PDFBOX-4071: update rat plugin
diff --git a/pom.xml b/pom.xml
index 97f0e3d..3e05a59 100644
--- a/pom.xml
+++ b/pom.xml
@@ -349,7 +349,7 @@
 				<plugin>
 					<groupId>org.apache.rat</groupId>
 					<artifactId>apache-rat-plugin</artifactId>
-					<version>0.11</version>
+					<version>0.13</version>
 					<configuration>
 						<excludes>
 							<exclude>src/test/resources/images/*</exclude>