diff --git a/coverage-reports/pom.xml b/coverage-reports/pom.xml
index 5d62844128..10d46dada7 100644
--- a/coverage-reports/pom.xml
+++ b/coverage-reports/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>io.siddhi</groupId>
         <artifactId>siddhi</artifactId>
-        <version>5.1.8</version>
+        <version>5.1.9-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/siddhi-annotations/pom.xml b/modules/siddhi-annotations/pom.xml
index a12129535b..ff4491b4ce 100644
--- a/modules/siddhi-annotations/pom.xml
+++ b/modules/siddhi-annotations/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <groupId>io.siddhi</groupId>
         <artifactId>siddhi</artifactId>
-        <version>5.1.8</version>
+        <version>5.1.9-SNAPSHOT</version>
         <relativePath>../..</relativePath>
     </parent>
 
diff --git a/modules/siddhi-core/pom.xml b/modules/siddhi-core/pom.xml
index 0b57512a77..0d9b5841c8 100644
--- a/modules/siddhi-core/pom.xml
+++ b/modules/siddhi-core/pom.xml
@@ -21,7 +21,7 @@
     <parent>
         <artifactId>siddhi</artifactId>
         <groupId>io.siddhi</groupId>
-        <version>5.1.8</version>
+        <version>5.1.9-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
 
     </parent>
diff --git a/modules/siddhi-core/siddhi-core-doc-gen/pom.xml b/modules/siddhi-core/siddhi-core-doc-gen/pom.xml
index 00b53e9612..e8992cb2b3 100644
--- a/modules/siddhi-core/siddhi-core-doc-gen/pom.xml
+++ b/modules/siddhi-core/siddhi-core-doc-gen/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>siddhi</artifactId>
         <groupId>io.siddhi</groupId>
-        <version>5.1.8</version>
+        <version>5.1.9-SNAPSHOT</version>
         <relativePath>../../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/modules/siddhi-doc-gen/pom.xml b/modules/siddhi-doc-gen/pom.xml
index bb27133cf1..a150e0184c 100644
--- a/modules/siddhi-doc-gen/pom.xml
+++ b/modules/siddhi-doc-gen/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>siddhi</artifactId>
         <groupId>io.siddhi</groupId>
-        <version>5.1.8</version>
+        <version>5.1.9-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/modules/siddhi-feature/pom.xml b/modules/siddhi-feature/pom.xml
index 890db52503..43adac37c1 100644
--- a/modules/siddhi-feature/pom.xml
+++ b/modules/siddhi-feature/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>siddhi</artifactId>
         <groupId>io.siddhi</groupId>
-        <version>5.1.8</version>
+        <version>5.1.9-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/modules/siddhi-query-api/pom.xml b/modules/siddhi-query-api/pom.xml
index 32a4f220b9..0936933af0 100644
--- a/modules/siddhi-query-api/pom.xml
+++ b/modules/siddhi-query-api/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>siddhi</artifactId>
         <groupId>io.siddhi</groupId>
-        <version>5.1.8</version>
+        <version>5.1.9-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/modules/siddhi-query-compiler/pom.xml b/modules/siddhi-query-compiler/pom.xml
index 2ad2a3c289..b44d0e87a7 100644
--- a/modules/siddhi-query-compiler/pom.xml
+++ b/modules/siddhi-query-compiler/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>siddhi</artifactId>
         <groupId>io.siddhi</groupId>
-        <version>5.1.8</version>
+        <version>5.1.9-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/modules/siddhi-samples/performance-samples/pom.xml b/modules/siddhi-samples/performance-samples/pom.xml
index 1a50141918..c837d42c0d 100644
--- a/modules/siddhi-samples/performance-samples/pom.xml
+++ b/modules/siddhi-samples/performance-samples/pom.xml
@@ -21,7 +21,7 @@
     <parent>
         <groupId>io.siddhi</groupId>
         <artifactId>siddhi-samples</artifactId>
-        <version>5.1.8</version>
+        <version>5.1.9-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>performance-samples</artifactId>
diff --git a/modules/siddhi-samples/pom.xml b/modules/siddhi-samples/pom.xml
index 1a9a491889..813ebc00eb 100644
--- a/modules/siddhi-samples/pom.xml
+++ b/modules/siddhi-samples/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>siddhi</artifactId>
         <groupId>io.siddhi</groupId>
-        <version>5.1.8</version>
+        <version>5.1.9-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
     <modelVersion>4.0.0</modelVersion>
diff --git a/modules/siddhi-samples/quick-start-samples/pom.xml b/modules/siddhi-samples/quick-start-samples/pom.xml
index b8b36dd67a..55adfd5f83 100644
--- a/modules/siddhi-samples/quick-start-samples/pom.xml
+++ b/modules/siddhi-samples/quick-start-samples/pom.xml
@@ -21,7 +21,7 @@
     <parent>
         <artifactId>siddhi-samples</artifactId>
         <groupId>io.siddhi</groupId>
-        <version>5.1.8</version>
+        <version>5.1.9-SNAPSHOT</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
diff --git a/modules/siddhi-service/pom.xml b/modules/siddhi-service/pom.xml
index 0b552f1529..cadbf96d35 100644
--- a/modules/siddhi-service/pom.xml
+++ b/modules/siddhi-service/pom.xml
@@ -20,7 +20,7 @@
     <parent>
         <artifactId>siddhi</artifactId>
         <groupId>io.siddhi</groupId>
-        <version>5.1.8</version>
+        <version>5.1.9-SNAPSHOT</version>
         <relativePath>../../pom.xml</relativePath>
     </parent>
 
diff --git a/pom.xml b/pom.xml
index 91ab0a2a62..1783a60c2d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -23,7 +23,7 @@
     <groupId>io.siddhi</groupId>
     <artifactId>siddhi</artifactId>
     <packaging>pom</packaging>
-    <version>5.1.8</version>
+    <version>5.1.9-SNAPSHOT</version>
     <name>Siddhi</name>
     <description>Siddhi, Stream Processing and Complex Event Processing Engine</description>
 
@@ -834,7 +834,7 @@
         <url>https://github.com/siddhi-io/siddhi.git</url>
         <developerConnection>scm:git:https://github.com/siddhi-io/siddhi.git</developerConnection>
         <connection>scm:git:https://github.com/siddhi-io/siddhi.git</connection>
-        <tag>v5.1.8</tag>
+        <tag>HEAD</tag>
     </scm>
 
     <repositories>