add enc2utf8 to solve unicode issue
diff --git a/R/add_footnote.R b/R/add_footnote.R
index 3e1b130..abb618a 100644
--- a/R/add_footnote.R
+++ b/R/add_footnote.R
@@ -99,6 +99,7 @@
     label <- escape_latex(label)
     label <- gsub("\\\\", "\\\\\\\\", label)
 
+    export <- enc2utf8(export)
     table_info <- magic_mirror(input)
     if (table_info$tabular == "longtable") {
       if (notation != "number") {