diff --git a/abstract-factory/pom.xml b/abstract-factory/pom.xml
index 798093c01..ddb7e7b9d 100644
--- a/abstract-factory/pom.xml
+++ b/abstract-factory/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>abstract-factory</artifactId>
   <dependencies>
diff --git a/adapter/pom.xml b/adapter/pom.xml
index 8def28655..74a58de92 100644
--- a/adapter/pom.xml
+++ b/adapter/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>adapter</artifactId>
   <dependencies>
diff --git a/async-method-invocation/pom.xml b/async-method-invocation/pom.xml
index 699258d93..2a5010b74 100644
--- a/async-method-invocation/pom.xml
+++ b/async-method-invocation/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>async-method-invocation</artifactId>
   <dependencies>
diff --git a/bridge/pom.xml b/bridge/pom.xml
index 01bd26061..947fa2c60 100644
--- a/bridge/pom.xml
+++ b/bridge/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>bridge</artifactId>
   <dependencies>
diff --git a/builder/pom.xml b/builder/pom.xml
index c5405d0c6..65997c9e6 100644
--- a/builder/pom.xml
+++ b/builder/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>builder</artifactId>
   <dependencies>
diff --git a/business-delegate/pom.xml b/business-delegate/pom.xml
index 2a7e77e3c..482d59fab 100644
--- a/business-delegate/pom.xml
+++ b/business-delegate/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>com.iluwatar</groupId>
 		<artifactId>java-design-patterns</artifactId>
-		<version>1.5.0</version>
+		<version>1.6.0</version>
 	</parent>
 	<artifactId>business-delegate</artifactId>
 	<dependencies>
diff --git a/callback/pom.xml b/callback/pom.xml
index d54b76172..f8cf6babf 100644
--- a/callback/pom.xml
+++ b/callback/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>callback</artifactId>
   <dependencies>
diff --git a/chain/pom.xml b/chain/pom.xml
index f4a712260..ebae620d6 100644
--- a/chain/pom.xml
+++ b/chain/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>chain</artifactId>
   <dependencies>
diff --git a/command/pom.xml b/command/pom.xml
index 10bc00f0c..401acba32 100644
--- a/command/pom.xml
+++ b/command/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>command</artifactId>
   <dependencies>
diff --git a/composite/pom.xml b/composite/pom.xml
index 4c910e451..ca4daaaad 100644
--- a/composite/pom.xml
+++ b/composite/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>composite</artifactId>
   <dependencies>
diff --git a/dao/pom.xml b/dao/pom.xml
index 6653741e4..a7a5c74ca 100644
--- a/dao/pom.xml
+++ b/dao/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>dao</artifactId>
   <dependencies>
diff --git a/decorator/pom.xml b/decorator/pom.xml
index 1b93a171c..57946b711 100644
--- a/decorator/pom.xml
+++ b/decorator/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>decorator</artifactId>
   <dependencies>
diff --git a/dependency-injection/pom.xml b/dependency-injection/pom.xml
index 70300b617..a6780cb20 100644
--- a/dependency-injection/pom.xml
+++ b/dependency-injection/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>dependency-injection</artifactId>
   <dependencies>
diff --git a/double-checked-locking/pom.xml b/double-checked-locking/pom.xml
index 21eb281c6..46d4a70f0 100644
--- a/double-checked-locking/pom.xml
+++ b/double-checked-locking/pom.xml
@@ -3,7 +3,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>double-checked-locking</artifactId>
   <dependencies>
diff --git a/double-dispatch/pom.xml b/double-dispatch/pom.xml
index 0d7462486..5f16635f6 100644
--- a/double-dispatch/pom.xml
+++ b/double-dispatch/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>double-dispatch</artifactId>
   <dependencies>
diff --git a/event-aggregator/pom.xml b/event-aggregator/pom.xml
index 90f488729..1c9a3b626 100644
--- a/event-aggregator/pom.xml
+++ b/event-aggregator/pom.xml
@@ -4,7 +4,7 @@
 	<parent>
 		<groupId>com.iluwatar</groupId>
 		<artifactId>java-design-patterns</artifactId>
-		<version>1.5.0</version>
+		<version>1.6.0</version>
 	</parent>
 	<artifactId>event-aggregator</artifactId>
 	<dependencies>
diff --git a/execute-around/pom.xml b/execute-around/pom.xml
index d8d41f5d8..7d806337b 100644
--- a/execute-around/pom.xml
+++ b/execute-around/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>execute-around</artifactId>
   <dependencies>
diff --git a/facade/pom.xml b/facade/pom.xml
index 53ac6fd67..17d3d707c 100644
--- a/facade/pom.xml
+++ b/facade/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>facade</artifactId>
   <dependencies>
diff --git a/factory-method/pom.xml b/factory-method/pom.xml
index 1812b006d..81072a4f9 100644
--- a/factory-method/pom.xml
+++ b/factory-method/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>factory-method</artifactId>
   <dependencies>
diff --git a/flux/pom.xml b/flux/pom.xml
index 367598fa2..3efccbfa4 100644
--- a/flux/pom.xml
+++ b/flux/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>flux</artifactId>
   <dependencies>
diff --git a/flyweight/pom.xml b/flyweight/pom.xml
index 87903217c..54ca5bef2 100644
--- a/flyweight/pom.xml
+++ b/flyweight/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>flyweight</artifactId>
   <dependencies>
diff --git a/front-controller/pom.xml b/front-controller/pom.xml
index d0fcc001f..a554186f3 100644
--- a/front-controller/pom.xml
+++ b/front-controller/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>com.iluwatar</groupId>
 		<artifactId>java-design-patterns</artifactId>
-		<version>1.5.0</version>
+		<version>1.6.0</version>
 	</parent>
 	<artifactId>front-controller</artifactId>
 	<dependencies>
diff --git a/half-sync-half-async/pom.xml b/half-sync-half-async/pom.xml
index edbc2e420..94c12d797 100644
--- a/half-sync-half-async/pom.xml
+++ b/half-sync-half-async/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>half-sync-half-async</artifactId>
   <dependencies>
diff --git a/intercepting-filter/pom.xml b/intercepting-filter/pom.xml
index b4b5db5ae..35ebd9f59 100644
--- a/intercepting-filter/pom.xml
+++ b/intercepting-filter/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>intercepting-filter</artifactId>
   <dependencies>
diff --git a/interpreter/pom.xml b/interpreter/pom.xml
index f2778e0cd..8583464d3 100644
--- a/interpreter/pom.xml
+++ b/interpreter/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>interpreter</artifactId>
   <dependencies>
diff --git a/iterator/pom.xml b/iterator/pom.xml
index b77939c9d..da5040dce 100644
--- a/iterator/pom.xml
+++ b/iterator/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>iterator</artifactId>
   <dependencies>
diff --git a/layers/pom.xml b/layers/pom.xml
index dd036e74c..de672a3df 100644
--- a/layers/pom.xml
+++ b/layers/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>com.iluwatar</groupId>
 		<artifactId>java-design-patterns</artifactId>
-		<version>1.5.0</version>
+		<version>1.6.0</version>
 	</parent>
 	<groupId>com.iluwatar.layers</groupId>
 	<artifactId>layers</artifactId>
diff --git a/lazy-loading/pom.xml b/lazy-loading/pom.xml
index cbbafae14..b795abf87 100644
--- a/lazy-loading/pom.xml
+++ b/lazy-loading/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>lazy-loading</artifactId>
   <dependencies>
diff --git a/mediator/pom.xml b/mediator/pom.xml
index 2f3f83ff5..5a9c00042 100644
--- a/mediator/pom.xml
+++ b/mediator/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>mediator</artifactId>
   <dependencies>
diff --git a/memento/pom.xml b/memento/pom.xml
index ccc2bd1e2..182a46204 100644
--- a/memento/pom.xml
+++ b/memento/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>memento</artifactId>
   <dependencies>
diff --git a/model-view-controller/pom.xml b/model-view-controller/pom.xml
index 3a9167f5e..7162c71d9 100644
--- a/model-view-controller/pom.xml
+++ b/model-view-controller/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>model-view-controller</artifactId>
   <dependencies>
diff --git a/model-view-presenter/pom.xml b/model-view-presenter/pom.xml
index 5277e57ab..41a2d2013 100644
--- a/model-view-presenter/pom.xml
+++ b/model-view-presenter/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>model-view-presenter</artifactId>
   <name>model-view-presenter</name>
diff --git a/multiton/pom.xml b/multiton/pom.xml
index 8f1220119..6ea1ad2fa 100644
--- a/multiton/pom.xml
+++ b/multiton/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>multiton</artifactId>
   <dependencies>
diff --git a/naked-objects/dom/pom.xml b/naked-objects/dom/pom.xml
index 620efa9d7..cadf6d82e 100644
--- a/naked-objects/dom/pom.xml
+++ b/naked-objects/dom/pom.xml
@@ -16,7 +16,7 @@
 	<parent>
 		<groupId>com.iluwatar</groupId>
 		<artifactId>naked-objects</artifactId>
-		<version>1.5.0</version>
+		<version>1.6.0</version>
 	</parent>
 
 	<artifactId>naked-objects-dom</artifactId>
diff --git a/naked-objects/fixture/pom.xml b/naked-objects/fixture/pom.xml
index b0146e84e..33cd798f7 100644
--- a/naked-objects/fixture/pom.xml
+++ b/naked-objects/fixture/pom.xml
@@ -16,7 +16,7 @@
 	<parent>
 		<groupId>com.iluwatar</groupId>
 		<artifactId>naked-objects</artifactId>
-		<version>1.5.0</version>
+		<version>1.6.0</version>
 	</parent>
 
 	<artifactId>naked-objects-fixture</artifactId>
diff --git a/naked-objects/integtests/pom.xml b/naked-objects/integtests/pom.xml
index f479896cc..1fd518bb1 100644
--- a/naked-objects/integtests/pom.xml
+++ b/naked-objects/integtests/pom.xml
@@ -16,7 +16,7 @@
 	<parent>
 		<groupId>com.iluwatar</groupId>
 		<artifactId>naked-objects</artifactId>
-		<version>1.5.0</version>
+		<version>1.6.0</version>
 	</parent>
 
 	<artifactId>naked-objects-integtests</artifactId>
diff --git a/naked-objects/pom.xml b/naked-objects/pom.xml
index 8860815af..8cac48a09 100644
--- a/naked-objects/pom.xml
+++ b/naked-objects/pom.xml
@@ -15,7 +15,7 @@
 	<parent>
 		<artifactId>java-design-patterns</artifactId>
 		<groupId>com.iluwatar</groupId>
-		<version>1.5.0</version>
+		<version>1.6.0</version>
 	</parent>
 
 	<artifactId>naked-objects</artifactId>
@@ -350,17 +350,17 @@
 			<dependency>
 				<groupId>${project.groupId}</groupId>
 				<artifactId>naked-objects-dom</artifactId>
-				<version>1.5.0</version>
+				<version>1.6.0</version>
 			</dependency>
 			<dependency>
 				<groupId>${project.groupId}</groupId>
 				<artifactId>naked-objects-fixture</artifactId>
-				<version>1.5.0</version>
+				<version>1.6.0</version>
 			</dependency>
 			<dependency>
 				<groupId>${project.groupId}</groupId>
 				<artifactId>naked-objects-webapp</artifactId>
-				<version>1.5.0</version>
+				<version>1.6.0</version>
 			</dependency>
 
 		</dependencies>
diff --git a/naked-objects/webapp/pom.xml b/naked-objects/webapp/pom.xml
index 9873589c7..3e018995a 100644
--- a/naked-objects/webapp/pom.xml
+++ b/naked-objects/webapp/pom.xml
@@ -16,7 +16,7 @@
 	<parent>
 		<groupId>com.iluwatar</groupId>
 		<artifactId>naked-objects</artifactId>
-		<version>1.5.0</version>
+		<version>1.6.0</version>
 	</parent>
 
 	<artifactId>naked-objects-webapp</artifactId>
diff --git a/null-object/pom.xml b/null-object/pom.xml
index dfa1c6891..eec32fd4d 100644
--- a/null-object/pom.xml
+++ b/null-object/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>null-object</artifactId>
   <dependencies>
diff --git a/object-pool/pom.xml b/object-pool/pom.xml
index 3226bf71c..4a3b237c6 100644
--- a/object-pool/pom.xml
+++ b/object-pool/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>object-pool</artifactId>
   <dependencies>
diff --git a/observer/pom.xml b/observer/pom.xml
index 49a484edf..19e93421c 100644
--- a/observer/pom.xml
+++ b/observer/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>observer</artifactId>
   <dependencies>
diff --git a/poison-pill/pom.xml b/poison-pill/pom.xml
index c3a5e46c1..2a0653981 100644
--- a/poison-pill/pom.xml
+++ b/poison-pill/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>poison-pill</artifactId>
   <dependencies>
diff --git a/pom.xml b/pom.xml
index 5a154164e..961d9b281 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
 
 	<groupId>com.iluwatar</groupId>
 	<artifactId>java-design-patterns</artifactId>
-	<version>1.5.0</version>
+	<version>1.6.0</version>
 	<packaging>pom</packaging>
 
 	<properties>
diff --git a/private-class-data/pom.xml b/private-class-data/pom.xml
index 6e6817621..70a716062 100644
--- a/private-class-data/pom.xml
+++ b/private-class-data/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>private-class-data</artifactId>
   <dependencies>
diff --git a/property/pom.xml b/property/pom.xml
index 6b0511fe0..5435f06f5 100644
--- a/property/pom.xml
+++ b/property/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>property</artifactId>
   <dependencies>
diff --git a/prototype/pom.xml b/prototype/pom.xml
index 39d8b7d33..0ebba706e 100644
--- a/prototype/pom.xml
+++ b/prototype/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>prototype</artifactId>
   <dependencies>
diff --git a/proxy/pom.xml b/proxy/pom.xml
index 560c456b8..1f625d736 100644
--- a/proxy/pom.xml
+++ b/proxy/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>proxy</artifactId>
   <dependencies>
diff --git a/repository/pom.xml b/repository/pom.xml
index fe3ca4c0d..db0a8af5f 100644
--- a/repository/pom.xml
+++ b/repository/pom.xml
@@ -6,7 +6,7 @@
 	<parent>
 		<groupId>com.iluwatar</groupId>
 		<artifactId>java-design-patterns</artifactId>
-		<version>1.5.0</version>
+		<version>1.6.0</version>
 	</parent>
 	<artifactId>repository</artifactId>
 	<dependencies>
diff --git a/resource-acquisition-is-initialization/pom.xml b/resource-acquisition-is-initialization/pom.xml
index fb965ca2d..c8382ceb8 100644
--- a/resource-acquisition-is-initialization/pom.xml
+++ b/resource-acquisition-is-initialization/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>resource-acquisition-is-initialization</artifactId>
   <dependencies>
diff --git a/servant/pom.xml b/servant/pom.xml
index b59a470f2..b6497215f 100644
--- a/servant/pom.xml
+++ b/servant/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>servant</artifactId>
   <dependencies>
diff --git a/service-layer/pom.xml b/service-layer/pom.xml
index 96e4e6dbf..8e0ea8322 100644
--- a/service-layer/pom.xml
+++ b/service-layer/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>service-layer</artifactId>
   <dependencies>
diff --git a/service-locator/pom.xml b/service-locator/pom.xml
index 6b287242e..a596e4b0c 100644
--- a/service-locator/pom.xml
+++ b/service-locator/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>service-locator</artifactId>
   <dependencies>
diff --git a/singleton/pom.xml b/singleton/pom.xml
index dfb5cff82..cdd9b613a 100644
--- a/singleton/pom.xml
+++ b/singleton/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>singleton</artifactId>
   <dependencies>
diff --git a/specification/pom.xml b/specification/pom.xml
index 53e92fef1..b4d6efe90 100644
--- a/specification/pom.xml
+++ b/specification/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>specification</artifactId>
   <dependencies>
diff --git a/state/pom.xml b/state/pom.xml
index e9178d0ae..0119146b3 100644
--- a/state/pom.xml
+++ b/state/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>state</artifactId>
   <dependencies>
diff --git a/step-builder/pom.xml b/step-builder/pom.xml
index 8466266a7..f9c98474b 100644
--- a/step-builder/pom.xml
+++ b/step-builder/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <artifactId>java-design-patterns</artifactId>
     <groupId>com.iluwatar</groupId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>step-builder</artifactId>
   <dependencies>
diff --git a/strategy/pom.xml b/strategy/pom.xml
index c24ccf9af..9532a8079 100644
--- a/strategy/pom.xml
+++ b/strategy/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>strategy</artifactId>
   <dependencies>
diff --git a/template-method/pom.xml b/template-method/pom.xml
index b0063c79e..53a7dc56e 100644
--- a/template-method/pom.xml
+++ b/template-method/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>template-method</artifactId>
   <dependencies>
diff --git a/thread-pool/pom.xml b/thread-pool/pom.xml
index 21f0bad3d..42e54de7e 100644
--- a/thread-pool/pom.xml
+++ b/thread-pool/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>thread-pool</artifactId>
   <dependencies>
diff --git a/tolerant-reader/pom.xml b/tolerant-reader/pom.xml
index fb28424d4..7e852d4ee 100644
--- a/tolerant-reader/pom.xml
+++ b/tolerant-reader/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>tolerant-reader</artifactId>
   <dependencies>
diff --git a/visitor/pom.xml b/visitor/pom.xml
index a420b3269..8adda4855 100644
--- a/visitor/pom.xml
+++ b/visitor/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.5.0</version>
+    <version>1.6.0</version>
   </parent>
   <artifactId>visitor</artifactId>
   <dependencies>