diff --git a/composer.json b/composer.json
index 9003e171..e4a2f1cd 100644
--- a/composer.json
+++ b/composer.json
@@ -82,7 +82,7 @@
             }
         },
         "durable-workflow": {
-            "product-train": "2.2.7",
+            "product-train": "2.3.0-rc.1",
             "supported-server-versions": "2.5.0",
             "worker-protocol-version": "1.19",
             "control-plane-version": "2",
diff --git a/docs/portal/build/workflows-activities.md b/docs/portal/build/workflows-activities.md
index 929fa186..27a8b7b4 100644
--- a/docs/portal/build/workflows-activities.md
+++ b/docs/portal/build/workflows-activities.md
@@ -53,6 +53,9 @@ The sequence, type, and details of context operations are durable. Changing them
 
 ## Call a registered service
 
+This authoring API is introduced in the PHP SDK 2.3 prerelease. Install it with
+`composer require durable-workflow/sdk:^2.3@RC`.
+
 Use `serviceOperation()` inside a workflow to invoke a Server service endpoint.
 The call pauses until Server records its result. Worker restarts replay the same
 call identity and result without submitting another operation.
diff --git a/docs/quickstart-contract.json b/docs/quickstart-contract.json
index b3c0e96a..4188a52b 100644
--- a/docs/quickstart-contract.json
+++ b/docs/quickstart-contract.json
@@ -3,9 +3,9 @@
   "schema_version": 2,
   "package": {
     "name": "durable-workflow/sdk",
-    "published_version": "2.2.7",
-    "composer_requirement": "2.2.7",
-    "onboarding_requirement": "^2.2"
+    "published_version": "2.3.0-rc.1",
+    "composer_requirement": "2.3.0-rc.1",
+    "onboarding_requirement": "^2.3@RC"
   },
   "runtime_targets": {
     "server": {