diff --git a/src/renderer/components/version-viewer/slides/mods/mod-item.component.tsx b/src/renderer/components/version-viewer/slides/mods/mod-item.component.tsx
index 919e9e73..81c07086 100644
--- a/src/renderer/components/version-viewer/slides/mods/mod-item.component.tsx
+++ b/src/renderer/components/version-viewer/slides/mods/mod-item.component.tsx
@@ -23,8 +23,8 @@ type Props = {
 };
 
 type FileSizeProps = {
-    fileSize?: number;
-    wantInfoStyle: CSSProperties;
+    readonly fileSize?: number;
+    readonly wantInfoStyle: CSSProperties;
 };
 
 function FileSizeText({ fileSize, wantInfoStyle }: FileSizeProps) {