diff --git a/pom.xml b/pom.xml
index b38ced1..750a8fe 100644
--- a/pom.xml
+++ b/pom.xml
@@ -24,7 +24,7 @@
 		<slf4j.version>1.7.25</slf4j.version>
 		<junit.version>4.12</junit.version>
 		<assertj.version>3.11.1</assertj.version>
-		<spotless.version>1.17.0</spotless.version>
+		<spotless.version>1.18.0</spotless.version>
 	</properties>
 
 	<dependencies>
@@ -110,6 +110,17 @@
 							<file>${maven.multiModuleProjectDirectory}/format.importorder</file>
 						</importOrder>
 					</java>
+
+					<antlr4>
+						<includes>
+							<include>src/main/antlr4/**/*.g4</include>
+							<include>src/test/antlr4/**/*.g4</include>
+						</includes>
+
+						<antlr4Formatter>
+							<version>1.1.0</version>
+						</antlr4Formatter>
+					</antlr4>
 				</configuration>
 			</plugin>
 		</plugins>
@@ -211,4 +222,4 @@
 		<url>scm:git:https://github.com/teverett/Antlr4Formatter.git</url>
 	</scm>
 
-</project>
\ No newline at end of file
+</project>