diff --git a/README-CHANGES.xml b/README-CHANGES.xml
index 450672f..4e4aa83 100644
--- a/README-CHANGES.xml
+++ b/README-CHANGES.xml
@@ -99,9 +99,19 @@
         <c:change date="2022-11-13T00:00:00+00:00" summary="Add a Maven plugin to avoid classpath pollution during Maven builds."/>
       </c:changes>
     </c:release>
-    <c:release date="2024-05-05T19:16:56+00:00" is-open="true" ticket-system="com.github.io7m.xstructural" version="1.8.1">
+    <c:release date="2024-05-08T21:27:15+00:00" is-open="true" ticket-system="com.github.io7m.xstructural" version="1.8.1">
       <c:changes>
-        <c:change date="2024-05-05T19:16:56+00:00" summary="Update org.apache.commons:commons-compress 1.25.0 → 1.26.1."/>
+        <c:change date="2024-05-05T00:00:00+00:00" summary="Update org.apache.commons:commons-compress 1.25.0 → 1.26.1."/>
+        <c:change date="2024-05-08T00:00:00+00:00" summary="Update ch.qos.logback:logback-classic:1.4.14 → 1.5.6"/>
+        <c:change date="2024-05-08T00:00:00+00:00" summary="Update org.slf4j:slf4j-api:2.0.10 → 2.0.13"/>
+        <c:change date="2024-05-08T00:00:00+00:00" summary="Update com.io7m.junreachable:com.io7m.junreachable.core:4.0.0 → 4.0.2"/>
+        <c:change date="2024-05-08T00:00:00+00:00" summary="Update com.github.marschall:memoryfilesystem:2.7.0 → 2.8.0"/>
+        <c:change date="2024-05-08T00:00:00+00:00" summary="Update commons-io:commons-io:2.15.1 → 2.16.1"/>
+        <c:change date="2024-05-08T00:00:00+00:00" summary="Update org.apache.tika:tika-core:2.9.1 → 2.9.2"/>
+        <c:change date="2024-05-08T00:00:00+00:00" summary="Update org.apache.maven.plugin-tools:maven-plugin-annotations:3.10.2 → 3.13.0"/>
+        <c:change date="2024-05-08T00:00:00+00:00" summary="Update org.immutables:value:2.10.0 → 2.10.1"/>
+        <c:change date="2024-05-08T00:00:00+00:00" summary="Update org.junit.jupiter:junit-jupiter-api:5.10.1 → 5.10.2"/>
+        <c:change date="2024-05-08T21:27:15+00:00" summary="Update org.junit.jupiter:junit-jupiter-engine:5.10.1 → 5.10.2"/>
       </c:changes>
     </c:release>
   </c:releases>
diff --git a/pom.xml b/pom.xml
index 4074aa6..020c23a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -34,9 +34,9 @@
     <io7m.java.targetJavaVersion>17</io7m.java.targetJavaVersion>
 
     <!-- Third-party dependencies. -->
-    <com.io7m.immutables.version>2.10.0</com.io7m.immutables.version>
+    <com.io7m.immutables.version>2.10.1</com.io7m.immutables.version>
     <io7m.maven-api.version>3.9.6</io7m.maven-api.version>
-    <junit.version>5.10.1</junit.version>
+    <junit.version>5.10.2</junit.version>
   </properties>
 
   <licenses>
@@ -117,7 +117,7 @@
       <dependency>
         <groupId>ch.qos.logback</groupId>
         <artifactId>logback-classic</artifactId>
-        <version>1.4.14</version>
+        <version>1.5.6</version>
       </dependency>
       <dependency>
         <groupId>net.sf.saxon</groupId>
@@ -127,7 +127,7 @@
       <dependency>
         <groupId>org.slf4j</groupId>
         <artifactId>slf4j-api</artifactId>
-        <version>2.0.10</version>
+        <version>2.0.13</version>
       </dependency>
       <dependency>
         <groupId>org.junit.jupiter</groupId>
@@ -142,7 +142,7 @@
       <dependency>
         <groupId>com.io7m.junreachable</groupId>
         <artifactId>com.io7m.junreachable.core</artifactId>
-        <version>4.0.0</version>
+        <version>4.0.2</version>
       </dependency>
       <dependency>
         <groupId>com.beust</groupId>
@@ -157,7 +157,7 @@
       <dependency>
         <groupId>com.github.marschall</groupId>
         <artifactId>memoryfilesystem</artifactId>
-        <version>2.7.0</version>
+        <version>2.8.0</version>
       </dependency>
       <dependency>
         <groupId>org.apache.commons</groupId>
@@ -167,7 +167,7 @@
       <dependency>
         <groupId>commons-io</groupId>
         <artifactId>commons-io</artifactId>
-        <version>2.15.1</version>
+        <version>2.16.1</version>
       </dependency>
       <dependency>
         <groupId>org.w3c</groupId>
@@ -203,7 +203,7 @@
       <dependency>
         <groupId>org.apache.tika</groupId>
         <artifactId>tika-core</artifactId>
-        <version>2.9.1</version>
+        <version>2.9.2</version>
       </dependency>
       <dependency>
         <groupId>xml-apis</groupId>
@@ -223,7 +223,7 @@
       <dependency>
         <groupId>org.apache.maven.plugin-tools</groupId>
         <artifactId>maven-plugin-annotations</artifactId>
-        <version>3.10.2</version>
+        <version>3.13.0</version>
         <scope>provided</scope>
       </dependency>
       <dependency>