diff --git a/example/queries/calendar.py b/example/queries/calendar.py
index e1e8638..6c8a86c 100644
--- a/example/queries/calendar.py
+++ b/example/queries/calendar.py
@@ -3,7 +3,6 @@
 from ariadne_graphql_modules import GraphQLObject
 from graphql import GraphQLResolveInfo
 
-from ..database import db
 from ..scalars.date import DateScalar
 from ..scalars.datetime import DateTimeScalar
 
diff --git a/example/scalars/date.py b/example/scalars/date.py
index 28ff68f..1d0a347 100644
--- a/example/scalars/date.py
+++ b/example/scalars/date.py
@@ -14,4 +14,4 @@ def serialize(cls, value: Union["DateScalar", date]) -> str:
 
     @classmethod
     def parse_value(cls, value: str) -> date:
-        return datetime.strptime("%Y-%m-%d").date()
+        return datetime.strptime(value, "%Y-%m-%d").date()
diff --git a/example/subscriptions/events.py b/example/subscriptions/events.py
index 910c309..017cb2e 100644
--- a/example/subscriptions/events.py
+++ b/example/subscriptions/events.py
@@ -13,6 +13,7 @@ class Subscription(GraphQLSubscription):
     event: EventType
 
     @GraphQLSubscription.source("event")
+    @staticmethod
     async def source_event(obj, info: GraphQLResolveInfo) -> AsyncGenerator[int, None]:
         i = 0
 
@@ -22,5 +23,6 @@ async def source_event(obj, info: GraphQLResolveInfo) -> AsyncGenerator[int, Non
             await sleep(float(random.randint(1, 50)) / 10)
 
     @GraphQLSubscription.resolver("event")
+    @staticmethod
     async def resolve_event(obj: int, info: GraphQLResolveInfo) -> dict:
         return {"id": obj, "payload": datetime.now()}