diff --git a/pom.xml b/pom.xml
index 1ce0bd9..1023a49 100644
--- a/pom.xml
+++ b/pom.xml
@@ -12,7 +12,7 @@
 
     <groupId>edu.stanford.protege</groupId>
     <artifactId>webprotege-backend-api</artifactId>
-    <version>2.0.0-SNAPSHOT</version>
+    <version>2.0.0</version>
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
@@ -30,7 +30,7 @@
         <maven.build.timestamp.format>yyyyMMdd</maven.build.timestamp.format>
         <commonmark.version>0.11.0</commonmark.version>
         <lucene.version>8.5.2</lucene.version>
-        <java.version>21</java.version>
+        <java.version>17</java.version>
         <spring-cloud.version>2020.0.3</spring-cloud.version>
     </properties>
 
diff --git a/src/main/java/edu/stanford/protege/webprotege/hierarchy/HierarchyDescriptor.java b/src/main/java/edu/stanford/protege/webprotege/hierarchy/HierarchyDescriptor.java
index f3e5490..0d6f826 100644
--- a/src/main/java/edu/stanford/protege/webprotege/hierarchy/HierarchyDescriptor.java
+++ b/src/main/java/edu/stanford/protege/webprotege/hierarchy/HierarchyDescriptor.java
@@ -10,7 +10,7 @@
         @JsonSubTypes.Type(DataPropertyHierarchyDescriptor.class),
         @JsonSubTypes.Type(AnnotationPropertyHierarchyDescriptor.class)
 })
-public sealed interface HierarchyDescriptor permits ClassHierarchyDescriptor, ObjectPropertyHierarchyDescriptor, DataPropertyHierarchyDescriptor, AnnotationPropertyHierarchyDescriptor {
+public interface HierarchyDescriptor {
 
 
 }