diff --git a/questionpy_common/api/__init__.py b/questionpy_common/api/__init__.py
index 06dc7b4..a8c9ed0 100644
--- a/questionpy_common/api/__init__.py
+++ b/questionpy_common/api/__init__.py
@@ -1,23 +1,9 @@
 #  This file is part of QuestionPy. (https://questionpy.org)
 #  QuestionPy is free software released under terms of the MIT license. See LICENSE.md.
 #  (c) Technische Universität Berlin, innoCampus <info@isis.tu-berlin.de>
-from collections.abc import (
-    Mapping,
-    Sequence,  # noqa: F401
-)
-from typing import (
-    TypeAlias,
-    Union,  # noqa: F401,
-)
 
 from pydantic import BaseModel
-from typing_extensions import TypeAliasType
 
 
 class Localized(BaseModel):
     lang: str
-
-
-# "Regular" recursive type aliases break Pydantic: https://github.com/pydantic/pydantic/issues/8346
-PlainValue: TypeAlias = TypeAliasType("PlainValue", "Union[None, int, str, bool, Sequence[PlainValue], PlainMapping]")
-PlainMapping: TypeAlias = TypeAliasType("PlainMapping", Mapping[str, PlainValue])
diff --git a/questionpy_common/api/qtype.py b/questionpy_common/api/qtype.py
index da473a8..9e33ba3 100644
--- a/questionpy_common/api/qtype.py
+++ b/questionpy_common/api/qtype.py
@@ -9,9 +9,10 @@
 from questionpy_common.api.package import BasePackageInterface
 
 if TYPE_CHECKING:
+    from pydantic import JsonValue
+
     from questionpy_common.elements import OptionsFormDefinition
 
-    from . import PlainMapping
     from .question import QuestionInterface
 
 __all__ = ["InvalidQuestionStateError", "OptionsFormValidationError", "QuestionTypeInterface"]
@@ -19,7 +20,7 @@
 
 class QuestionTypeInterface(BasePackageInterface, Protocol):
     @abstractmethod
-    def get_options_form(self, question_state: str | None) -> tuple[OptionsFormDefinition, PlainMapping]:
+    def get_options_form(self, question_state: str | None) -> tuple[OptionsFormDefinition, dict[str, JsonValue]]:
         """Get the form used to create a new or edit an existing question.
 
         Args:
@@ -30,7 +31,7 @@ def get_options_form(self, question_state: str | None) -> tuple[OptionsFormDefin
         """
 
     @abstractmethod
-    def create_question_from_options(self, old_state: str | None, form_data: PlainMapping) -> QuestionInterface:
+    def create_question_from_options(self, old_state: str | None, form_data: dict[str, JsonValue]) -> QuestionInterface:
         """Create or update the question (state) with the form data from a submitted question edit form.
 
         Args:
diff --git a/questionpy_common/api/question.py b/questionpy_common/api/question.py
index 53ab036..565c4e8 100644
--- a/questionpy_common/api/question.py
+++ b/questionpy_common/api/question.py
@@ -5,9 +5,9 @@
 from enum import Enum
 from typing import Annotated, Protocol
 
-from pydantic import BaseModel, Field
+from pydantic import BaseModel, Field, JsonValue
 
-from . import Localized, PlainMapping
+from . import Localized
 from .attempt import AttemptModel, AttemptScoredModel, AttemptStartedModel
 
 __all__ = ["PossibleResponse", "QuestionInterface", "QuestionModel", "ScoringMethod", "SubquestionModel"]
@@ -58,7 +58,7 @@ def start_attempt(self, variant: int) -> AttemptStartedModel:
 
     @abstractmethod
     def get_attempt(
-        self, attempt_state: str, scoring_state: str | None = None, response: PlainMapping | None = None
+        self, attempt_state: str, scoring_state: str | None = None, response: dict[str, JsonValue] | None = None
     ) -> AttemptModel:
         """Create an attempt object for a previously started attempt.
 
@@ -77,7 +77,7 @@ def score_attempt(
         self,
         attempt_state: str,
         scoring_state: str | None = None,
-        response: PlainMapping | None = None,
+        response: dict[str, JsonValue] | None = None,
         *,
         try_scoring_with_countback: bool = False,
         try_giving_hint: bool = False,
diff --git a/questionpy_server/worker/runtime/messages.py b/questionpy_server/worker/runtime/messages.py
index 30e90a7..4c580a9 100644
--- a/questionpy_server/worker/runtime/messages.py
+++ b/questionpy_server/worker/runtime/messages.py
@@ -6,9 +6,8 @@
 from struct import Struct
 from typing import Any, ClassVar
 
-from pydantic import BaseModel
+from pydantic import BaseModel, JsonValue
 
-from questionpy_common.api import PlainMapping
 from questionpy_common.api.attempt import AttemptModel, AttemptScoredModel, AttemptStartedModel
 from questionpy_common.api.qtype import InvalidQuestionStateError
 from questionpy_common.api.question import QuestionModel
@@ -155,7 +154,7 @@ class CreateQuestionFromOptions(MessageToWorker):
     request_user: RequestUser
     question_state: str | None
     """Old question state or ``None`` if the question is new."""
-    form_data: PlainMapping
+    form_data: dict[str, JsonValue]
 
     class Response(MessageToServer):
         message_id: ClassVar[MessageIds] = MessageIds.RETURN_CREATE_QUESTION
diff --git a/tests/test_data/package/package_1.qpy b/tests/test_data/package/package_1.qpy
index aee7b5a..1926d13 100644
Binary files a/tests/test_data/package/package_1.qpy and b/tests/test_data/package/package_1.qpy differ
diff --git a/tests/test_data/package/package_2.qpy b/tests/test_data/package/package_2.qpy
index 6a4f7a6..2ba094b 100644
Binary files a/tests/test_data/package/package_2.qpy and b/tests/test_data/package/package_2.qpy differ