diff --git a/client/oslc-client-base/pom.xml b/client/oslc-client-base/pom.xml
index 0aeddc463..9703a77f1 100644
--- a/client/oslc-client-base/pom.xml
+++ b/client/oslc-client-base/pom.xml
@@ -6,11 +6,11 @@
   <parent>
     <groupId>org.eclipse.lyo.clients</groupId>
     <artifactId>clients-parent</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>oslc-client-base</artifactId>
-  <version>4.1.0.M1</version>
+  <version>4.1.0-SNAPSHOT</version>
   <name>Lyo :: Client :: Base</name>
 
   <properties>
diff --git a/client/oslc-client/pom.xml b/client/oslc-client/pom.xml
index fb05ee8de..2744b9b3a 100644
--- a/client/oslc-client/pom.xml
+++ b/client/oslc-client/pom.xml
@@ -5,12 +5,12 @@
     <parent>
       <groupId>org.eclipse.lyo.clients</groupId>
       <artifactId>clients-parent</artifactId>
-      <version>4.1.0.M1</version>
+      <version>4.1.0-SNAPSHOT</version>
       <relativePath>../pom.xml</relativePath>
     </parent>
 
     <artifactId>oslc-client</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <name>Lyo :: Client :: OSLC JAX-RS 2.0 (new)</name>
     <description>Eclipse Lyo OSLC Java client based on OSLC4J and JAX-RS 2.0</description>
 
diff --git a/client/oslc-java-client-resources/pom.xml b/client/oslc-java-client-resources/pom.xml
index 32de040f8..26994c212 100644
--- a/client/oslc-java-client-resources/pom.xml
+++ b/client/oslc-java-client-resources/pom.xml
@@ -6,11 +6,11 @@
   <parent>
     <groupId>org.eclipse.lyo.clients</groupId>
     <artifactId>clients-parent</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>oslc-java-client-resources</artifactId>
-  <version>4.1.0.M1</version>
+  <version>4.1.0-SNAPSHOT</version>
   <name>Lyo :: Client :: Resources (legacy)</name>
 
   <properties>
diff --git a/client/oslc-java-client/pom.xml b/client/oslc-java-client/pom.xml
index 306cacf32..08da79587 100644
--- a/client/oslc-java-client/pom.xml
+++ b/client/oslc-java-client/pom.xml
@@ -4,10 +4,10 @@
   <parent>
     <groupId>org.eclipse.lyo.clients</groupId>
     <artifactId>clients-parent</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
   </parent>
   <artifactId>oslc-java-client</artifactId>
-  <version>4.1.0.M1</version>
+  <version>4.1.0-SNAPSHOT</version>
   <name>Lyo :: Client :: OSLC Wink (legacy)</name>
 
   <description>Eclipse Lyo OSLC Java client based on OSLC4J and Apache Wink.</description>
diff --git a/client/pom.xml b/client/pom.xml
index 1aa508474..cdf9cb448 100644
--- a/client/pom.xml
+++ b/client/pom.xml
@@ -6,13 +6,13 @@
 
   <groupId>org.eclipse.lyo.clients</groupId>
   <artifactId>clients-parent</artifactId>
-  <version>4.1.0.M1</version>
+  <version>4.1.0-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>Lyo :: Client :: _Parent</name>
   <parent>
     <groupId>org.eclipse.lyo</groupId>
     <artifactId>lyo-parent</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/core/oslc-query/pom.xml b/core/oslc-query/pom.xml
index 03859caf9..ac8effe6b 100644
--- a/core/oslc-query/pom.xml
+++ b/core/oslc-query/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>org.eclipse.lyo.oslc4j.core</groupId>
     <artifactId>oslc4j-core-build</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <relativePath>../oslc4j-core-build/pom.xml</relativePath>
   </parent>
 
diff --git a/core/oslc-trs/pom.xml b/core/oslc-trs/pom.xml
index 58f523364..f16d43773 100644
--- a/core/oslc-trs/pom.xml
+++ b/core/oslc-trs/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>org.eclipse.lyo.oslc4j.core</groupId>
     <artifactId>oslc4j-core-build</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <relativePath>../oslc4j-core-build/pom.xml</relativePath>
   </parent>
 
diff --git a/core/oslc4j-core-build/pom.xml b/core/oslc4j-core-build/pom.xml
index f93fe793b..f92149e0a 100644
--- a/core/oslc4j-core-build/pom.xml
+++ b/core/oslc4j-core-build/pom.xml
@@ -8,7 +8,7 @@
   <parent>
     <groupId>org.eclipse.lyo</groupId>
     <artifactId>lyo-parent</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/core/oslc4j-core/pom.xml b/core/oslc4j-core/pom.xml
index a4665d82e..7b6974fa9 100644
--- a/core/oslc4j-core/pom.xml
+++ b/core/oslc4j-core/pom.xml
@@ -4,7 +4,7 @@
   <parent>
     <groupId>org.eclipse.lyo.oslc4j.core</groupId>
     <artifactId>oslc4j-core-build</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <relativePath>../oslc4j-core-build/pom.xml</relativePath>
   </parent>
   <artifactId>oslc4j-core</artifactId>
diff --git a/core/oslc4j-jena-provider/pom.xml b/core/oslc4j-jena-provider/pom.xml
index 8f1c44a3c..a15f0676b 100644
--- a/core/oslc4j-jena-provider/pom.xml
+++ b/core/oslc4j-jena-provider/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.eclipse.lyo.oslc4j.core</groupId>
         <artifactId>oslc4j-core-build</artifactId>
-        <version>4.1.0.M1</version>
+        <version>4.1.0-SNAPSHOT</version>
         <relativePath>../oslc4j-core-build/pom.xml</relativePath>
     </parent>
     <artifactId>oslc4j-jena-provider</artifactId>
diff --git a/core/oslc4j-json4j-provider/pom.xml b/core/oslc4j-json4j-provider/pom.xml
index adf718e99..194df08cb 100644
--- a/core/oslc4j-json4j-provider/pom.xml
+++ b/core/oslc4j-json4j-provider/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.eclipse.lyo.oslc4j.core</groupId>
         <artifactId>oslc4j-core-build</artifactId>
-        <version>4.1.0.M1</version>
+        <version>4.1.0-SNAPSHOT</version>
         <relativePath>../oslc4j-core-build/pom.xml</relativePath>
     </parent>
     <artifactId>oslc4j-json4j-provider</artifactId>
diff --git a/core/oslc4j-utils/pom.xml b/core/oslc4j-utils/pom.xml
index ba2e52804..503131111 100644
--- a/core/oslc4j-utils/pom.xml
+++ b/core/oslc4j-utils/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.eclipse.lyo.oslc4j.core</groupId>
         <artifactId>oslc4j-core-build</artifactId>
-        <version>4.1.0.M1</version>
+        <version>4.1.0-SNAPSHOT</version>
         <relativePath>../oslc4j-core-build/pom.xml</relativePath>
     </parent>
     <name>Lyo :: Core :: Utilities</name>
diff --git a/core/shacl/pom.xml b/core/shacl/pom.xml
index cfb70ff59..df2d07855 100644
--- a/core/shacl/pom.xml
+++ b/core/shacl/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>org.eclipse.lyo.oslc4j.core</groupId>
     <artifactId>oslc4j-core-build</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <relativePath>../oslc4j-core-build/pom.xml</relativePath>
   </parent>
 
diff --git a/domains/oslc-domains/pom.xml b/domains/oslc-domains/pom.xml
index 0bcbebdc4..5c9737746 100644
--- a/domains/oslc-domains/pom.xml
+++ b/domains/oslc-domains/pom.xml
@@ -9,14 +9,14 @@
     <parent>
         <groupId>org.eclipse.lyo</groupId>
         <artifactId>lyo-parent</artifactId>
-        <version>4.1.0.M1</version>
+        <version>4.1.0-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <!-- End of user code
     -->
     <groupId>org.eclipse.lyo</groupId>
     <artifactId>oslc-domains</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <packaging>jar</packaging>
     <name>Lyo :: Domains</name>
     <properties>
diff --git a/pom.xml b/pom.xml
index abac1f944..de4fd6036 100644
--- a/pom.xml
+++ b/pom.xml
@@ -4,7 +4,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.eclipse.lyo</groupId>
   <artifactId>lyo-parent</artifactId>
-  <version>4.1.0.M1</version>
+  <version>4.1.0-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>Lyo :: _Parent</name>
 
diff --git a/server/oauth-consumer-store/pom.xml b/server/oauth-consumer-store/pom.xml
index 6cb5e63e6..cc1ede4f0 100644
--- a/server/oauth-consumer-store/pom.xml
+++ b/server/oauth-consumer-store/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.eclipse.lyo.oslc4j.server</groupId>
         <artifactId>lyo-server-build</artifactId>
-        <version>4.1.0.M1</version>
+        <version>4.1.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <groupId>org.eclipse.lyo.server</groupId>
diff --git a/server/oauth-core/pom.xml b/server/oauth-core/pom.xml
index d5da895f9..ca2e3ff4a 100644
--- a/server/oauth-core/pom.xml
+++ b/server/oauth-core/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.eclipse.lyo.oslc4j.server</groupId>
         <artifactId>lyo-server-build</artifactId>
-        <version>4.1.0.M1</version>
+        <version>4.1.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <groupId>org.eclipse.lyo.server</groupId>
diff --git a/server/oauth-webapp/pom.xml b/server/oauth-webapp/pom.xml
index edf7f4063..0b140ceca 100644
--- a/server/oauth-webapp/pom.xml
+++ b/server/oauth-webapp/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.eclipse.lyo.oslc4j.server</groupId>
         <artifactId>lyo-server-build</artifactId>
-        <version>4.1.0.M1</version>
+        <version>4.1.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <groupId>org.eclipse.lyo.server</groupId>
diff --git a/server/oslc-ui-model/pom.xml b/server/oslc-ui-model/pom.xml
index 909dee596..f3fd2c6ec 100644
--- a/server/oslc-ui-model/pom.xml
+++ b/server/oslc-ui-model/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.eclipse.lyo.oslc4j.server</groupId>
         <artifactId>lyo-server-build</artifactId>
-        <version>4.1.0.M1</version>
+        <version>4.1.0-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <groupId>org.eclipse.lyo.server</groupId>
diff --git a/server/oslc4j-registry/pom.xml b/server/oslc4j-registry/pom.xml
index f0e3389da..007baa65b 100644
--- a/server/oslc4j-registry/pom.xml
+++ b/server/oslc4j-registry/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>org.eclipse.lyo.oslc4j.server</groupId>
     <artifactId>lyo-server-build</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
   <groupId>org.eclipse.lyo.oslc4j.core</groupId>
diff --git a/server/oslc4j-wink/pom.xml b/server/oslc4j-wink/pom.xml
index 8368b77a6..d30b15a34 100644
--- a/server/oslc4j-wink/pom.xml
+++ b/server/oslc4j-wink/pom.xml
@@ -5,7 +5,7 @@
   <parent>
     <groupId>org.eclipse.lyo.oslc4j.server</groupId>
     <artifactId>lyo-server-build</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
   <groupId>org.eclipse.lyo.oslc4j.core</groupId>
diff --git a/server/pom.xml b/server/pom.xml
index f3867fefd..4827f6601 100644
--- a/server/pom.xml
+++ b/server/pom.xml
@@ -10,7 +10,7 @@
   <parent>
     <groupId>org.eclipse.lyo</groupId>
     <artifactId>lyo-parent</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/store/pom.xml b/store/pom.xml
index f8e95bfd5..94d1e72fe 100644
--- a/store/pom.xml
+++ b/store/pom.xml
@@ -6,14 +6,14 @@
 
   <groupId>org.eclipse.lyo.store</groupId>
   <artifactId>store-parent</artifactId>
-  <version>4.1.0.M1</version>
+  <version>4.1.0-SNAPSHOT</version>
   <packaging>pom</packaging>
   <name>Lyo :: Store :: _Parent</name>
 
   <parent>
     <groupId>org.eclipse.lyo</groupId>
     <artifactId>lyo-parent</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
   </parent>
 
   <properties>
diff --git a/store/store-core/pom.xml b/store/store-core/pom.xml
index 77abec28b..3aa9e4be8 100644
--- a/store/store-core/pom.xml
+++ b/store/store-core/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>org.eclipse.lyo.store</groupId>
     <artifactId>store-parent</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/trs/client/client-source-mqtt/pom.xml b/trs/client/client-source-mqtt/pom.xml
index 239efec86..cfee310ff 100644
--- a/trs/client/client-source-mqtt/pom.xml
+++ b/trs/client/client-source-mqtt/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>org.eclipse.lyo.trs</groupId>
     <artifactId>trs-parent</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/trs/client/pom.xml b/trs/client/pom.xml
index 607a0736f..3dcc9c662 100644
--- a/trs/client/pom.xml
+++ b/trs/client/pom.xml
@@ -10,7 +10,7 @@
   <parent>
     <groupId>org.eclipse.lyo</groupId>
     <artifactId>lyo-parent</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/trs/client/trs-client/pom.xml b/trs/client/trs-client/pom.xml
index 08246bf0e..95376ae1c 100644
--- a/trs/client/trs-client/pom.xml
+++ b/trs/client/trs-client/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>org.eclipse.lyo.trs</groupId>
     <artifactId>trs-parent</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
 
diff --git a/trs/server/pom.xml b/trs/server/pom.xml
index 2bde7bf64..e5759deb2 100644
--- a/trs/server/pom.xml
+++ b/trs/server/pom.xml
@@ -20,13 +20,13 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>org.eclipse.lyo.trs</groupId>
   <artifactId>trs-server</artifactId>
-  <version>4.1.0.M1</version>
+  <version>4.1.0-SNAPSHOT</version>
   <name>Lyo :: TRS :: Server</name>
 
   <parent>
     <groupId>org.eclipse.lyo</groupId>
     <artifactId>lyo-parent</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <relativePath>../../pom.xml</relativePath>
   </parent>
 
diff --git a/validation/pom.xml b/validation/pom.xml
index 08b544a91..0a7eba4e5 100644
--- a/validation/pom.xml
+++ b/validation/pom.xml
@@ -3,13 +3,13 @@
   <modelVersion>4.0.0</modelVersion>
   <!--	<groupId>org.eclipse.lyo</groupId>-->
   <artifactId>lyo-validation</artifactId>
-  <version>4.1.0.M1</version>
+  <version>4.1.0-SNAPSHOT</version>
   <name>Lyo :: Validation</name>
 
   <parent>
     <groupId>org.eclipse.lyo</groupId>
     <artifactId>lyo-parent</artifactId>
-    <version>4.1.0.M1</version>
+    <version>4.1.0-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>