diff --git a/src/core/file.ts b/src/core/file.ts
index 51401e67..ffab3ea0 100644
--- a/src/core/file.ts
+++ b/src/core/file.ts
@@ -4,7 +4,7 @@ export class KnownFileType {
     public static readonly JSON = new KnownFileType('json', 'application/json');
     public static readonly CSV = new KnownFileType('csv', 'text/csv');
     public static readonly TSV = new KnownFileType('tsv', 'text/tab-separated-values');
-    public static readonly TXT = new KnownFileType('txt', 'text/text');
+    public static readonly TXT = new KnownFileType('txt', 'text/plain');
     public static readonly MARKDOWN = new KnownFileType('md', 'text/markdown');
     public static readonly JS = new KnownFileType('js', 'application/javascript');
     public static readonly JPG = new KnownFileType('jpg', 'image/jpeg');