diff --git a/openapi_core/app.py b/openapi_core/app.py
index 50c73904..cd511995 100644
--- a/openapi_core/app.py
+++ b/openapi_core/app.py
@@ -89,9 +89,9 @@ def __init__(
 
     @classmethod
     def from_dict(
-        cls, data: Schema, config: Optional[Config] = None
+        cls, data: Schema, config: Optional[Config] = None, base_uri: str = ""
     ) -> "OpenAPI":
-        sp = SchemaPath.from_dict(data)
+        sp = SchemaPath.from_dict(data, base_uri=base_uri)
         return cls(sp, config=config)
 
     @classmethod
@@ -110,9 +110,12 @@ def from_file_path(
 
     @classmethod
     def from_file(
-        cls, fileobj: SupportsRead, config: Optional[Config] = None
+        cls,
+        fileobj: SupportsRead,
+        config: Optional[Config] = None,
+        base_uri: str = "",
     ) -> "OpenAPI":
-        sp = SchemaPath.from_file(fileobj)
+        sp = SchemaPath.from_file(fileobj, base_uri=base_uri)
         return cls(sp, config=config)
 
     def _get_version(self) -> SpecVersion:
@@ -133,7 +136,8 @@ def check_spec(self) -> None:
         try:
             validate(
                 self.spec.contents(),
-                base_uri=self.config.spec_base_uri,
+                base_uri=self.config.spec_base_uri
+                or self.spec.accessor.resolver._base_uri,  # type: ignore[attr-defined]
                 cls=cls,
             )
         except ValidatorDetectError:
diff --git a/openapi_core/configurations.py b/openapi_core/configurations.py
index 8e8625a2..7abfb4d4 100644
--- a/openapi_core/configurations.py
+++ b/openapi_core/configurations.py
@@ -28,7 +28,7 @@ class Config(UnmarshallerConfig):
         spec_validator_cls
             Specifincation validator class.
         spec_base_uri
-            Specification base uri.
+            Specification base uri. Deprecated, use base_uri parameter in OpenAPI.from_dict and OpenAPI.from_file if you want to define it.
         request_validator_cls
             Request validator class.
         response_validator_cls