diff --git a/static/admin/prefixed-image-widget.js b/static/admin/prefixed-image-widget.js
index 0f7d15b..0165be6 100644
--- a/static/admin/prefixed-image-widget.js
+++ b/static/admin/prefixed-image-widget.js
@@ -1,47 +1,55 @@
-class PrefixedImageControl extends React.Component {
-  openMediaLibrary = () => {
-    this.props.mediaLibrary.open({
-      allowMultiple: false,
-      config: { allowMultiple: false },
-      controlID: this.props.forID,
-      value: this.props.value,
-      field: this.props.field,
-      onInsert: (files) => {
-        if (!files || files.length === 0) return;
-        const file = files[0];
-        const prefix = "feature-";
-        // If already prefixed, don't double-prefix
-        const fileName = file.name.startsWith(prefix) ? file.name : prefix + file.name;
-        const newFile = new File([file], fileName, { type: file.type });
-        this.props.mediaLibrary.persistMedia(newFile).then((uploaded) => {
-          this.props.onChange(uploaded.public_path || uploaded.url);
-        });
-      },
-    });
+(function waitForCMSAndReact() {
+  if (!(window.CMS && window.React)) {
+    setTimeout(waitForCMSAndReact, 50);
+    return;
+  }
+  const React = window.React;
+
+  class PrefixedImageControl extends React.Component {
+    openMediaLibrary = () => {
+      this.props.mediaLibrary.open({
+        allowMultiple: false,
+        config: { allowMultiple: false },
+        controlID: this.props.forID,
+        value: this.props.value,
+        field: this.props.field,
+        onInsert: (files) => {
+          if (!files || files.length === 0) return;
+          const file = files[0];
+          const prefix = "feature-";
+          // If already prefixed, don't double-prefix
+          const fileName = file.name.startsWith(prefix) ? file.name : prefix + file.name;
+          const newFile = new File([file], fileName, { type: file.type });
+          this.props.mediaLibrary.persistMedia(newFile).then((uploaded) => {
+            this.props.onChange(uploaded.public_path || uploaded.url);
+          });
+        },
+      });
+    };
+
+    render() {
+      const value = this.props.value || "";
+      return (
+        React.createElement("div", null,
+          React.createElement("button", { type: "button", onClick: this.openMediaLibrary },
+            value ? "Change Image" : "Add Image"
+          ),
+          value && React.createElement("img", { src: value, alt: "", style: { maxWidth: "200px", display: "block", marginTop: "1em" } })
+        )
+      );
+    }
+  }
+
+  const PrefixedImageWidget = {
+    name: "prefixed-image",
+    controlComponent: PrefixedImageControl,
+    previewComponent: ({ value }) =>
+      value ? React.createElement("img", { src: value, alt: "", style: { maxWidth: "200px" } }) : null,
   };
 
-  render() {
-    const value = this.props.value || "";
-    return (
-      React.createElement("div", null,
-        React.createElement("button", { type: "button", onClick: this.openMediaLibrary },
-          value ? "Change Image" : "Add Image"
-        ),
-        value && React.createElement("img", { src: value, alt: "", style: { maxWidth: "200px", display: "block", marginTop: "1em" } })
-      )
-    );
-  }
-}
-
-const PrefixedImageWidget = {
-  name: "prefixed-image",
-  controlComponent: PrefixedImageControl,
-  previewComponent: ({ value }) =>
-    value ? React.createElement("img", { src: value, alt: "", style: { maxWidth: "200px" } }) : null,
-};
-
-window.CMS.registerWidget(
-  PrefixedImageWidget.name,
-  PrefixedImageWidget.controlComponent,
-  PrefixedImageWidget.previewComponent
-);
\ No newline at end of file
+  window.CMS.registerWidget(
+    PrefixedImageWidget.name,
+    PrefixedImageWidget.controlComponent,
+    PrefixedImageWidget.previewComponent
+  );
+})();
\ No newline at end of file