources/com/plivo/api/version.txt
+++ b/src/main/resources/com/plivo/api/version.txt
@@ -1 +1 @@
-5.50.0
+5.51.0
diff --git a/src/test/java/com/plivo/api/ProfileTest.java b/src/test/java/com/plivo/api/ProfileTest.java
index 83883561..2ba1e38b 100644
--- a/src/test/java/com/plivo/api/ProfileTest.java
+++ b/src/test/java/com/plivo/api/ProfileTest.java
@@ -67,6 +67,21 @@ public void profileUpdateShouldSucceed() throws Exception {
         assertRequest("POST", "Profile/8abd0935-fd17-4876-9b40-5855488ac5b5/");
     }
 
+    @Test
+    public void profileUpdateWithCallerReputationShouldSucceed() throws Exception {
+        String fixtureName = "profileUpdateResponse.json";
+
+        expectResponse(fixtureName, 202);
+        Profile response = Profile.update("8abd0935-fd17-4876-9b40-5855488ac5b5")
+            .enable_caller_reputation(true)
+            .caller_reputation_carriers(java.util.Arrays.asList("at&t", "t-mobile"))
+            .url("https://example.com/cr/webhook")
+            .method("POST")
+            .update();
+
+        assertRequest("POST", "Profile/8abd0935-fd17-4876-9b40-5855488ac5b5/");
+    }
+
     @Test
     public void profileDeleteShouldSucceed() throws Exception {
         String fixtureName = "profileDeleteResponse.json";