diff --git a/ChangeLog.md b/ChangeLog.md
index 2412dab..2c6c94c 100644
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -3,9 +3,13 @@ stomp ChangeLog
 
 ## ?.?.? / ????-??-??
 
+## 12.0.0 / 2021-10-24
+
 * Made library compatible with XP 11, `xp-framework/networking` version
   11.0 and PHP 8.1
   (@thekid)
+* Implemented xp-framework/rfc#341, dropping compatibility with XP 9
+  (@thekid)
 
 ## 11.1.0 / 2021-01-13
 
diff --git a/composer.json b/composer.json
index 6ac1bf2..4874ddd 100755
--- a/composer.json
+++ b/composer.json
@@ -6,13 +6,13 @@
   "description" : "STOMP protocol implementation",
   "keywords": ["module", "xp"],
   "require" : {
-    "xp-framework/core": "^11.0 | ^10.0 | ^9.0 | ^8.0 | ^7.0",
-    "xp-framework/logging": "^11.0 | ^10.0 | ^9.0 | ^8.0 | ^7.0",
-    "xp-framework/networking": "^10.0 | ^9.0 | ^8.0 | ^7.0 | ^6.6",
+    "xp-framework/core": "^11.0 | ^10.0",
+    "xp-framework/logging": "^11.0 | ^10.0 | ^9.1",
+    "xp-framework/networking": "^10.0 | ^9.3",
     "php": ">=7.0.0"
   },
   "require-dev" : {
-    "xp-framework/unittest": "^11.0 | ^10.0 | ^9.0 | ^8.0 | ^7.0"
+    "xp-framework/unittest": "^11.0 | ^10.1"
   },
   "autoload" : {
     "files" : ["src/main/php/autoload.php"]
diff --git a/src/test/php/peer/stomp/unittest/BaseTest.class.php b/src/test/php/peer/stomp/unittest/BaseTest.class.php
index 12d0a35..9d31ce7 100755
--- a/src/test/php/peer/stomp/unittest/BaseTest.class.php
+++ b/src/test/php/peer/stomp/unittest/BaseTest.class.php
@@ -33,7 +33,7 @@ public function _connect(URL $url) {
       }
 
       public function _disconnect() {
-        $this->sent= $this->out->getStream()->getBytes();
+        $this->sent= $this->out->stream()->bytes();
         $this->in= null;
         $this->out= null;
       }
@@ -52,7 +52,7 @@ public function readSentBytes() {
           return $sent;
         }
 
-        return $this->out->getStream()->getBytes();
+        return $this->out->stream()->bytes();
       }
 
       public function clearSentBytes() {
diff --git a/src/test/php/peer/stomp/unittest/FrameToWireTest.class.php b/src/test/php/peer/stomp/unittest/FrameToWireTest.class.php
index 5cce3a5..e130297 100755
--- a/src/test/php/peer/stomp/unittest/FrameToWireTest.class.php
+++ b/src/test/php/peer/stomp/unittest/FrameToWireTest.class.php
@@ -16,7 +16,7 @@ class FrameToWireTest extends TestCase {
   private function write($frame) {
     $out= new MemoryOutputStream();
     $frame->write(new StringWriter($out));
-    return $out->getBytes();
+    return $out->bytes();
   }
 
   #[Test]