diff --git a/pyproject.toml b/pyproject.toml
index b5c00f4..f993de0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,6 +18,7 @@ dependencies = [
   "rich>=14.2.0",
   "structlog>=25.5.0",
   "sulguk>=0.11.1",
+  "tomli-w>=1.2.0",
   "typer>=0.21.0",
   "watchfiles>=0.21.0",
 ]
diff --git a/src/takopi/config.py b/src/takopi/config.py
index e008435..d3c4d9d 100644
--- a/src/takopi/config.py
+++ b/src/takopi/config.py
@@ -5,6 +5,8 @@ from dataclasses import dataclass, field
 from pathlib import Path
 from typing import Any
 
+import tomli_w
+
 HOME_CONFIG_PATH = Path.home() / ".takopi" / "takopi.toml"
 
 
@@ -92,68 +94,12 @@ class ProjectsConfig:
         return tuple(self.chat_map.keys())
 
 
-def _toml_escape(value: str) -> str:
-    return value.replace("\\", "\\\\").replace('"', '\\"')
-
-
-def _format_toml_value(value: Any) -> str:
-    if isinstance(value, bool):
-        return "true" if value else "false"
-    if isinstance(value, int):
-        return str(value)
-    if isinstance(value, float):
-        return repr(value)
-    if isinstance(value, Path):
-        return f'"{_toml_escape(str(value))}"'
-    if isinstance(value, str):
-        return f'"{_toml_escape(value)}"'
-    if isinstance(value, (list, tuple)):
-        inner = ", ".join(_format_toml_value(item) for item in value)
-        return f"[{inner}]"
-    raise ConfigError(f"Unsupported config value {value!r}")
-
-
-def _table_has_scalars(table: dict[str, Any]) -> bool:
-    return any(not isinstance(value, dict) for value in table.values())
-
-
 def dump_toml(config: dict[str, Any]) -> str:
-    lines: list[str] = []
-
-    def write_kv(key: str, value: Any) -> None:
-        lines.append(f"{key} = {_format_toml_value(value)}")
-
-    def write_table(name: str, table: dict[str, Any]) -> None:
-        if lines and lines[-1] != "":
-            lines.append("")
-        lines.append(f"[{name}]")
-        for key, value in table.items():
-            if isinstance(value, dict):
-                continue
-            write_kv(key, value)
-        for key, value in table.items():
-            if isinstance(value, dict):
-                write_table(f"{name}.{key}", value)
-
-    for key, value in config.items():
-        if isinstance(value, dict):
-            continue
-        write_kv(key, value)
-
-    for key, value in config.items():
-        if not isinstance(value, dict):
-            continue
-        if _table_has_scalars(value):
-            write_table(key, value)
-            continue
-        for subkey, subvalue in value.items():
-            if isinstance(subvalue, dict):
-                write_table(f"{key}.{subkey}", subvalue)
-            else:
-                write_table(key, value)
-                break
-
-    return "\n".join(lines) + "\n"
+    try:
+        dumped = tomli_w.dumps(config)
+    except (TypeError, ValueError) as e:
+        raise ConfigError(f"Unsupported config value: {e}") from None
+    return dumped
 
 
 def write_config(config: dict[str, Any], path: Path) -> None:
diff --git a/uv.lock b/uv.lock
index 9853e1e..0b99350 100644
--- a/uv.lock
+++ b/uv.lock
@@ -581,6 +581,7 @@ dependencies = [
     { name = "rich" },
     { name = "structlog" },
     { name = "sulguk" },
+    { name = "tomli-w" },
     { name = "typer" },
     { name = "watchfiles" },
 ]
@@ -607,6 +608,7 @@ requires-dist = [
     { name = "rich", specifier = ">=14.2.0" },
     { name = "structlog", specifier = ">=25.5.0" },
     { name = "sulguk", specifier = ">=0.11.1" },
+    { name = "tomli-w", specifier = ">=1.2.0" },
     { name = "typer", specifier = ">=0.21.0" },
     { name = "watchfiles", specifier = ">=0.21.0" },
 ]
@@ -620,6 +622,15 @@ dev = [
     { name = "ty", specifier = ">=0.0.8" },
 ]
 
+[[package]]
+name = "tomli-w"
+version = "1.2.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/19/75/241269d1da26b624c0d5e110e8149093c759b7a286138f4efd61a60e75fe/tomli_w-1.2.0.tar.gz", hash = "sha256:2dd14fac5a47c27be9cd4c976af5a12d87fb1f0b4512f81d69cce3b35ae25021", size = 7184, upload-time = "2025-01-15T12:07:24.262Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/c7/18/c86eb8e0202e32dd3df50d43d7ff9854f8e0603945ff398974c1d91ac1ef/tomli_w-1.2.0-py3-none-any.whl", hash = "sha256:188306098d013b691fcadc011abd66727d3c414c571bb01b1a174ba8c983cf90", size = 6675, upload-time = "2025-01-15T12:07:22.074Z" },
+]
+
 [[package]]
 name = "tqdm"
 version = "4.67.1"