diff --git a/build.xml b/build.xml
index dbaa2f2c34..3bd1a78ce8 100644
--- a/build.xml
+++ b/build.xml
@@ -42,7 +42,7 @@ under the License.
 
     <description>The Apache POI project Ant build.</description>
 
-    <property name="version.id" value="5.0.1-SNAPSHOT"/>
+    <property name="version.id" value="5.1.1-SNAPSHOT"/>
     <property name="release.rc" value="RC1"/>
 
     <property environment="env"/>
diff --git a/osgi/pom.xml b/osgi/pom.xml
index 0c97f217db..461f040111 100644
--- a/osgi/pom.xml
+++ b/osgi/pom.xml
@@ -29,7 +29,7 @@
     <name>Apache POI OSGi bundle</name>
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <poi.version>5.0.1-SNAPSHOT</poi.version>
+        <poi.version>5.1.1-SNAPSHOT</poi.version>
         <pax.exam.version>4.12.0</pax.exam.version>
     </properties>
 
diff --git a/sonar/examples/pom.xml b/sonar/examples/pom.xml
index cbeb37f092..92777b4de2 100644
--- a/sonar/examples/pom.xml
+++ b/sonar/examples/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.apache.poi</groupId>
         <artifactId>poi-parent</artifactId>
-        <version>5.0.1-SNAPSHOT</version>
+        <version>5.1.1-SNAPSHOT</version>
     </parent>
     <artifactId>poi-examples</artifactId>
     <packaging>jar</packaging>
diff --git a/sonar/excelant/pom.xml b/sonar/excelant/pom.xml
index 20bfcf4c62..f54c92222e 100644
--- a/sonar/excelant/pom.xml
+++ b/sonar/excelant/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.apache.poi</groupId>
         <artifactId>poi-parent</artifactId>
-        <version>5.0.1-SNAPSHOT</version>
+        <version>5.1.1-SNAPSHOT</version>
     </parent>
     <artifactId>poi-excelant</artifactId>
     <packaging>jar</packaging>
diff --git a/sonar/integration-test/pom.xml b/sonar/integration-test/pom.xml
index 7fe0e86e2c..72990a0716 100644
--- a/sonar/integration-test/pom.xml
+++ b/sonar/integration-test/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.apache.poi</groupId>
         <artifactId>poi-parent</artifactId>
-        <version>5.0.1-SNAPSHOT</version>
+        <version>5.1.1-SNAPSHOT</version>
 
     </parent>
     <artifactId>integration-test</artifactId>
diff --git a/sonar/main/pom.xml b/sonar/main/pom.xml
index 30191125ff..25cd9d88b0 100644
--- a/sonar/main/pom.xml
+++ b/sonar/main/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.apache.poi</groupId>
         <artifactId>poi-parent</artifactId>
-        <version>5.0.1-SNAPSHOT</version>
+        <version>5.1.1-SNAPSHOT</version>
     </parent>
     <artifactId>poi-main</artifactId>
     <packaging>jar</packaging>
diff --git a/sonar/ooxml-full/pom.xml b/sonar/ooxml-full/pom.xml
index 3b10eff008..a921cfd1c4 100644
--- a/sonar/ooxml-full/pom.xml
+++ b/sonar/ooxml-full/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.apache.poi</groupId>
         <artifactId>poi-parent</artifactId>
-        <version>5.0.1-SNAPSHOT</version>
+        <version>5.1.1-SNAPSHOT</version>
         <relativePath>..</relativePath>
     </parent>
     <artifactId>poi-ooxml-lite</artifactId>
diff --git a/sonar/ooxml/pom.xml b/sonar/ooxml/pom.xml
index 75a1be215d..04ec4dc38d 100644
--- a/sonar/ooxml/pom.xml
+++ b/sonar/ooxml/pom.xml
@@ -4,7 +4,7 @@
     <parent>
         <groupId>org.apache.poi</groupId>
         <artifactId>poi-parent</artifactId>
-        <version>5.0.1-SNAPSHOT</version>
+        <version>5.1.1-SNAPSHOT</version>
     </parent>
     <artifactId>poi-ooxml</artifactId>
     <packaging>jar</packaging>
diff --git a/sonar/scratchpad/pom.xml b/sonar/scratchpad/pom.xml
index b5d1e80ef7..073823e419 100644
--- a/sonar/scratchpad/pom.xml
+++ b/sonar/scratchpad/pom.xml
@@ -6,7 +6,7 @@
     <parent>
         <groupId>org.apache.poi</groupId>
         <artifactId>poi-parent</artifactId>
-        <version>5.0.1-SNAPSHOT</version>
+        <version>5.1.1-SNAPSHOT</version>
     </parent>
     <artifactId>poi-scratchpad</artifactId>
     <packaging>jar</packaging>