diff --git a/java-sdk/commercial-paper/pom.xml b/java-sdk/commercial-paper/pom.xml
index e703066..78429dc 100644
--- a/java-sdk/commercial-paper/pom.xml
+++ b/java-sdk/commercial-paper/pom.xml
@@ -13,7 +13,7 @@
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
         <java.version>1.8</java.version>
         <swagger.version>2.6.1</swagger.version>
-        <logback.version>1.2.3</logback.version>
+        <logback.version>1.2.9</logback.version>
     </properties>
 
     <dependencyManagement>