diff --git a/build.gradle b/build.gradle
index e2e8194aa..afed6b60f 100644
--- a/build.gradle
+++ b/build.gradle
@@ -529,7 +529,14 @@ launch4j {
 
 spotless {
     java {
-        target '*.java', 'app/**/*.java'
+        target sourceSets.main.allJava
+        target sourceSets.test.allJava
+        target project(':common').sourceSets.main.allJava
+        target project(':common').sourceSets.test.allJava
+        target project(':proprietary').sourceSets.main.allJava
+        target project(':proprietary').sourceSets.test.allJava
+        target project(':stirling-pdf').sourceSets.main.allJava
+        target project(':stirling-pdf').sourceSets.test.allJava
 
         googleJavaFormat(googleJavaFormatVersion).aosp().reorderImports(false)