diff --git a/README.md b/README.md
index d20c1f0..4829242 100644
--- a/README.md
+++ b/README.md
@@ -139,6 +139,9 @@ result = validate(data, SCHEMA)
 print(result["name"])   # ← IDE が "name" / "level" を補完してくれる
 ```
 
+注意:
+- `collect_errors=True` を指定した場合、`validate` は `ValidationResult` を返します。そのため、`Schema[T]` を使っていても戻り値の型は `T` ではなく `ValidationResult` になります。
+
 TypedDict を書くのが面倒な場合は、既存の辞書スキーマを渡す使い方もそのまま使えます。
 型補完が不要なケースでは、変数側に型注釈を書くことで mypy / pyright に型を伝えられます。
 
diff --git a/src/validkit/__init__.py b/src/validkit/__init__.py
index e3e7d40..61a5308 100644
--- a/src/validkit/__init__.py
+++ b/src/validkit/__init__.py
@@ -1,5 +1,5 @@
 from .v import v
 from .validator import validate, ValidationError, Schema
 
-__version__ = "1.1.1"
+__version__ = "1.1.0"
 __all__ = ["v", "validate", "ValidationError", "Schema"]
diff --git a/src/validkit/validator.py b/src/validkit/validator.py
index 348ad65..26d6642 100644
--- a/src/validkit/validator.py
+++ b/src/validkit/validator.py
@@ -1,4 +1,15 @@
-from typing import Any, Dict, Generic, List, Optional, TypeVar, overload, TYPE_CHECKING
+from typing import (
+    Any,
+    Dict,
+    Generic,
+    List,
+    Optional,
+    TypeVar,
+    Union,
+    overload,
+    TYPE_CHECKING,
+    Literal,
+)
 from .v import Validator, v
 
 T = TypeVar("T")
@@ -18,6 +29,7 @@ class UserDict(TypedDict):
 
         SCHEMA: Schema[UserDict] = Schema({"name": v.str(), "age": v.int()})
 
+        data: UserDict = {"name": "Alice", "age": 30}
         result = validate(data, SCHEMA)  # inferred as UserDict by the IDE
         print(result["name"])            # IDE completes "name" / "age"
     """
@@ -165,7 +177,19 @@ def validate(
         partial: bool = ...,
         base: Any = ...,
         migrate: Optional[Dict[str, Any]] = ...,
-        collect_errors: bool = ...,
+        *,
+        collect_errors: Literal[True],
+    ) -> ValidationResult: ...
+
+    @overload
+    def validate(
+        data: Any,
+        schema: Schema[T],
+        partial: bool = ...,
+        base: Any = ...,
+        migrate: Optional[Dict[str, Any]] = ...,
+        *,
+        collect_errors: Literal[False] = ...,  # default
     ) -> T: ...
 
     @overload
@@ -175,7 +199,19 @@ def validate(
         partial: bool = ...,
         base: Any = ...,
         migrate: Optional[Dict[str, Any]] = ...,
-        collect_errors: bool = ...,
+        *,
+        collect_errors: Literal[True],
+    ) -> ValidationResult: ...
+
+    @overload
+    def validate(
+        data: Any,
+        schema: Any,
+        partial: bool = ...,
+        base: Any = ...,
+        migrate: Optional[Dict[str, Any]] = ...,
+        *,
+        collect_errors: Literal[False] = ...,  # default
     ) -> Any: ...
 
 
@@ -186,7 +222,7 @@ def validate(
     base: Any = None,
     migrate: Optional[Dict[str, Any]] = None,
     collect_errors: bool = False,
-) -> Any:
+) -> Union[Any, "ValidationResult"]:
     
     # Unwrap Schema[T] to its underlying dict schema
     if isinstance(schema, Schema):