diff --git a/pom.xml b/pom.xml
index 8926a20..8ea9bb5 100644
--- a/pom.xml
+++ b/pom.xml
@@ -73,6 +73,14 @@
 				<groupId>org.antlr</groupId>
 				<artifactId>antlr4-maven-plugin</artifactId>
 				<version>${antlr.version}</version>
+				<executions>
+					<execution>
+						<phase>generate-sources</phase>
+						<goals>
+							<goal>antlr4</goal>
+						</goals>
+					</execution>
+				</executions>
 			</plugin>
     </plugins>
 	</build>