diff --git a/TomcatGrailsPlugin.groovy b/TomcatGrailsPlugin.groovy
index af20a5d..6b5c13e 100644
--- a/TomcatGrailsPlugin.groovy
+++ b/TomcatGrailsPlugin.groovy
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 class TomcatGrailsPlugin {
-	def version = '9.0.0.M1'
+	def version = '9.0.0.M4'
 	def grailsVersion = '2.3 > *'
 	def scopes = [excludes: 'war']
 	def title = 'Apache Tomcat plugin'