diff --git a/pylib/anki/decks.py b/pylib/anki/decks.py
index 9c8fa0d3e..a566861d6 100644
--- a/pylib/anki/decks.py
+++ b/pylib/anki/decks.py
@@ -460,8 +460,11 @@ class DeckManager:
         out.extend(self.child_ids(parent_name))
         return out
 
-    def childDids(self, did: int, childMap: Dict[int, Any]) -> List:
-        def gather(node, arr):
+    childMapNode = Dict[int, Any]
+    # Change to Dict[int, "DeckManager.childMapNode"] when MyPy allow recursive type
+
+    def childDids(self, did: int, childMap: DeckManager.childMapNode) -> List:
+        def gather(node: DeckManager.childMapNode, arr):
             for did, child in node.items():
                 arr.append(did)
                 gather(child, arr)
@@ -470,9 +473,9 @@ class DeckManager:
         gather(childMap[did], arr)
         return arr
 
-    def childMap(self) -> Dict[Any, Dict[Any, dict]]:
+    def childMap(self) -> DeckManager.childMapNode:
         nameMap = self.nameMap()
-        childMap = {}
+        childMap: DeckManager.childMapNode = {}
 
         # go through all decks, sorted by name
         for deck in sorted(self.all(), key=self.key):
diff --git a/pylib/anki/hooks.py b/pylib/anki/hooks.py
index ba48e4afa..bfe5afad0 100644
--- a/pylib/anki/hooks.py
+++ b/pylib/anki/hooks.py
@@ -175,20 +175,20 @@ card_will_flush = _CardWillFlushHook()
 class _DeckAddedHook:
     """Obsolete, do not use."""
 
-    _hooks: List[Callable[[Dict[str, Any]], None]] = []
+    _hooks: List[Callable[[Deck], None]] = []
 
-    def append(self, cb: Callable[[Dict[str, Any]], None]) -> None:
-        """(deck: Dict[str, Any])"""
+    def append(self, cb: Callable[[Deck], None]) -> None:
+        """(deck: Deck)"""
         self._hooks.append(cb)
 
-    def remove(self, cb: Callable[[Dict[str, Any]], None]) -> None:
+    def remove(self, cb: Callable[[Deck], None]) -> None:
         if cb in self._hooks:
             self._hooks.remove(cb)
 
     def count(self) -> int:
         return len(self._hooks)
 
-    def __call__(self, deck: Dict[str, Any]) -> None:
+    def __call__(self, deck: Deck) -> None:
         for hook in self._hooks:
             try:
                 hook(deck)
@@ -305,20 +305,20 @@ media_files_did_export = _MediaFilesDidExportHook()
 class _NoteTypeAddedHook:
     """Obsolete, do not use."""
 
-    _hooks: List[Callable[[Dict[str, Any]], None]] = []
+    _hooks: List[Callable[[NoteType], None]] = []
 
-    def append(self, cb: Callable[[Dict[str, Any]], None]) -> None:
-        """(notetype: Dict[str, Any])"""
+    def append(self, cb: Callable[[NoteType], None]) -> None:
+        """(notetype: NoteType)"""
         self._hooks.append(cb)
 
-    def remove(self, cb: Callable[[Dict[str, Any]], None]) -> None:
+    def remove(self, cb: Callable[[NoteType], None]) -> None:
         if cb in self._hooks:
             self._hooks.remove(cb)
 
     def count(self) -> int:
         return len(self._hooks)
 
-    def __call__(self, notetype: Dict[str, Any]) -> None:
+    def __call__(self, notetype: NoteType) -> None:
         for hook in self._hooks:
             try:
                 hook(notetype)
@@ -397,20 +397,20 @@ class _SchedulerNewLimitForSingleDeckFilter:
     """Allows changing the number of new card for this deck (without
         considering descendants)."""
 
-    _hooks: List[Callable[[int, Dict[str, Any]], int]] = []
+    _hooks: List[Callable[[int, Deck], int]] = []
 
-    def append(self, cb: Callable[[int, Dict[str, Any]], int]) -> None:
-        """(count: int, deck: Dict[str, Any])"""
+    def append(self, cb: Callable[[int, Deck], int]) -> None:
+        """(count: int, deck: Deck)"""
         self._hooks.append(cb)
 
-    def remove(self, cb: Callable[[int, Dict[str, Any]], int]) -> None:
+    def remove(self, cb: Callable[[int, Deck], int]) -> None:
         if cb in self._hooks:
             self._hooks.remove(cb)
 
     def count(self) -> int:
         return len(self._hooks)
 
-    def __call__(self, count: int, deck: Dict[str, Any]) -> int:
+    def __call__(self, count: int, deck: Deck) -> int:
         for filter in self._hooks:
             try:
                 count = filter(count, deck)
@@ -428,20 +428,20 @@ class _SchedulerReviewLimitForSingleDeckFilter:
     """Allows changing the number of rev card for this deck (without
         considering descendants)."""
 
-    _hooks: List[Callable[[int, Dict[str, Any]], int]] = []
+    _hooks: List[Callable[[int, Deck], int]] = []
 
-    def append(self, cb: Callable[[int, Dict[str, Any]], int]) -> None:
-        """(count: int, deck: Dict[str, Any])"""
+    def append(self, cb: Callable[[int, Deck], int]) -> None:
+        """(count: int, deck: Deck)"""
         self._hooks.append(cb)
 
-    def remove(self, cb: Callable[[int, Dict[str, Any]], int]) -> None:
+    def remove(self, cb: Callable[[int, Deck], int]) -> None:
         if cb in self._hooks:
             self._hooks.remove(cb)
 
     def count(self) -> int:
         return len(self._hooks)
 
-    def __call__(self, count: int, deck: Dict[str, Any]) -> int:
+    def __call__(self, count: int, deck: Deck) -> int:
         for filter in self._hooks:
             try:
                 count = filter(count, deck)
diff --git a/pylib/anki/schedv2.py b/pylib/anki/schedv2.py
index 8fc8f720e..66d8c2f99 100644
--- a/pylib/anki/schedv2.py
+++ b/pylib/anki/schedv2.py
@@ -13,6 +13,7 @@ import anki  # pylint: disable=unused-import
 from anki import hooks
 from anki.cards import Card
 from anki.consts import *
+from anki.decks import DeckManager
 from anki.lang import _
 from anki.rsbackend import (
     CountsForDeckToday,
@@ -791,7 +792,7 @@ and due <= ? limit ?)""",
                 lim = min(lim, self._deckRevLimitSingle(parent, parentLimit=lim))
         return hooks.scheduler_review_limit_for_single_deck(lim, d)
 
-    def _revForDeck(self, did: int, lim: int, childMap: Dict[int, Any]) -> Any:
+    def _revForDeck(self, did: int, lim: int, childMap: DeckManager.childMapNode) -> Any:
         dids = [did] + self.col.decks.childDids(did, childMap)
         lim = min(lim, self.reportLimit)
         return self.col.db.scalar(
diff --git a/qt/aqt/gui_hooks.py b/qt/aqt/gui_hooks.py
index bd25a03b9..f5854c743 100644
--- a/qt/aqt/gui_hooks.py
+++ b/qt/aqt/gui_hooks.py
@@ -827,20 +827,20 @@ collection_did_load = _CollectionDidLoadHook()
 
 
 class _CurrentNoteTypeDidChangeHook:
-    _hooks: List[Callable[[Dict[str, Any]], None]] = []
+    _hooks: List[Callable[[NoteType], None]] = []
 
-    def append(self, cb: Callable[[Dict[str, Any]], None]) -> None:
-        """(notetype: Dict[str, Any])"""
+    def append(self, cb: Callable[[NoteType], None]) -> None:
+        """(notetype: NoteType)"""
         self._hooks.append(cb)
 
-    def remove(self, cb: Callable[[Dict[str, Any]], None]) -> None:
+    def remove(self, cb: Callable[[NoteType], None]) -> None:
         if cb in self._hooks:
             self._hooks.remove(cb)
 
     def count(self) -> int:
         return len(self._hooks)
 
-    def __call__(self, notetype: Dict[str, Any]) -> None:
+    def __call__(self, notetype: NoteType) -> None:
         for hook in self._hooks:
             try:
                 hook(notetype)