diff --git a/CHANGELOG-0.x.md b/CHANGELOG-0.x.md
index 0baa0d8..b4da140 100644
--- a/CHANGELOG-0.x.md
+++ b/CHANGELOG-0.x.md
@@ -2,6 +2,10 @@
 This changelog references the relevant changes done in 0.x versions.
 
 
+## v0.3.1
+* Add service definition for `gdbots_ncr.node_etag_enricher` to ensure node's always get a new etag on create/update.
+
+
 ## v0.3.0
 __BREAKING CHANGES__
 
diff --git a/composer.json b/composer.json
index e375629..aa1a0cf 100755
--- a/composer.json
+++ b/composer.json
@@ -11,7 +11,7 @@
   },
   "require-dev": {
     "phpunit/phpunit": "^6.4",
-    "aws/aws-sdk-php-symfony": "^1.0",
+    "aws/aws-sdk-php-symfony": "^2.0",
     "ruflin/elastica": "^5.3"
   },
   "autoload": {
diff --git a/src/Resources/config/services.xml b/src/Resources/config/services.xml
index 6706dc6..ad43ca3 100644
--- a/src/Resources/config/services.xml
+++ b/src/Resources/config/services.xml
@@ -17,6 +17,12 @@
       <tag name="pbjx.binder"/>
     </service>
 
+    <!-- enrichers -->
+    <service id="gdbots_ncr.node_etag_enricher" class="Gdbots\Ncr\Enricher\NodeEtagEnricher">
+      <tag name="pbjx.event_subscriber"/>
+      <tag name="pbjx.enricher"/>
+    </service>
+
     <!-- request handlers -->
     <service id="gdbots_ncr.get_node_batch_request_handler" class="Gdbots\Ncr\GetNodeBatchRequestHandler">
       <argument type="service" id="ncr"/>