diff --git a/oidc/src/main/java/de/bstly/we/oidc/businesslogic/model/OidcTokenResponse.java b/oidc/src/main/java/de/bstly/we/oidc/businesslogic/model/OidcTokenResponse.java
index 788ae76..ecbf31f 100644
--- a/oidc/src/main/java/de/bstly/we/oidc/businesslogic/model/OidcTokenResponse.java
+++ b/oidc/src/main/java/de/bstly/we/oidc/businesslogic/model/OidcTokenResponse.java
@@ -3,9 +3,12 @@
  */
 package de.bstly.we.oidc.businesslogic.model;
 
+import com.fasterxml.jackson.annotation.JsonInclude;
+
 /**
  * The Class OidcTokenResponse.
  */
+@JsonInclude(JsonInclude.Include.NON_EMPTY)
 public class OidcTokenResponse {
 
 	private String access_token;
@@ -56,7 +59,7 @@ public class OidcTokenResponse {
 	 * @return the refresh token
 	 */
 	public String getRefresh_token() {
-		return refresh_token != null ? refresh_token : "";
+		return refresh_token;
 	}
 
 	/**
diff --git a/pom.xml b/pom.xml
index da01861..e7a3c36 100755
--- a/pom.xml
+++ b/pom.xml
@@ -14,7 +14,7 @@
 		<java.version>17</java.version>
 		<querydsl.version>5.0.0</querydsl.version>
 		<nimbus.version>9.37.3</nimbus.version>
-		<revision>3.0.8-SNAPSHOT</revision>
+		<revision>3.0.9-SNAPSHOT</revision>
 	</properties>
 
 	<parent>