diff --git a/src/main/java/io/wcm/handler/commons/editcontext/DropTargetImpl.java b/src/main/java/io/wcm/handler/commons/editcontext/DropTargetImpl.java
index ddba8a2..417ad77 100644
--- a/src/main/java/io/wcm/handler/commons/editcontext/DropTargetImpl.java
+++ b/src/main/java/io/wcm/handler/commons/editcontext/DropTargetImpl.java
@@ -24,6 +24,7 @@
 
 import org.apache.sling.commons.json.JSONException;
 import org.apache.sling.commons.json.io.JSONWriter;
+import org.jetbrains.annotations.NotNull;
 import org.osgi.annotation.versioning.ProviderType;
 
 import com.day.cq.wcm.api.components.DropTarget;
@@ -52,7 +53,7 @@ public final class DropTargetImpl implements DropTarget {
    * @param name drop target name
    * @param propertyName property name
    */
-  public DropTargetImpl(String name, String propertyName) {
+  public DropTargetImpl(@NotNull String name, @NotNull String propertyName) {
     this.name = name;
     this.id = CSS_CLASS_PREFIX + this.name;
     this.propertyName = propertyName;
@@ -99,7 +100,7 @@ public String[] getGroups() {
    * @param values the DD groups.
    * @return this
    */
-  public DropTargetImpl setGroups(String[] values) {
+  public DropTargetImpl setGroups(String @NotNull [] values) {
     this.groups = values;
     return this;
   }
@@ -117,7 +118,7 @@ public String[] getAccept() {
    * @param values the accept patterns
    * @return this
    */
-  public DropTargetImpl setAccept(String[] values) {
+  public DropTargetImpl setAccept(String @NotNull [] values) {
     this.accept = values;
     return this;
   }
@@ -135,7 +136,7 @@ public Map<String, String> getParameters() {
    * @param value a map of additional parameters.
    * @return this
    */
-  public DropTargetImpl setParameters(Map<String, String> value) {
+  public DropTargetImpl setParameters(@NotNull Map<String, String> value) {
     this.parameters = value;
     return this;
   }
diff --git a/src/main/java/io/wcm/handler/commons/editcontext/package-info.java b/src/main/java/io/wcm/handler/commons/editcontext/package-info.java
index 299ddf7..aca90de 100644
--- a/src/main/java/io/wcm/handler/commons/editcontext/package-info.java
+++ b/src/main/java/io/wcm/handler/commons/editcontext/package-info.java
@@ -20,5 +20,5 @@
 /**
  * Helper classes for AEM edit context.
  */
-@org.osgi.annotation.versioning.Version("1.0.0")
+@org.osgi.annotation.versioning.Version("1.0.1")
 package io.wcm.handler.commons.editcontext;