diff --git a/scripts/_index.mjs b/scripts/_index.mjs
index c8e5840..d52fa99 100644
--- a/scripts/_index.mjs
+++ b/scripts/_index.mjs
@@ -16,7 +16,7 @@ Hooks.once("init", () => {
             CONFIG.Canvas.darknessSourceClass = PointDarknessSourceMixin(CONFIG.Canvas.darknessSourceClass);
             CONFIG.Canvas.soundSourceClass = PointSoundSourceMixin(CONFIG.Canvas.soundSourceClass);
 
-            if (game.release.version >= 13) {
+            if (game.release.generation >= 13) {
                 if (game.modules.get("lib-wrapper")?.active) {
                     libWrapper.register(
                         "limits",
@@ -83,7 +83,7 @@ Hooks.once("init", () => {
 });
 
 Hooks.once("ready", () => {
-    if (game.release.version < 13) {
+    if (game.release.generation < 13) {
         CONFIG.RegionBehavior.sheetClasses[TYPE]["core.RegionBehaviorConfig"].cls = LimitRangeRegionBehaviorConfig;
     }
 });
diff --git a/scripts/canvas/geometry/constraint.mjs b/scripts/canvas/geometry/constraint.mjs
index 97d54bf..0941800 100644
--- a/scripts/canvas/geometry/constraint.mjs
+++ b/scripts/canvas/geometry/constraint.mjs
@@ -54,7 +54,7 @@ export default class PointSourcePolygonConstraint extends PIXI.Polygon {
 
         let { x: originX, y: originY, elevation } = this.#origin = polygon.origin;
 
-        if (game.release.version < 13) {
+        if (game.release.generation < 13) {
             elevation = polygon.config.source?.elevation ?? 0.0;
         }
 
diff --git a/scripts/canvas/sources/darkness.mjs b/scripts/canvas/sources/darkness.mjs
index 956b22b..225f2ab 100644
--- a/scripts/canvas/sources/darkness.mjs
+++ b/scripts/canvas/sources/darkness.mjs
@@ -29,7 +29,7 @@ export const PointDarknessSourceMixin = (PointDarknessSource) => class extends P
             PointSourcePolygonConstraint.apply(this.shape, Limits.darkness);
         }
 
-        if (game.release.version >= 13) {
+        if (game.release.generation >= 13) {
             const { x, y, elevation, radius } = this.data;
             const z = elevation * canvas.dimensions.distancePixels;
             const { left: minX, right: maxX, top: minY, bottom: maxY } = this.shape.bounds;
diff --git a/scripts/canvas/sources/light.mjs b/scripts/canvas/sources/light.mjs
index 61d3e56..39b2510 100644
--- a/scripts/canvas/sources/light.mjs
+++ b/scripts/canvas/sources/light.mjs
@@ -19,7 +19,7 @@ export const PointLightSourceMixin = (PointLightSource) => class extends PointLi
 
         PointSourcePolygonConstraint.apply(this.shape, Limits.light);
 
-        if (game.release.version >= 13) {
+        if (game.release.generation >= 13) {
             const { x, y, elevation, radius } = this.data;
             const z = elevation * canvas.dimensions.distancePixels;
             const { left: minX, right: maxX, top: minY, bottom: maxY } = this.shape.bounds;
diff --git a/scripts/canvas/sources/sound.mjs b/scripts/canvas/sources/sound.mjs
index 0282ee9..f5eff44 100644
--- a/scripts/canvas/sources/sound.mjs
+++ b/scripts/canvas/sources/sound.mjs
@@ -26,7 +26,7 @@ export const PointSoundSourceMixin = (PointSoundSource) => class extends PointSo
         let minZ;
         let maxZ;
 
-        if (game.release.version >= 13) {
+        if (game.release.generation >= 13) {
             minZ = z - radius;
             maxZ = z + radius;
         } else {
@@ -51,7 +51,7 @@ export const PointSoundSourceMixin = (PointSoundSource) => class extends PointSo
         if (volume > 0.0) {
             let z;
 
-            if (game.release.version >= 13) {
+            if (game.release.generation >= 13) {
                 z = listener.elevation * canvas.dimensions.distancePixels;
             } else {
                 z = this.#caster.ray.originZ;
diff --git a/scripts/canvas/sources/vision.mjs b/scripts/canvas/sources/vision.mjs
index 1b2199b..3d70aff 100644
--- a/scripts/canvas/sources/vision.mjs
+++ b/scripts/canvas/sources/vision.mjs
@@ -81,7 +81,7 @@ export const PointVisionSourceMixin = (PointVisionSource) => class extends Point
             let minZ;
             let maxZ;
 
-            if (game.release.version >= 13) {
+            if (game.release.generation >= 13) {
                 minZ = z - radius;
                 maxZ = z + radius;
             } else {
diff --git a/scripts/limits.mjs b/scripts/limits.mjs
index 0ed9e44..8b79ace 100644
--- a/scripts/limits.mjs
+++ b/scripts/limits.mjs
@@ -140,7 +140,7 @@ export default class Limits {
             let bottom;
             let top;
 
-            if (game.release.version >= 13) {
+            if (game.release.generation >= 13) {
                 if (!shape) {
                     polygons = region.polygons;
                 }