diff --git a/src/main/java/io/codearte/accurest/maven/GenerateSpecsMojo.java b/src/main/java/io/codearte/accurest/maven/GenerateSpecsMojo.java
index 4d68e341d9..54052809db 100644
--- a/src/main/java/io/codearte/accurest/maven/GenerateSpecsMojo.java
+++ b/src/main/java/io/codearte/accurest/maven/GenerateSpecsMojo.java
@@ -24,15 +24,18 @@ public class GenerateSpecsMojo extends AbstractMojo {
 	@Parameter(defaultValue = "${project.build.directory}")
 	private File projectBuildDirectory;
 
-	@Parameter(property = "contractsDir", defaultValue = "/src/test/resources/stubs", required = false)
+	@Parameter(property = "contractsDir", defaultValue = "/src/test/resources/stubs")
 	private String contractsDir;
 
-	@Parameter(property = "generatedTestSourcesDir", defaultValue = "/generated-sources/accurest", required = false)
+	@Parameter(property = "generatedTestSourcesDir", defaultValue = "/generated-sources/accurest")
 	private String generatedTestSourcesDir;
 
-	@Parameter(property = "basePackageForTests", defaultValue = "io.codearte.accurest.tests", required = false)
+	@Parameter(property = "basePackageForTests", defaultValue = "io.codearte.accurest.tests")
 	private String basePackageForTests;
 
+	public GenerateSpecsMojo() {
+	}
+
 	public void execute() throws MojoExecutionException, MojoFailureException {
 		AccurestConfigProperties config = new AccurestConfigProperties();
 
diff --git a/src/main/java/io/codearte/accurest/maven/GenerateStubsMojo.java b/src/main/java/io/codearte/accurest/maven/GenerateStubsMojo.java
index 852cc64f91..3cfd8e82cc 100644
--- a/src/main/java/io/codearte/accurest/maven/GenerateStubsMojo.java
+++ b/src/main/java/io/codearte/accurest/maven/GenerateStubsMojo.java
@@ -22,10 +22,10 @@ public class GenerateStubsMojo extends AbstractMojo {
 	@Parameter(defaultValue = "${project.build.directory}")
 	private File projectBuildDirectory;
 
-	@Parameter(property = "mappingsDir", defaultValue = "mappings", required = false)
+	@Parameter(property = "mappingsDir", defaultValue = "mappings")
 	private String mappingsDir;
 
-	@Parameter(property = "contractsDir", defaultValue = "/src/test/resources/stubs", required = false)
+	@Parameter(property = "contractsDir", defaultValue = "/src/test/resources/stubs")
 	private String contractsDir;
 
 	public void execute() throws MojoExecutionException, MojoFailureException {