diff --git a/toml/_toml.py b/toml/_toml.py
index 9b400fa..0b53cc4 100644
--- a/toml/_toml.py
+++ b/toml/_toml.py
@@ -666,7 +666,12 @@ def dump_table(buffer: StringIO, table: dict, key_parts: list[str]) -> StringIO:
                 key_parts.pop()
 
             else:
-                value_repr = repr(value) if isinstance(value, str) else value
+                if isinstance(value, str):
+                    value_repr = f'"{value}"'
+                elif isinstance(value, bool):
+                    value_repr = "true" if value else "false"
+                else:
+                    value_repr = value
 
                 buffer.write(f"{key_repr} = {value_repr}\n")