diff --git a/README-CHANGES.xml b/README-CHANGES.xml
index 0be6b55..f8a40c8 100644
--- a/README-CHANGES.xml
+++ b/README-CHANGES.xml
@@ -503,7 +503,7 @@
         <c:change date="2024-03-29T00:00:00+00:00" summary="Allow JDK [21,23)."/>
       </c:changes>
     </c:release>
-    <c:release date="2024-10-17T21:35:57+00:00" is-open="false" ticket-system="com.github.io7m.primogenitor" version="8.3.0">
+    <c:release date="2024-10-17T00:00:00+00:00" is-open="false" ticket-system="com.github.io7m.primogenitor" version="8.3.0">
       <c:changes>
         <c:change date="2024-04-19T00:00:00+00:00" summary="Update org.cyclonedx:cyclonedx-maven-plugin:2.7.10 → 2.8.0."/>
         <c:change date="2024-04-19T00:00:00+00:00" summary="Update junit.version:5.10.1 → 5.10.2."/>
@@ -580,6 +580,9 @@
         <c:change date="2024-10-17T00:00:00+00:00" summary="Update org.apache.maven.plugins:maven-dependency-plugin:3.6.1 → 3.7.1"/>
       </c:changes>
     </c:release>
+    <c:release date="2024-10-17T21:49:10+00:00" is-open="true" ticket-system="com.github.io7m.primogenitor" version="8.4.0">
+      <c:changes/>
+    </c:release>
   </c:releases>
   <c:ticket-systems>
     <c:ticket-system default="false" id="com.github.io7m.primogenitor" url="https://www.github.com/io7m-com/primogenitor/issues/"/>
diff --git a/com.io7m.primogenitor.full/pom.xml b/com.io7m.primogenitor.full/pom.xml
index 29d46dd..08423c5 100644
--- a/com.io7m.primogenitor.full/pom.xml
+++ b/com.io7m.primogenitor.full/pom.xml
@@ -8,7 +8,7 @@
   <parent>
     <artifactId>com.io7m.primogenitor</artifactId>
     <groupId>com.io7m.primogenitor</groupId>
-    <version>8.3.0</version>
+    <version>8.4.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>com.io7m.primogenitor.full</artifactId>
diff --git a/com.io7m.primogenitor.lite/pom.xml b/com.io7m.primogenitor.lite/pom.xml
index 4b34dfc..5c6c8c4 100644
--- a/com.io7m.primogenitor.lite/pom.xml
+++ b/com.io7m.primogenitor.lite/pom.xml
@@ -8,7 +8,7 @@
   <parent>
     <artifactId>com.io7m.primogenitor</artifactId>
     <groupId>com.io7m.primogenitor</groupId>
-    <version>8.3.0</version>
+    <version>8.4.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>com.io7m.primogenitor.lite</artifactId>
diff --git a/com.io7m.primogenitor.support/pom.xml b/com.io7m.primogenitor.support/pom.xml
index 188d5f7..a079efd 100644
--- a/com.io7m.primogenitor.support/pom.xml
+++ b/com.io7m.primogenitor.support/pom.xml
@@ -8,7 +8,7 @@
   <parent>
     <artifactId>com.io7m.primogenitor</artifactId>
     <groupId>com.io7m.primogenitor</groupId>
-    <version>8.3.0</version>
+    <version>8.4.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>com.io7m.primogenitor.support</artifactId>
diff --git a/com.io7m.primogenitor.tests/pom.xml b/com.io7m.primogenitor.tests/pom.xml
index aa39b81..ac6fcd0 100644
--- a/com.io7m.primogenitor.tests/pom.xml
+++ b/com.io7m.primogenitor.tests/pom.xml
@@ -9,7 +9,7 @@
   <parent>
     <artifactId>com.io7m.primogenitor</artifactId>
     <groupId>com.io7m.primogenitor</groupId>
-    <version>8.3.0</version>
+    <version>8.4.0-SNAPSHOT</version>
   </parent>
 
   <artifactId>com.io7m.primogenitor.tests</artifactId>
diff --git a/pom.xml b/pom.xml
index 3c4eca8..e643ef7 100644
--- a/pom.xml
+++ b/pom.xml
@@ -9,7 +9,7 @@
   <modelVersion>4.0.0</modelVersion>
   <groupId>com.io7m.primogenitor</groupId>
   <artifactId>com.io7m.primogenitor</artifactId>
-  <version>8.3.0</version>
+  <version>8.4.0-SNAPSHOT</version>
   <packaging>pom</packaging>
 
   <modules>
@@ -61,7 +61,7 @@
     <io7m.javadoc.docLint>-Xdoclint:all</io7m.javadoc.docLint>
 
     <!-- The timestamp used for all outputs, for reproducibility. -->
-    <project.build.outputTimestamp>2024-10-17T21:33:08Z</project.build.outputTimestamp>
+    <project.build.outputTimestamp>2024-10-17T21:49:01Z</project.build.outputTimestamp>
 
     <!-- The versions of all plugins used -->
     <io7m.bnd-baseline-maven-plugin.version>7.0.0</io7m.bnd-baseline-maven-plugin.version>