diff --git a/README-CHANGES.xml b/README-CHANGES.xml
index 08d6842..d898c62 100644
--- a/README-CHANGES.xml
+++ b/README-CHANGES.xml
@@ -58,11 +58,18 @@
         <c:change date="2020-04-03T00:00:00+00:00" summary="Use primogenitor 3.8.0"/>
       </c:changes>
     </c:release>
-    <c:release date="2022-04-09T12:44:57+00:00" is-open="false" ticket-system="com.github.io7m.jaffirm" version="4.0.0">
+    <c:release date="2022-04-09T00:00:00+00:00" is-open="false" ticket-system="com.github.io7m.jaffirm" version="4.0.0">
       <c:changes>
         <c:change compatible="false" date="2022-04-09T00:00:00+00:00" summary="Require JDK 17"/>
       </c:changes>
     </c:release>
+    <c:release date="2024-05-05T00:00:00+00:00" is-open="true" ticket-system="com.github.io7m.jaffirm" version="4.0.1">
+      <c:changes>
+        <c:change date="2024-04-19T20:15:44+00:00" summary="Update org.immutables:value:2.10.0 → 2.10.1."/>
+        <c:change date="2024-04-19T20:15:47+00:00" summary="Update org.junit.jupiter:junit-jupiter-api:5.10.1 → 5.10.2."/>
+        <c:change date="2024-04-19T20:15:52+00:00" summary="Update org.junit.jupiter:junit-jupiter-engine:5.10.1 → 5.10.2."/>
+      </c:changes>
+    </c:release>
   </c:releases>
   <c:ticket-systems>
     <c:ticket-system default="false" id="com.github.io7m.jaffirm" url="https://www.github.com/io7m-com/jaffirm/issues/"/>
diff --git a/com.io7m.jaffirm.core/pom.xml b/com.io7m.jaffirm.core/pom.xml
index 7a5cdc4..5e97ed9 100644
--- a/com.io7m.jaffirm.core/pom.xml
+++ b/com.io7m.jaffirm.core/pom.xml
@@ -8,7 +8,7 @@
   <parent>
     <groupId>com.io7m.jaffirm</groupId>
     <artifactId>com.io7m.jaffirm</artifactId>
-    <version>4.0.1-SNAPSHOT</version>
+    <version>4.0.1</version>
   </parent>
   <artifactId>com.io7m.jaffirm.core</artifactId>
 
diff --git a/com.io7m.jaffirm.tests/pom.xml b/com.io7m.jaffirm.tests/pom.xml
index d53cb10..58cb13d 100644
--- a/com.io7m.jaffirm.tests/pom.xml
+++ b/com.io7m.jaffirm.tests/pom.xml
@@ -8,7 +8,7 @@
   <parent>
     <groupId>com.io7m.jaffirm</groupId>
     <artifactId>com.io7m.jaffirm</artifactId>
-    <version>4.0.1-SNAPSHOT</version>
+    <version>4.0.1</version>
   </parent>
   <artifactId>com.io7m.jaffirm.tests</artifactId>
 
diff --git a/pom.xml b/pom.xml
index 47f6459..adf7fc3 100644
--- a/pom.xml
+++ b/pom.xml
@@ -14,7 +14,7 @@
 
   <groupId>com.io7m.jaffirm</groupId>
   <artifactId>com.io7m.jaffirm</artifactId>
-  <version>4.0.1-SNAPSHOT</version>
+  <version>4.0.1</version>
 
   <packaging>pom</packaging>
   <name>com.io7m.jaffirm</name>