make read-only parameter read-only
diff --git a/src/main/java/org/apache/maven/plugins/wrapper/WrapperMojo.java b/src/main/java/org/apache/maven/plugins/wrapper/WrapperMojo.java
index a9ae2ae..40b0cd6 100644
--- a/src/main/java/org/apache/maven/plugins/wrapper/WrapperMojo.java
+++ b/src/main/java/org/apache/maven/plugins/wrapper/WrapperMojo.java
@@ -95,7 +95,7 @@
private MavenSession session;
// Waiting for org.codehaus.plexus.component.configurator.converters.basic.PathConverter
- @Parameter( defaultValue = "${project.basedir}" )
+ @Parameter( defaultValue = "${project.basedir}", readonly = true, required = true )
private File basedir;
// CONSTANTS