diff --git a/Readme.md b/Readme.md
index 192ae7e..6479dcd 100644
--- a/Readme.md
+++ b/Readme.md
@@ -68,7 +68,7 @@ The previously built .nar archive has to be copied into the nifi/lib directory
 and can be used after a restart of nifi.
 ```sh
 # Copy .nar into Nifi's lib folder
-cp nifi-prometheus-nar/target/nifi-prometheus-nar-1.8.0.nar NIFI_HOME/lib/nifi-prometheus-nar-1.8.0.nar
+cp nifi-prometheus-nar/target/nifi-prometheus-nar-1.9.0.nar NIFI_HOME/lib/nifi-prometheus-nar-1.9.0.nar
 
 # Start nifi
 NIFI_HOME/bin/nifi.sh start
diff --git a/nifi-prometheus-nar/pom.xml b/nifi-prometheus-nar/pom.xml
index 5a9501c..55d4726 100644
--- a/nifi-prometheus-nar/pom.xml
+++ b/nifi-prometheus-nar/pom.xml
@@ -18,7 +18,7 @@
     <parent>
         <groupId>org.apache.nifi</groupId>
         <artifactId>nifi-prometheus-bundle</artifactId>
-        <version>1.8.0</version>
+        <version>1.9.0</version>
     </parent>
 
     <artifactId>nifi-prometheus-nar</artifactId>
@@ -31,7 +31,7 @@
         <dependency>
             <groupId>org.apache.nifi</groupId>
             <artifactId>nifi-prometheus-reporting-task</artifactId>
-            <version>1.8.0</version>
+            <version>1.9.0</version>
         </dependency>
     </dependencies>
 </project>
diff --git a/nifi-prometheus-reporting-task/pom.xml b/nifi-prometheus-reporting-task/pom.xml
index 267591d..ec14a58 100644
--- a/nifi-prometheus-reporting-task/pom.xml
+++ b/nifi-prometheus-reporting-task/pom.xml
@@ -19,7 +19,7 @@
     <parent>
         <groupId>org.apache.nifi</groupId>
         <artifactId>nifi-prometheus-bundle</artifactId>
-        <version>1.8.0</version>
+        <version>1.9.0</version>
     </parent>
 	<properties>
 		<prometheus.version>0.5.0</prometheus.version>
diff --git a/pom.xml b/pom.xml
index ea19b97..bc5e998 100644
--- a/pom.xml
+++ b/pom.xml
@@ -17,13 +17,13 @@
 -->
     <modelVersion>4.0.0</modelVersion>
 	<properties>
-		<nifi.version>1.8.0</nifi.version>
+		<nifi.version>1.9.0</nifi.version>
 	</properties>
 
     <parent>
         <groupId>org.apache.nifi</groupId>
         <artifactId>nifi-nar-bundles</artifactId>
-        <version>1.8.0</version>
+        <version>1.9.0</version>
     </parent>
 
     <artifactId>nifi-prometheus-bundle</artifactId>