diff --git a/build.gradle b/build.gradle
index 8e4a292..0e21ffc 100644
--- a/build.gradle
+++ b/build.gradle
@@ -22,9 +22,9 @@ repositories {
 dependencies {
 	annotationProcessor 'org.openjdk.jmh:jmh-generator-annprocess:1.36'
 	implementation 'org.openjdk.jmh:jmh-core:1.36'
-	implementation 'io.sf.carte:xml-dtd:4.2'
-	implementation 'io.sf.carte:css4j:4.1'
-	implementation(group: 'io.sf.carte', name: 'css4j', version: '4.1', classifier: 'tests')
+	implementation 'io.sf.carte:xml-dtd:4.2.1'
+	implementation 'io.sf.carte:css4j:4.2.1'
+	implementation(group: 'io.sf.carte', name: 'css4j', version: '4.2.1', classifier: 'tests')
 	implementation 'io.sf.carte:css4j-dom4j:4.0'
 	implementation 'nu.validator:htmlparser:1.4.16'
 	implementation 'org.jsoup:jsoup:1.16.1'
diff --git a/pom.xml b/pom.xml
index 83c1a52..c7cba74 100644
--- a/pom.xml
+++ b/pom.xml
@@ -23,7 +23,7 @@
 		 <dependency>
 			<groupId>io.sf.carte</groupId>
 			<artifactId>xml-dtd</artifactId>
-			<version>4.2</version>
+			<version>4.2.1</version>
 			<type>jar</type>
 			<scope>compile</scope>
 		</dependency>
@@ -73,7 +73,7 @@
 		<!--
 			CSS4J version to use with this project.
 		  -->
-		<css4j.version>4.1</css4j.version>
+		<css4j.version>4.2.1</css4j.version>
 
 		<!--
 			JMH version to use with this project.