diff --git a/web/src/beta/lib/core/engines/Cesium/core/presets.ts b/web/src/beta/lib/core/engines/Cesium/core/presets.ts
index aa8cecd41e..dd8b0970c5 100644
--- a/web/src/beta/lib/core/engines/Cesium/core/presets.ts
+++ b/web/src/beta/lib/core/engines/Cesium/core/presets.ts
@@ -27,6 +27,7 @@ export const tiles = {
     new OpenStreetMapImageryProvider({
       url: "https://stamen-tiles.a.ssl.fastly.net/watercolor/",
       credit: "Map tiles by Stamen Design, under CC BY 3.0. Data by OpenStreetMap, under CC BY SA.",
+      fileExtension: "jpg",
     }),
   stamen_toner: () =>
     new OpenStreetMapImageryProvider({
diff --git a/web/src/classic/components/molecules/Visualizer/Engine/Cesium/core/presets.ts b/web/src/classic/components/molecules/Visualizer/Engine/Cesium/core/presets.ts
index aa8cecd41e..dd8b0970c5 100644
--- a/web/src/classic/components/molecules/Visualizer/Engine/Cesium/core/presets.ts
+++ b/web/src/classic/components/molecules/Visualizer/Engine/Cesium/core/presets.ts
@@ -27,6 +27,7 @@ export const tiles = {
     new OpenStreetMapImageryProvider({
       url: "https://stamen-tiles.a.ssl.fastly.net/watercolor/",
       credit: "Map tiles by Stamen Design, under CC BY 3.0. Data by OpenStreetMap, under CC BY SA.",
+      fileExtension: "jpg",
     }),
   stamen_toner: () =>
     new OpenStreetMapImageryProvider({
diff --git a/web/src/classic/core/engines/Cesium/core/presets.ts b/web/src/classic/core/engines/Cesium/core/presets.ts
index aa8cecd41e..dd8b0970c5 100644
--- a/web/src/classic/core/engines/Cesium/core/presets.ts
+++ b/web/src/classic/core/engines/Cesium/core/presets.ts
@@ -27,6 +27,7 @@ export const tiles = {
     new OpenStreetMapImageryProvider({
       url: "https://stamen-tiles.a.ssl.fastly.net/watercolor/",
       credit: "Map tiles by Stamen Design, under CC BY 3.0. Data by OpenStreetMap, under CC BY SA.",
+      fileExtension: "jpg",
     }),
   stamen_toner: () =>
     new OpenStreetMapImageryProvider({