diff --git a/tools/font-metrics/build.gradle b/tools/font-metrics/build.gradle
index 9707ba65..ef003e9c 100644
--- a/tools/font-metrics/build.gradle
+++ b/tools/font-metrics/build.gradle
@@ -1 +1 @@
-application.mainClassName = 'com.riiablo.FontMetricsTool'
+application.mainClass = 'com.riiablo.FontMetricsTool'
diff --git a/tools/map-viewer/build.gradle b/tools/map-viewer/build.gradle
index 89449ca0..0c54f59f 100644
--- a/tools/map-viewer/build.gradle
+++ b/tools/map-viewer/build.gradle
@@ -1 +1 @@
-application.mainClassName = 'com.riiablo.map.MapViewer'
+application.mainClass = 'com.riiablo.map.MapViewer'