diff --git a/lib/nimble_csv.ex b/lib/nimble_csv.ex
index d62c545..0a96347 100644
--- a/lib/nimble_csv.ex
+++ b/lib/nimble_csv.ex
@@ -114,6 +114,8 @@ defmodule NimbleCSV do
 
   @doc """
   Eagerly dumps an enumerable into iodata (a list of binaries and bytes and other lists).
+
+  Each value is converted to a string using `String.Chars.to_string/1`.
   """
   @callback dump_to_iodata(rows :: Enumerable.t()) :: iodata()
 
@@ -121,6 +123,8 @@ defmodule NimbleCSV do
   Lazily dumps from an enumerable to a stream.
 
   It returns a stream that emits each row as iodata.
+
+  Each value is converted to a string using `String.Chars.to_string/1`.
   """
   @callback dump_to_stream(rows :: Enumerable.t()) :: Enumerable.t()
 
@@ -690,7 +694,7 @@ defmodule NimbleCSV do
       end
 
       defp maybe_escape(entry, check) do
-        entry = to_string(entry)
+        entry = String.Chars.to_string(entry)
 
         case :binary.match(entry, check) do
           {_, _} ->
diff --git a/test/nimble_csv_test.exs b/test/nimble_csv_test.exs
index 862bd62..650c4f3 100644
--- a/test/nimble_csv_test.exs
+++ b/test/nimble_csv_test.exs
@@ -315,11 +315,11 @@ defmodule NimbleCSVTest do
              """
 
     assert IO.iodata_to_binary(
-             Enum.to_list(CSV.dump_to_stream([["name", "age"], ["john\ndoe", 27]]))
+             Enum.to_list(CSV.dump_to_stream([["name", "dob"], ["john\ndoe", ~D[1970-01-01]]]))
            ) == """
-           name,age\r\n\
+           name,dob\r\n\
            "john
-           doe",27\r\n\
+           doe",1970-01-01\r\n\
            """
 
     assert IO.iodata_to_binary(