diff --git a/src/converters/libreoffice.ts b/src/converters/libreoffice.ts
index 757d19f..54079b3 100644
--- a/src/converters/libreoffice.ts
+++ b/src/converters/libreoffice.ts
@@ -55,7 +55,7 @@ export const properties = {
       "ots",
       "sxc",
       "stc",
-      "sylk",
+      "slk",
       "tab",
       "tsv",
       "xls",
@@ -154,7 +154,7 @@ const inputFilters: Record<FileCategories, Record<string, string>> = {
     ots: "calc8_template",
     sxc: "StarOffice XML (Calc)",
     stc: "calc_StarOffice_XML_Calc_Template",
-    sylk: "SYLK",
+    slk: "SYLK",
     tab: "Text - txt - csv (StarCalc)",
     tsv: "Text - txt - csv (StarCalc)",
     xls: "MS Excel 97",