diff --git a/pom.xml b/pom.xml
index e3378ec..77d470f 100644
--- a/pom.xml
+++ b/pom.xml
@@ -11,7 +11,7 @@
     <properties>
         <github.url>scm:git:git@github.com:dockstore/swagger-java-sam-client.git</github.url>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <dockstore-core.version>1.21.0-alpha.1</dockstore-core.version>
+        <dockstore-core.version>1.21.0-alpha.6</dockstore-core.version>
         <maven-failsafe.version>2.21.0</maven-failsafe.version>
         <maven-surefire.version>2.21.0</maven-surefire.version>
         <javadocExecutable>${java.home}/bin/javadoc</javadocExecutable>