diff --git a/README.md b/README.md
index 6d5c8c7..42a4eb7 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ The published artifacts are hosted on Maven Central, so no additional repository
 <dependency>
     <groupId>de.extio</groupId>
     <artifactId>lm-lib</artifactId>
-    <version>2.9.0</version>
+    <version>2.9.1</version>
 </dependency>
 ```
 
diff --git a/pom.xml b/pom.xml
index b5abb7d..b18e1ef 100755
--- a/pom.xml
+++ b/pom.xml
@@ -6,7 +6,7 @@
 	<name>lm-lib</name>
 	<description>Modular Java library for LLM-powered applications, model clients, and agentic orchestration.</description>
 	<url>https://github.com/extio-de/lm-lib</url>
-	<version>2.9.0</version>
+	<version>2.9.1</version>
 
 	<licenses>
 		<license>
diff --git a/src/main/java/de/extio/lmlib/client/oai/completion/chat/ChatMessage.java b/src/main/java/de/extio/lmlib/client/oai/completion/chat/ChatMessage.java
index efb0f94..4e5ded3 100644
--- a/src/main/java/de/extio/lmlib/client/oai/completion/chat/ChatMessage.java
+++ b/src/main/java/de/extio/lmlib/client/oai/completion/chat/ChatMessage.java
@@ -49,7 +49,8 @@ final class ChatMessage {
 		return reasoningContent;
 	}
 	
-	@JsonProperty("reasoning")
+	@JsonProperty("reasoning_content")
+	@JsonAlias("reasoning")
 	public void setReasoningContent(final String reasoningContent) {
 		this.reasoningContent = reasoningContent;
 	}