diff --git a/image-previewer.js b/image-previewer.js
index 7967573..f0920fb 100644
--- a/image-previewer.js
+++ b/image-previewer.js
@@ -50,7 +50,7 @@ Hooks.on('renderFilePicker', (app, html, data) => {
         // get the proper image path
         let path = ev.target.dataset.path;
         let fileExtension = path.split('.')[path.split('.').length - 1].toLowerCase();
-        if (CONST.IMAGE_FILE_EXTENSIONS.includes(fileExtension)) {
+        if (fileExtension in CONST.IMAGE_FILE_EXTENSIONS) {
             imagePreviewer.showPreview(path, previewPos);
         }
     }, ev => {
diff --git a/module.json b/module.json
index 0dd62f3..bd0eab3 100644
--- a/module.json
+++ b/module.json
@@ -2,7 +2,7 @@
     "name": "image-previewer",
     "title": "Image Previewer",
     "description": "A little app to preview images on hover in the file picker menu.",
-    "version": "0.7",
+    "version": "0.8",
     "author": "Felix#6196",
     "scripts": ["./image-previewer.js"],
     "styles": ["./image-previewer.css"],
@@ -10,6 +10,6 @@
     "url": "https://github.com/syl3r86/image-previewer",
     "manifest": "https://raw.githubusercontent.com/syl3r86/image-previewer/master/module.json",
     "download": "https://github.com/syl3r86/image-previewer/archive/master.zip",
-    "minimumCoreVersion": "0.5.5",
-    "compatibleCoreVersion": "0.5.5"
+    "minimumCoreVersion": "9",
+    "compatibleCoreVersion": "9"
 }