diff --git a/pom.xml b/pom.xml
index d084ea652785bebd9e975ea9a2665a71b26a3c4e..7637c2eee555fef6c307a7a08004847f4ccfd3b0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -18,7 +18,7 @@
     <artifactId>smp-modules</artifactId>
     <packaging>pom</packaging>
     <name>SMP</name>
-    <version>5.0</version>
+    <version>5.1-SNAPSHOT</version>
 
     <modules>
         <module>smp-angular</module>
@@ -129,7 +129,7 @@
     <scm>
         <developerConnection>scm:git:https://ec.europa.eu/digital-building-blocks/code/scm/edelivery/smp.git
         </developerConnection>
-        <tag>5.0</tag>
+        <tag>HEAD</tag>
     </scm>
 
     <repositories>
diff --git a/smp-aggregator/pom.xml b/smp-aggregator/pom.xml
index 527bb0decc273b75a8611e7cee7e78a054826c78..487bbbaf31b1eb75e90bbd9ad4d8a676b15a5d15 100644
--- a/smp-aggregator/pom.xml
+++ b/smp-aggregator/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <artifactId>smp-modules</artifactId>
         <groupId>eu.europa.ec.edelivery</groupId>
-        <version>5.0</version>
+        <version>5.1-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/smp-angular/pom.xml b/smp-angular/pom.xml
index a63e9016c12309a64c579f4c509c0c13d42d6405..4f669f21954238fdd2077b52496cae66611fb88d 100644
--- a/smp-angular/pom.xml
+++ b/smp-angular/pom.xml
@@ -6,7 +6,7 @@
   <parent>
     <groupId>eu.europa.ec.edelivery</groupId>
     <artifactId>smp-modules</artifactId>
-    <version>5.0</version>
+    <version>5.1-SNAPSHOT</version>
     <relativePath>../pom.xml</relativePath>
   </parent>
   <artifactId>smp-angular</artifactId>
diff --git a/smp-examples/pom.xml b/smp-examples/pom.xml
index eac9dd034d7872f8fe8c93fcf62670ec269ef320..780759819e1fa7f3a1fb23022c963ff59dcdbfd6 100644
--- a/smp-examples/pom.xml
+++ b/smp-examples/pom.xml
@@ -17,7 +17,7 @@
     <parent>
         <groupId>eu.europa.ec.edelivery</groupId>
         <artifactId>smp-modules</artifactId>
-        <version>5.0</version>
+        <version>5.1-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>smp-examples</artifactId>
diff --git a/smp-examples/resource-spi-example/pom.xml b/smp-examples/resource-spi-example/pom.xml
index 2ab3b22aee0f31ccd5661724f872e46a9995be89..a3bd2c3eae3e3284de00f0a98c970190bcb827e2 100644
--- a/smp-examples/resource-spi-example/pom.xml
+++ b/smp-examples/resource-spi-example/pom.xml
@@ -17,7 +17,7 @@
     <parent>
         <groupId>eu.europa.ec.edelivery</groupId>
         <artifactId>smp-modules</artifactId>
-        <version>5.0</version>
+        <version>5.1-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>
diff --git a/smp-examples/smp-spi-payload-validation-example/pom.xml b/smp-examples/smp-spi-payload-validation-example/pom.xml
index 4d81bf08a6e64011ad9c3da71ee3c03bb4d2f98f..74039b668aef3b9e4498ae42925373fef2d9a5b1 100644
--- a/smp-examples/smp-spi-payload-validation-example/pom.xml
+++ b/smp-examples/smp-spi-payload-validation-example/pom.xml
@@ -17,7 +17,7 @@
     <parent>
         <groupId>eu.europa.ec.edelivery</groupId>
         <artifactId>smp-modules</artifactId>
-        <version>5.0</version>
+        <version>5.1-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>
diff --git a/smp-resource-extensions/oasis-cppa3-spi/pom.xml b/smp-resource-extensions/oasis-cppa3-spi/pom.xml
index c76f0308854328e59ddcfb008ada38d3b9e5ea1f..47c61eb589cd9a65b9b27935b6d0a58c520dcccc 100644
--- a/smp-resource-extensions/oasis-cppa3-spi/pom.xml
+++ b/smp-resource-extensions/oasis-cppa3-spi/pom.xml
@@ -17,7 +17,7 @@
     <parent>
         <groupId>eu.europa.ec.edelivery</groupId>
         <artifactId>smp-modules</artifactId>
-        <version>5.0</version>
+        <version>5.1-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>
diff --git a/smp-resource-extensions/oasis-smp-spi/pom.xml b/smp-resource-extensions/oasis-smp-spi/pom.xml
index 85fefa5dc1abe76e4bc91a0326c980161c04de36..beec13c9931be86c6827fda02af18006936dcb84 100644
--- a/smp-resource-extensions/oasis-smp-spi/pom.xml
+++ b/smp-resource-extensions/oasis-smp-spi/pom.xml
@@ -17,7 +17,7 @@
     <parent>
         <groupId>eu.europa.ec.edelivery</groupId>
         <artifactId>smp-modules</artifactId>
-        <version>5.0</version>
+        <version>5.1-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <properties>
diff --git a/smp-resource-extensions/pom.xml b/smp-resource-extensions/pom.xml
index 2e7e5063101a4c0c42cc4eeaa769cfd54fcb0fbd..26ff1819b8ef0ec9c9d6d391ea5f539cfb0beb54 100644
--- a/smp-resource-extensions/pom.xml
+++ b/smp-resource-extensions/pom.xml
@@ -17,7 +17,7 @@
     <parent>
         <groupId>eu.europa.ec.edelivery</groupId>
         <artifactId>smp-modules</artifactId>
-        <version>5.0</version>
+        <version>5.1-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>smp-resource-extensions</artifactId>
diff --git a/smp-server-library/pom.xml b/smp-server-library/pom.xml
index 8073e792279ecae62fc93e57ab44e2d39883bf59..27898b2467151108a6e6aa39bc2890575e96d190 100644
--- a/smp-server-library/pom.xml
+++ b/smp-server-library/pom.xml
@@ -16,7 +16,7 @@
     <parent>
         <groupId>eu.europa.ec.edelivery</groupId>
         <artifactId>smp-modules</artifactId>
-        <version>5.0</version>
+        <version>5.1-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>smp-server-library</artifactId>
diff --git a/smp-soapui-tests/pom.xml b/smp-soapui-tests/pom.xml
index ceff1c3ebaed355984e11799b25e70b6e605384f..668e02cd9d87ba8060101673a9afe9f6cd7f60f7 100644
--- a/smp-soapui-tests/pom.xml
+++ b/smp-soapui-tests/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>eu.europa.ec.edelivery</groupId>
         <artifactId>smp-modules</artifactId>
-        <version>5.0</version>
+        <version>5.1-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>smp-soapui-tests</artifactId>
diff --git a/smp-spi/pom.xml b/smp-spi/pom.xml
index 1edd51cabd97f86da371e0129794169461e20bc8..7ca4f2ead2fa1e4483b31b120d2f118167a3a7e1 100644
--- a/smp-spi/pom.xml
+++ b/smp-spi/pom.xml
@@ -17,7 +17,7 @@
     <parent>
         <groupId>eu.europa.ec.edelivery</groupId>
         <artifactId>smp-modules</artifactId>
-        <version>5.0</version>
+        <version>5.1-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>smp-spi</artifactId>
diff --git a/smp-springboot/pom.xml b/smp-springboot/pom.xml
index 4c37c12292f8e50e18af512c102b689eb8bb01ca..d40de2ec6226525b07043660c85cd21040ada191 100644
--- a/smp-springboot/pom.xml
+++ b/smp-springboot/pom.xml
@@ -19,7 +19,7 @@ limitations under the License.
     <parent>
         <groupId>eu.europa.ec.edelivery</groupId>
         <artifactId>smp-modules</artifactId>
-        <version>5.0</version>
+        <version>5.1-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>smp-springboot</artifactId>
diff --git a/smp-webapp/pom.xml b/smp-webapp/pom.xml
index 6ed85d63a9803ade4fcf71df2601d18dbe494001..099ea45a633401ecb98317e09c27fe054b5c63a8 100644
--- a/smp-webapp/pom.xml
+++ b/smp-webapp/pom.xml
@@ -3,7 +3,7 @@
     <parent>
         <groupId>eu.europa.ec.edelivery</groupId>
         <artifactId>smp-modules</artifactId>
-        <version>5.0</version>
+        <version>5.1-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
     <artifactId>smp</artifactId>