diff --git a/docs/managers/credit.md b/docs/managers/credit.md
index f0424b6..acf0b95 100644
--- a/docs/managers/credit.md
+++ b/docs/managers/credit.md
@@ -91,6 +91,9 @@ expiry_date: date | Literal[False]
 
 The date the credit expires, if an expiry date is set.
 
+*Changed in version 0.2.6*: Fixed incorrect annotation for `expiry_date`
+by marking it as optional.
+
 ### `initial_balance`
 
 ```python
diff --git a/docs/managers/grant.md b/docs/managers/grant.md
index db74988..895515c 100644
--- a/docs/managers/grant.md
+++ b/docs/managers/grant.md
@@ -56,6 +56,9 @@ expiry_date: date | Literal[False]
 
 The date the grant expires, if an expiry date is set.
 
+*Changed in version 0.2.6*: Fixed incorrect annotation for `expiry_date`
+by marking it as optional.
+
 ### `grant_type_id`
 
 ```python
diff --git a/openstack_odooclient/managers/credit.py b/openstack_odooclient/managers/credit.py
index aa1a28e..167bcdd 100644
--- a/openstack_odooclient/managers/credit.py
+++ b/openstack_odooclient/managers/credit.py
@@ -41,7 +41,11 @@ class Credit(RecordBase["CreditManager"]):
     """The current remaining balance on the credit."""
 
     expiry_date: date | Literal[False]
-    """The date the credit expires, if an expiry date is set."""
+    """The date the credit expires, if an expiry date is set.
+
+    *Changed in version 0.2.6*: Fixed incorrect annotation for ``expiry_date``
+    by marking it as optional.
+    """
 
     initial_balance: float
     """The initial balance this credit started off with."""
diff --git a/openstack_odooclient/managers/grant.py b/openstack_odooclient/managers/grant.py
index c533561..ef61c36 100644
--- a/openstack_odooclient/managers/grant.py
+++ b/openstack_odooclient/managers/grant.py
@@ -25,7 +25,11 @@
 
 class Grant(RecordBase["GrantManager"]):
     expiry_date: date | Literal[False]
-    """The date the grant expires, if an expiry date is set."""
+    """The date the grant expires, if an expiry date is set.
+
+    *Changed in version 0.2.6*: Fixed incorrect annotation for ``expiry_date``
+    by marking it as optional.
+    """
 
     grant_type_id: Annotated[int, ModelRef("grant_type", GrantType)]
     """The ID of the type of this grant."""