diff --git a/copier/errors.py b/copier/errors.py
index cb3bdf830..2b62378bf 100644
--- a/copier/errors.py
+++ b/copier/errors.py
@@ -9,7 +9,8 @@
 from .types import PathSeq
 
 if TYPE_CHECKING:  # always false
-    from .user_data import AnswersMap, Question, Template
+    from .template import Template
+    from .user_data import AnswersMap, Question
 
 
 # Errors
diff --git a/copier/main.py b/copier/main.py
index c07e5e1e0..85715204f 100644
--- a/copier/main.py
+++ b/copier/main.py
@@ -9,7 +9,7 @@
 from itertools import chain
 from pathlib import Path
 from shutil import rmtree
-from typing import Callable, List, Mapping, Optional, Sequence
+from typing import Callable, Iterable, List, Mapping, Optional, Sequence
 from unicodedata import normalize
 
 import pathspec
@@ -40,7 +40,8 @@
 try:
     from functools import cached_property
 except ImportError:
-    from backports.cached_property import cached_property
+    # HACK https://github.com/python/mypy/issues/1153#issuecomment-558556828
+    from backports.cached_property import cached_property  # type: ignore
 
 
 @dataclass
@@ -130,7 +131,7 @@ class Worker:
     """
 
     src_path: Optional[str] = None
-    dst_path: Path = field(default=".")
+    dst_path: Path = field(default=Path("."))
     answers_file: Optional[RelativePath] = None
     vcs_ref: OptStr = None
     data: AnyByStrDict = field(default_factory=dict)
@@ -208,7 +209,7 @@ def _render_context(self) -> Mapping:
             _folder_name=self.subproject.local_abspath.name,
         )
 
-    def _path_matcher(self, patterns: StrSeq) -> Callable[[Path], bool]:
+    def _path_matcher(self, patterns: Iterable[str]) -> Callable[[Path], bool]:
         """Produce a function that matches against specified patterns."""
         # TODO Is normalization really needed?
         normalized_patterns = (normalize("NFD", pattern) for pattern in patterns)
@@ -345,7 +346,7 @@ def answers(self) -> AnswersMap:
                     question.get_default()
                     if self.defaults
                     else unsafe_prompt(
-                        question.get_questionary_structure(), answers=result.combined
+                        [question.get_questionary_structure()], answers=result.combined
                     )[question.var_name]
                 )
             except KeyboardInterrupt as err:
diff --git a/copier/subproject.py b/copier/subproject.py
index c4d400978..73fd22634 100644
--- a/copier/subproject.py
+++ b/copier/subproject.py
@@ -3,6 +3,7 @@
 A *subproject* is a project that gets rendered and/or updated with Copier.
 """
 
+import sys
 from pathlib import Path
 from typing import Optional
 
@@ -15,9 +16,10 @@
 from .types import AbsolutePath, AnyByStrDict, VCSTypes
 from .vcs import is_in_git_repo
 
-try:
+# HACK https://github.com/python/mypy/issues/8520#issuecomment-772081075
+if sys.version_info >= (3, 8):
     from functools import cached_property
-except ImportError:
+else:
     from backports.cached_property import cached_property
 
 
diff --git a/copier/template.py b/copier/template.py
index 7652c5b68..75b3f9968 100644
--- a/copier/template.py
+++ b/copier/template.py
@@ -30,13 +30,10 @@
 try:
     from functools import cached_property
 except ImportError:
-    from backports.cached_property import cached_property
-
-try:
-    from typing import Literal
-except ImportError:
-    from typing_extensions import Literal
+    # HACK https://github.com/python/mypy/issues/1153#issuecomment-558556828
+    from backports.cached_property import cached_property  # type: ignore
 
+from .types import Literal
 
 # Default list of files in the template to exclude from the rendered project
 DEFAULT_EXCLUDE: Tuple[str, ...] = (
diff --git a/copier/tools.py b/copier/tools.py
index ea90d27bf..be415510f 100644
--- a/copier/tools.py
+++ b/copier/tools.py
@@ -9,13 +9,14 @@
 import warnings
 from contextlib import suppress
 from pathlib import Path
-from typing import Any, Callable, Optional, TextIO, Union
+from types import TracebackType
+from typing import Any, Callable, Optional, TextIO, Tuple, Union
 
 import colorama
 from packaging.version import Version
 from pydantic import StrictBool
 
-from .types import ExcInfo, IntSeq
+from .types import IntSeq
 
 try:
     from importlib.metadata import version
@@ -128,7 +129,9 @@ def force_str_end(original_str: str, end: str = "\n") -> str:
     return original_str
 
 
-def handle_remove_readonly(func: Callable, path: str, exc: ExcInfo) -> None:
+def handle_remove_readonly(
+    func: Callable, path: str, exc: Tuple[BaseException, OSError, TracebackType]
+) -> None:
     """Handle errors when trying to remove read-only files through `shutil.rmtree`.
 
     This handler makes sure the given file is writable, then re-execute the given removal function.
diff --git a/copier/types.py b/copier/types.py
index 8b18a6649..99dfd1c9c 100644
--- a/copier/types.py
+++ b/copier/types.py
@@ -1,7 +1,7 @@
 """Complex types, annotations, validators."""
 
+import sys
 from pathlib import Path
-from types import TracebackType
 from typing import (
     TYPE_CHECKING,
     Any,
@@ -18,9 +18,10 @@
 
 from pydantic.validators import path_validator
 
-try:
+# HACK https://github.com/python/mypy/issues/8520#issuecomment-772081075
+if sys.version_info >= (3, 8):
     from typing import Literal
-except ImportError:
+else:
     from typing_extensions import Literal
 
 if TYPE_CHECKING:
@@ -54,7 +55,6 @@
 Filters = Dict[str, Callable]
 LoaderPaths = Union[str, Iterable[str]]
 VCSTypes = Literal["git"]
-ExcInfo = Tuple[BaseException, Exception, TracebackType]
 
 
 class AllowArbitraryTypes:
diff --git a/copier/user_data.py b/copier/user_data.py
index 9c295bf21..4d2fe9a3f 100644
--- a/copier/user_data.py
+++ b/copier/user_data.py
@@ -1,6 +1,7 @@
 """Functions used to load user data."""
 import datetime
 import json
+import sys
 import warnings
 from collections import ChainMap
 from dataclasses import field
@@ -30,9 +31,10 @@
 from .tools import cast_str_to_bool, force_str_end
 from .types import AllowArbitraryTypes, AnyByStrDict, OptStr, OptStrOrPath, StrOrPath
 
-try:
+# HACK https://github.com/python/mypy/issues/8520#issuecomment-772081075
+if sys.version_info >= (3, 8):
     from functools import cached_property
-except ImportError:
+else:
     from backports.cached_property import cached_property
 
 if TYPE_CHECKING:
@@ -249,7 +251,7 @@ def get_default_rendered(self) -> Union[bool, str, Choice, None]:
             return json.dumps(default, indent=2 if self.get_multiline() else None)
         if self.get_type_name() == "yaml":
             return yaml.safe_dump(
-                default, default_flow_style=not self.get_multiline(), width=float("inf")
+                default, default_flow_style=not self.get_multiline(), width=2147483647
             ).strip()
         # All other data has to be str
         return str(default)
diff --git a/mypy.ini b/mypy.ini
deleted file mode 100644
index 0f2fd850e..000000000
--- a/mypy.ini
+++ /dev/null
@@ -1,3 +0,0 @@
-[mypy]
-warn_no_return = False
-ignore_missing_imports = True
diff --git a/poetry.lock b/poetry.lock
index d4bd49f0b..e5ce2dada 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -960,6 +960,22 @@ category = "dev"
 optional = false
 python-versions = "*"
 
+[[package]]
+name = "types-backports"
+version = "0.1.3"
+description = "Typing stubs for backports"
+category = "dev"
+optional = false
+python-versions = "*"
+
+[[package]]
+name = "types-pyyaml"
+version = "6.0.1"
+description = "Typing stubs for PyYAML"
+category = "dev"
+optional = false
+python-versions = "*"
+
 [[package]]
 name = "typing-extensions"
 version = "4.0.1"
@@ -1038,7 +1054,7 @@ docs = ["mkdocs-material", "mkdocs-mermaid2-plugin", "mkdocstrings"]
 [metadata]
 lock-version = "1.1"
 python-versions = ">=3.7,<4.0"
-content-hash = "89dd72d65d3cb72ae43ecb4b9b22d4d466d703811276a16179382d8e9d8b45de"
+content-hash = "84b47831c5fcded1731e27119d7b7133470c89070769aeaae57b9a42adffe6ab"
 
 [metadata.files]
 astunparse = [
@@ -1622,6 +1638,14 @@ typed-ast = [
     {file = "typed_ast-1.4.3-cp39-cp39-win_amd64.whl", hash = "sha256:9c6d1a54552b5330bc657b7ef0eae25d00ba7ffe85d9ea8ae6540d2197a3788c"},
     {file = "typed_ast-1.4.3.tar.gz", hash = "sha256:fb1bbeac803adea29cedd70781399c99138358c26d05fcbd23c13016b7f5ec65"},
 ]
+types-backports = [
+    {file = "types-backports-0.1.3.tar.gz", hash = "sha256:f4b7206c073df88d6200891e3d27506185fd60cda66fb289737b2fa92c0010cf"},
+    {file = "types_backports-0.1.3-py2.py3-none-any.whl", hash = "sha256:dafcd61848081503e738a7768872d1dd6c018401b4d2a1cfb608ea87ec9864b9"},
+]
+types-pyyaml = [
+    {file = "types-PyYAML-6.0.1.tar.gz", hash = "sha256:2e27b0118ca4248a646101c5c318dc02e4ca2866d6bc42e84045dbb851555a76"},
+    {file = "types_PyYAML-6.0.1-py3-none-any.whl", hash = "sha256:d5b318269652e809b5c30a5fe666c50159ab80bfd41cd6bafe655bf20b29fcba"},
+]
 typing-extensions = [
     {file = "typing_extensions-4.0.1-py3-none-any.whl", hash = "sha256:7f001e5ac290a0c0401508864c7ec868be4e701886d5b573a9528ed3973d9d3b"},
     {file = "typing_extensions-4.0.1.tar.gz", hash = "sha256:4ca091dea149f945ec56afb48dae714f21e8692ef22a395223bcd328961b6a0e"},
diff --git a/pyproject.toml b/pyproject.toml
index c541600c6..577d54bf4 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,7 +40,7 @@ mkdocstrings = { version = ">=0.16.2,<0.18.0", optional = true }
 packaging = "^21.0" # packaging is needed when installing from PyPI
 pathspec = "^0.9.0"
 plumbum = "^1.6.9"
-pydantic = "^1.7.2"
+pydantic = "^1.9.0"
 Pygments = "^2.7.1"
 PyYAML = "^5.3.1"
 pyyaml-include = "^1.2"
@@ -68,6 +68,8 @@ pre-commit = "^2.16.0"
 pytest = "^6.1.1"
 pytest-cov = "^3.0.0"
 pytest-xdist = "^2.5.0"
+types-PyYAML = "^6.0.1"
+types-backports = "^0.1.3"
 
 [tool.poe.tasks.clean]
 script = "devtasks:clean"
@@ -116,6 +118,11 @@ line_length = 88
 multi_line_output = 3 # black interop
 use_parentheses = true
 
+[tool.mypy]
+ignore_missing_imports = true
+plugins = ["pydantic.mypy"]
+warn_no_return = false
+
 [build-system]
 requires = ["poetry_core>=1.0.0", "poetry-dynamic-versioning"]
 build-backend = "poetry.core.masonry.api"
diff --git a/tests/test_templated_prompt.py b/tests/test_templated_prompt.py
index 4ae7adf18..02518c90a 100644
--- a/tests/test_templated_prompt.py
+++ b/tests/test_templated_prompt.py
@@ -17,7 +17,6 @@
     build_file_tree,
 )
 
-envops = {}
 main_default = "copier"
 main_question = {
     "main": {"default": main_default},