diff --git a/citesphere-model/pom.xml b/citesphere-model/pom.xml
index 36f8721..b03ef0e 100644
--- a/citesphere-model/pom.xml
+++ b/citesphere-model/pom.xml
@@ -2,7 +2,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>edu.asu.diging</groupId>
     <artifactId>citesphere-model</artifactId>
-    <version>1.20</version>
+    <version>1.21-SNAPSHOT</version>
 
     <name>${project.groupId}:${project.artifactId}</name>
     <description>