diff --git a/core/pom.xml b/core/pom.xml
index ad5fd11..45ed308 100644
--- a/core/pom.xml
+++ b/core/pom.xml
@@ -16,7 +16,7 @@
         <dependency>
             <groupId>org.agrona</groupId>
             <artifactId>agrona</artifactId>
-            <version>1.7.1</version>
+            <version>1.12.0</version>
         </dependency>
         <dependency>
             <groupId>io.netty</groupId>
diff --git a/core/src/main/java/pl/tkowalcz/tjahzi/LabelSerializer.java b/core/src/main/java/pl/tkowalcz/tjahzi/LabelSerializer.java
index 7090d60..98e4bd0 100644
--- a/core/src/main/java/pl/tkowalcz/tjahzi/LabelSerializer.java
+++ b/core/src/main/java/pl/tkowalcz/tjahzi/LabelSerializer.java
@@ -40,7 +40,7 @@ public class LabelSerializer {
     }
 
     public LabelSerializer appendPartialLabelValue(CharSequence value) {
-        cursor += buffer.putStringWithoutLengthAscii(cursor, value.toString());
+        cursor += buffer.putStringWithoutLengthAscii(cursor, value);
 
         return this;
     }