diff --git a/README.md b/README.md
index 415dadf..f48d423 100644
--- a/README.md
+++ b/README.md
@@ -665,6 +665,17 @@ body = {
 }
 client.update_subscriber_credentials('<insert-subscriber-id>', body)
 ```
+- Upsert subscriber credentials: `upsert_subscriber_credentials(subscriber_id, body)`
+
+```ruby
+body = {
+    'providerId' => '<insert-provider-id>',
+    'credentials' => {
+        # Insert all fields here
+    }
+}
+client.upsert_subscriber_credentials('<insert-subscriber-id>', body)
+```
 
 - Delete subscriber credentials by providerId: `delete_subscriber_credentials(subscriberId, providerId)`
 
diff --git a/lib/novu/api/subscribers.rb b/lib/novu/api/subscribers.rb
index a54f24a..83a5c1b 100644
--- a/lib/novu/api/subscribers.rb
+++ b/lib/novu/api/subscribers.rb
@@ -87,7 +87,8 @@ def delete_subscriber(subscriber_id)
         delete("/subscribers/#{subscriber_id}")
       end
 
-      # Update subscriber credentials from the Novu platform. Subscriber credentials associated to the delivery methods such as slack and push tokens.
+      # Update subscriber credentials from the Novu platform. Subscriber credentials
+      # associated to the delivery methods such as slack and push tokens.
       #
       # @pathparams:
       # @param `subscriber_id` [String] The ID of the subscriber to update credentials.
@@ -103,6 +104,23 @@ def update_subscriber_credentials(subscriber_id, body)
         put("/subscribers/#{subscriber_id}/credentials", body: body)
       end
 
+      # Upsert subscriber credentials from the Novu platform. Subscriber credentials
+      # associated to the delivery methods such as slack and push tokens.
+      #
+      # @pathparams:
+      # @param `subscriber_id` [String] The ID of the subscriber to update credentials.
+      #
+      # @bodyparams:
+      # @param `providerId` [String] The provider identifier for the credentials
+      # @param `credentials` [Hash] Credentials payload for the specified provider
+      #
+      # @return [Hash] Hash of updated subscriber credentials entity
+      # @return [number] status
+      #  - Returns 200 if the subscriber credentials has been updated correctly.
+      def upsert_subscriber_credentials(subscriber_id, body)
+        patch("/subscribers/#{subscriber_id}/credentials", body: body)
+      end
+
       # Delete subscriber credentials by providerId
       # Delete subscriber credentials such as slack and expo tokens.
       #
diff --git a/spec/subscribers_spec.rb b/spec/subscribers_spec.rb
index 1748285..0f4113b 100644
--- a/spec/subscribers_spec.rb
+++ b/spec/subscribers_spec.rb
@@ -159,6 +159,28 @@
     end
   end
 
+  describe "#upsert_subscriber_credentials" do
+    it "upserts the subscriber credentials" do
+      body = {
+        providerId: "slack",
+        credentials: { token: "new-slack-token" }
+      }.to_json
+
+      response_body = {
+        _id: "63f71b3ef067290fa669106d"
+      }.to_json
+
+      stub_request(:patch, "#{base_uri}/subscribers/#{subscriber_id}/credentials")
+        .with(body: body)
+        .to_return(status: 200, body: response_body)
+
+      result = client.upsert_subscriber_credentials(subscriber_id, body)
+
+      expect(result.body).to eq(response_body)
+      expect(result.code).to eq(200)
+    end
+  end
+
   describe "#delete_subscriber_credentials" do
     it "#Delete subscriber credentials such as slack and expo tokens." do
       providerId = 'slack'