diff --git a/GazelleHL7v2Validator-ear/pom.xml b/GazelleHL7v2Validator-ear/pom.xml
index ba8ba07f1a2e1f4243aca9382b71d287f1e95c03..876199f1e5f59a00ecccd9bcd86892099ee64226 100644
--- a/GazelleHL7v2Validator-ear/pom.xml
+++ b/GazelleHL7v2Validator-ear/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>GazelleHL7v2Validator</artifactId>
         <groupId>net.ihe.gazelle</groupId>
-        <version>3.9.1</version>
+        <version>3.9.1-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -11,7 +11,7 @@
     <artifactId>GazelleHL7v2Validator-ear</artifactId>
     <packaging>ear</packaging>
     <name>GazelleHL7v2Validator-ear</name>
-    <version>3.9.1</version>
+    <version>3.9.1-SNAPSHOT</version>
     <contributors>
         <contributor>
             <organization>INRIA - Rennes Bretagne Atlantique</organization>
@@ -105,14 +105,14 @@
             <groupId>net.ihe.gazelle</groupId>
             <artifactId>GazelleHL7v2Validator-ui</artifactId>
             <type>war</type>
-            <version>3.9.1</version>
+            <version>3.9.1-SNAPSHOT</version>
             <scope>compile</scope>
         </dependency>
         <dependency>
             <groupId>net.ihe.gazelle</groupId>
             <artifactId>GazelleHL7v2Validator-ejb</artifactId>
             <type>ejb</type>
-            <version>3.9.1</version>
+            <version>3.9.1-SNAPSHOT</version>
         </dependency>
         <dependency>
             <groupId>net.ihe.gazelle</groupId>
diff --git a/GazelleHL7v2Validator-ejb/pom.xml b/GazelleHL7v2Validator-ejb/pom.xml
index 1aec96821405313d8ddc9cf566277d7fcb9a8e21..df61b5918e2e1c0ae17b09675f3b5f5ffaa76d0b 100644
--- a/GazelleHL7v2Validator-ejb/pom.xml
+++ b/GazelleHL7v2Validator-ejb/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>GazelleHL7v2Validator</artifactId>
         <groupId>net.ihe.gazelle</groupId>
-        <version>3.9.1</version>
+        <version>3.9.1-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
@@ -270,7 +270,7 @@
         <dependency>
             <groupId>net.ihe.gazelle</groupId>
             <artifactId>gvt-validation-jar</artifactId>
-            <version>3.9.1</version>
+            <version>3.9.1-SNAPSHOT</version>
             <scope>compile</scope>
         </dependency>
         <dependency>
diff --git a/GazelleHL7v2Validator-ui/pom.xml b/GazelleHL7v2Validator-ui/pom.xml
index 44be84d767a6fd47821d36b00997793e7f2ba1e7..63e8cdb6f506838676ca96319027e43fccdfc345 100644
--- a/GazelleHL7v2Validator-ui/pom.xml
+++ b/GazelleHL7v2Validator-ui/pom.xml
@@ -3,7 +3,7 @@
   <parent>
     <artifactId>GazelleHL7v2Validator</artifactId>
     <groupId>net.ihe.gazelle</groupId>
-    <version>3.9.1</version>
+    <version>3.9.1-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
   <modelVersion>4.0.0</modelVersion>
@@ -11,7 +11,7 @@
   <artifactId>GazelleHL7v2Validator-ui</artifactId>
   <packaging>war</packaging>
   <name>GazelleHL7v2Validator-ui</name>
-  <version>3.9.1</version>
+  <version>3.9.1-SNAPSHOT</version>
   <description>Archetype for the UI part of our java projects</description>
   <organization>
     <name>INRIA - IHE Development</name>
diff --git a/gazelle-hl7-validator-report-jar/pom.xml b/gazelle-hl7-validator-report-jar/pom.xml
index 8d615712d5d39d50508bd8d83371b1ad87be219e..c614bfbc38894d6d3672eb547495b58e8b53819c 100644
--- a/gazelle-hl7-validator-report-jar/pom.xml
+++ b/gazelle-hl7-validator-report-jar/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>GazelleHL7v2Validator</artifactId>
         <groupId>net.ihe.gazelle</groupId>
-        <version>3.9.1</version>
+        <version>3.9.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <packaging>jar</packaging>
diff --git a/gazelle-hl7v2-validator-api-jar/pom.xml b/gazelle-hl7v2-validator-api-jar/pom.xml
index 14864d9c1e73f809680a9b34ff5624c035bb9068..6c8d64b01973636035b6c9730d1d8f6afcbcdaa5 100644
--- a/gazelle-hl7v2-validator-api-jar/pom.xml
+++ b/gazelle-hl7v2-validator-api-jar/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>GazelleHL7v2Validator</artifactId>
         <groupId>net.ihe.gazelle</groupId>
-        <version>3.9.1</version>
+        <version>3.9.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/gvt-validation-jar/pom.xml b/gvt-validation-jar/pom.xml
index a72856e146ef1caa5ab94a002083216360b817ee..ffcee173193c7e21644622c780cf2f22594c9b28 100644
--- a/gvt-validation-jar/pom.xml
+++ b/gvt-validation-jar/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>GazelleHL7v2Validator</artifactId>
         <groupId>net.ihe.gazelle</groupId>
-        <version>3.9.1</version>
+        <version>3.9.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/pom.xml b/pom.xml
index f1a32627cd526a8ce91384282019ef8bf1b70377..781b8eb1bb545b5d51f69983bac87450ca6a8f0b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -8,7 +8,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>net.ihe.gazelle</groupId>
     <artifactId>GazelleHL7v2Validator</artifactId>
-    <version>3.9.1</version>
+    <version>3.9.1-SNAPSHOT</version>
     <packaging>pom</packaging>
     <name>GazelleHL7v2Validator</name>
     <description>parent for project GazelleHL7v2Validator</description>
@@ -26,7 +26,7 @@
         <connection>scm:git:${git.project.url}</connection>
         <url>scm:git:${git.project.url}</url>
         <developerConnection>scm:git:${git.project.url}</developerConnection>
-        <tag>3.9.1</tag>
+        <tag>HEAD</tag>
     </scm>
 
     <organization>
@@ -89,27 +89,27 @@
             <dependency>
                 <groupId>net.ihe.gazelle</groupId>
                 <artifactId>gazelle-hl7-validator-report-jar</artifactId>
-                <version>3.9.1</version>
+                <version>3.9.1-SNAPSHOT</version>
             </dependency>
             <dependency>
                 <groupId>net.ihe.gazelle</groupId>
                 <artifactId>gazelle-hl7v2-validator-api-jar</artifactId>
-                <version>3.9.1</version>
+                <version>3.9.1-SNAPSHOT</version>
             </dependency>
             <dependency>
                 <groupId>net.ihe.gazelle</groupId>
                 <artifactId>GazelleHL7v2Validator-ejb</artifactId>
-                <version>3.9.1</version>
+                <version>3.9.1-SNAPSHOT</version>
             </dependency>
             <dependency>
                 <groupId>net.ihe.gazelle</groupId>
                 <artifactId>GazelleHL7v2Validator-ear</artifactId>
-                <version>3.9.1</version>
+                <version>3.9.1-SNAPSHOT</version>
             </dependency>
             <dependency>
                 <groupId>net.ihe.gazelle</groupId>
                 <artifactId>GazelleHL7v2Validator-ui</artifactId>
-                <version>3.9.1</version>
+                <version>3.9.1-SNAPSHOT</version>
             </dependency>
             <dependency>
                 <groupId>net.ihe.gazelle</groupId>