diff --git a/apache-maven/pom.xml b/apache-maven/pom.xml
index c17f8a6d5e6..5f713bb71c2 100644
--- a/apache-maven/pom.xml
+++ b/apache-maven/pom.xml
@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven</artifactId>
-    <version>3.8.3</version>
+    <version>3.8.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>apache-maven</artifactId>
diff --git a/maven-artifact/pom.xml b/maven-artifact/pom.xml
index 6cf8468499a..68af732ea55 100644
--- a/maven-artifact/pom.xml
+++ b/maven-artifact/pom.xml
@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven</artifactId>
-    <version>3.8.3</version>
+    <version>3.8.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-artifact</artifactId>
diff --git a/maven-builder-support/pom.xml b/maven-builder-support/pom.xml
index 959d8ec3fc8..897fe185f4b 100644
--- a/maven-builder-support/pom.xml
+++ b/maven-builder-support/pom.xml
@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven</artifactId>
-    <version>3.8.3</version>
+    <version>3.8.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-builder-support</artifactId>
diff --git a/maven-compat/pom.xml b/maven-compat/pom.xml
index 75e2289d2f0..221bf2c19cc 100644
--- a/maven-compat/pom.xml
+++ b/maven-compat/pom.xml
@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven</artifactId>
-    <version>3.8.3</version>
+    <version>3.8.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-compat</artifactId>
diff --git a/maven-core/pom.xml b/maven-core/pom.xml
index d4c5111666c..86aea1ff231 100644
--- a/maven-core/pom.xml
+++ b/maven-core/pom.xml
@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven</artifactId>
-    <version>3.8.3</version>
+    <version>3.8.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-core</artifactId>
diff --git a/maven-embedder/pom.xml b/maven-embedder/pom.xml
index 1c632c93f88..af2cd81ce59 100644
--- a/maven-embedder/pom.xml
+++ b/maven-embedder/pom.xml
@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven</artifactId>
-    <version>3.8.3</version>
+    <version>3.8.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-embedder</artifactId>
diff --git a/maven-model-builder/pom.xml b/maven-model-builder/pom.xml
index 8cb1008a667..e08f1af2873 100644
--- a/maven-model-builder/pom.xml
+++ b/maven-model-builder/pom.xml
@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven</artifactId>
-    <version>3.8.3</version>
+    <version>3.8.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-model-builder</artifactId>
diff --git a/maven-model/pom.xml b/maven-model/pom.xml
index df81d72f91c..f7e07c866ba 100644
--- a/maven-model/pom.xml
+++ b/maven-model/pom.xml
@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven</artifactId>
-    <version>3.8.3</version>
+    <version>3.8.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-model</artifactId>
diff --git a/maven-plugin-api/pom.xml b/maven-plugin-api/pom.xml
index a1a72a1967b..630a46cf283 100644
--- a/maven-plugin-api/pom.xml
+++ b/maven-plugin-api/pom.xml
@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven</artifactId>
-    <version>3.8.3</version>
+    <version>3.8.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-plugin-api</artifactId>
diff --git a/maven-repository-metadata/pom.xml b/maven-repository-metadata/pom.xml
index 4b4cc2b8899..0c9e5318dc6 100644
--- a/maven-repository-metadata/pom.xml
+++ b/maven-repository-metadata/pom.xml
@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven</artifactId>
-    <version>3.8.3</version>
+    <version>3.8.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-repository-metadata</artifactId>
diff --git a/maven-resolver-provider/pom.xml b/maven-resolver-provider/pom.xml
index 52e94e5c3c7..f941dd0e357 100644
--- a/maven-resolver-provider/pom.xml
+++ b/maven-resolver-provider/pom.xml
@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven</artifactId>
-    <version>3.8.3</version>
+    <version>3.8.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-resolver-provider</artifactId>
diff --git a/maven-settings-builder/pom.xml b/maven-settings-builder/pom.xml
index 677c13999c0..2ffbd9457d8 100644
--- a/maven-settings-builder/pom.xml
+++ b/maven-settings-builder/pom.xml
@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven</artifactId>
-    <version>3.8.3</version>
+    <version>3.8.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-settings-builder</artifactId>
diff --git a/maven-settings/pom.xml b/maven-settings/pom.xml
index b77437c27c9..c585d573387 100644
--- a/maven-settings/pom.xml
+++ b/maven-settings/pom.xml
@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven</artifactId>
-    <version>3.8.3</version>
+    <version>3.8.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-settings</artifactId>
diff --git a/maven-slf4j-provider/pom.xml b/maven-slf4j-provider/pom.xml
index eea89b72de1..e63956fcf35 100644
--- a/maven-slf4j-provider/pom.xml
+++ b/maven-slf4j-provider/pom.xml
@@ -25,7 +25,7 @@ under the License.
   <parent>
     <groupId>org.apache.maven</groupId>
     <artifactId>maven</artifactId>
-    <version>3.8.3</version>
+    <version>3.8.4-SNAPSHOT</version>
   </parent>
 
   <artifactId>maven-slf4j-provider</artifactId>
diff --git a/pom.xml b/pom.xml
index f584a2e60d5..a5848644d56 100644
--- a/pom.xml
+++ b/pom.xml
@@ -30,7 +30,7 @@ under the License.
   </parent>
 
   <artifactId>maven</artifactId>
-  <version>3.8.3</version>
+  <version>3.8.4-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <name>Apache Maven</name>
@@ -77,7 +77,7 @@ under the License.
     <maven.site.path>ref/3-LATEST</maven.site.path>
     <checkstyle.violation.ignore>None</checkstyle.violation.ignore>
     <checkstyle.excludes>**/package-info.java</checkstyle.excludes>
-    <project.build.outputTimestamp>2021-09-27T18:25:22Z</project.build.outputTimestamp>
+    <project.build.outputTimestamp>2021-09-27T18:28:35Z</project.build.outputTimestamp>
   </properties>
 
   <modules>