diff --git a/src/main/java/org/apache/sling/feature/Configuration.java b/src/main/java/org/apache/sling/feature/Configuration.java
index c53c95c..4642952 100644
--- a/src/main/java/org/apache/sling/feature/Configuration.java
+++ b/src/main/java/org/apache/sling/feature/Configuration.java
@@ -16,8 +16,8 @@
  */
 package org.apache.sling.feature;
 
-import java.util.Dictionary;
-import java.util.Hashtable;
+import java.util.LinkedHashMap;
+import java.util.Map;
 
 
 /**
@@ -44,7 +44,7 @@ public class Configuration
     private final String factoryPid;
 
     /** The properties. */
-    private final Dictionary<String, Object> properties = new Hashtable<>();
+    private final Map<String, Object> properties = new LinkedHashMap<>();
 
     /**
      * Create a new configuration
@@ -139,7 +139,7 @@ public boolean isFactoryConfiguration() {
      * Get all properties of the configuration.
      * @return The properties
      */
-    public Dictionary<String, Object> getProperties() {
+    public Map<String, Object> getProperties() {
         return this.properties;
     }
 
diff --git a/src/main/java/org/apache/sling/feature/Feature.java b/src/main/java/org/apache/sling/feature/Feature.java
index a25eac7..4cdcaf1 100644
--- a/src/main/java/org/apache/sling/feature/Feature.java
+++ b/src/main/java/org/apache/sling/feature/Feature.java
@@ -17,7 +17,6 @@
 package org.apache.sling.feature;
 
 import java.util.ArrayList;
-import java.util.Enumeration;
 import java.util.List;
 
 import org.apache.felix.utils.resource.CapabilityImpl;
@@ -25,6 +24,8 @@
 import org.osgi.resource.Capability;
 import org.osgi.resource.Requirement;
 
+import java.util.Iterator;
+
 /**
  * A feature consists of
  * <ul>
@@ -310,9 +311,9 @@ public Feature copy(final ArtifactId id) {
         // configurations
         for(final Configuration cfg : this.getConfigurations()) {
             final Configuration c = cfg.isFactoryConfiguration() ? new Configuration(cfg.getFactoryPid(), cfg.getName()) : new Configuration(cfg.getPid());
-            final Enumeration<String> keyEnum = cfg.getProperties().keys();
-            while ( keyEnum.hasMoreElements() ) {
-                final String key = keyEnum.nextElement();
+            final Iterator<String> keyEnum = cfg.getProperties().keySet().iterator();
+            while ( keyEnum.hasNext() ) {
+                final String key = keyEnum.next();
                 c.getProperties().put(key, cfg.getProperties().get(key));
             }
             result.getConfigurations().add(c);
diff --git a/src/main/java/org/apache/sling/feature/builder/BuilderUtil.java b/src/main/java/org/apache/sling/feature/builder/BuilderUtil.java
index 372966f..ed7d355 100644
--- a/src/main/java/org/apache/sling/feature/builder/BuilderUtil.java
+++ b/src/main/java/org/apache/sling/feature/builder/BuilderUtil.java
@@ -30,6 +30,7 @@
 import java.io.StringReader;
 import java.io.StringWriter;
 import java.util.Enumeration;
+import java.util.Iterator;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Stream;
@@ -148,9 +149,9 @@ static void mergeConfigurations(final Configurations target, final Configuration
                 if ( current.compareTo(cfg) == 0 ) {
                     found = true;
                     // merge / override properties
-                    final Enumeration<String> i = cfg.getProperties().keys();
-                    while ( i.hasMoreElements() ) {
-                        final String key = i.nextElement();
+                    final Iterator<String> i = cfg.getProperties().keySet().iterator();
+                    while ( i.hasNext() ) {
+                        final String key = i.next();
                         current.getProperties().put(key, cfg.getProperties().get(key));
                     }
                     break;
diff --git a/src/main/java/org/apache/sling/feature/builder/FeatureBuilder.java b/src/main/java/org/apache/sling/feature/builder/FeatureBuilder.java
index 19a56a7..059ae29 100644
--- a/src/main/java/org/apache/sling/feature/builder/FeatureBuilder.java
+++ b/src/main/java/org/apache/sling/feature/builder/FeatureBuilder.java
@@ -214,7 +214,7 @@ public static Feature assemble(
      */
     public static void resolveVariables(final Feature feature, final KeyValueMap additionalVariables) {
         for(final Configuration cfg : feature.getConfigurations()) {
-            final Set<String> keys = new HashSet<>(Collections.list(cfg.getProperties().keys()));
+            final Set<String> keys = new HashSet<>(cfg.getProperties().keySet());
             for(final String key : keys) {
                 final Object value = cfg.getProperties().get(key);
                 cfg.getProperties().put(key, replaceVariables(value, additionalVariables, feature));
diff --git a/src/main/java/org/apache/sling/feature/package-info.java b/src/main/java/org/apache/sling/feature/package-info.java
index 3d70902..8201ca5 100644
--- a/src/main/java/org/apache/sling/feature/package-info.java
+++ b/src/main/java/org/apache/sling/feature/package-info.java
@@ -17,7 +17,7 @@
  * under the License.
  */
 
-@org.osgi.annotation.versioning.Version("0.1.0")
+@org.osgi.annotation.versioning.Version("0.2.0")
 package org.apache.sling.feature;