diff --git a/src/crewai/agent.py b/src/crewai/agent.py
index b631be8cb..9ee73e98b 100644
--- a/src/crewai/agent.py
+++ b/src/crewai/agent.py
@@ -98,7 +98,7 @@ class Agent(BaseAgent):
     allow_code_execution: Optional[bool] = Field(
         default=False, description="Enable code execution for the agent."
     )
-    respect_context_window: Optional[bool] = Field(
+    respect_context_window: bool = Field(
         default=True,
         description="Keep messages under the context window size by summarizing content.",
     )
diff --git a/src/crewai/agents/crew_agent_executor.py b/src/crewai/agents/crew_agent_executor.py
index 932711dcb..ccd82174d 100644
--- a/src/crewai/agents/crew_agent_executor.py
+++ b/src/crewai/agents/crew_agent_executor.py
@@ -24,7 +24,7 @@ class CrewAgentExecutor(CrewAgentExecutorMixin):
         task: Any,
         crew: Any,
         agent: Any,
-        prompt: str,
+        prompt: dict[str, str],
         max_iter: int,
         tools: List[Any],
         tools_names: str,
@@ -260,5 +260,5 @@ class CrewAgentExecutor(CrewAgentExecutorMixin):
     def _format_answer(self, answer: str) -> str:
         return CrewAgentParser(agent=self.agent).parse(answer)
 
-    def _format_msg(self, prompt: str, role: str = "user") -> List[Dict[str, str]]:
+    def _format_msg(self, prompt: str, role: str = "user") -> Dict[str, str]:
         return {"role": role, "content": prompt}
diff --git a/src/crewai/cli/authentication/utils.py b/src/crewai/cli/authentication/utils.py
index 09e7491b1..2f5fc183f 100644
--- a/src/crewai/cli/authentication/utils.py
+++ b/src/crewai/cli/authentication/utils.py
@@ -79,7 +79,7 @@ class TokenManager:
         """
         encrypted_data = self.read_secure_file(self.file_path)
 
-        decrypted_data = self.fernet.decrypt(encrypted_data)
+        decrypted_data = self.fernet.decrypt(encrypted_data)  # type: ignore
         data = json.loads(decrypted_data)
 
         expiration = datetime.fromisoformat(data["expiration"])
diff --git a/src/crewai/tasks/task_output.py b/src/crewai/tasks/task_output.py
index b0e8aecd4..d527f6fdb 100644
--- a/src/crewai/tasks/task_output.py
+++ b/src/crewai/tasks/task_output.py
@@ -35,7 +35,7 @@ class TaskOutput(BaseModel):
         return self
 
     @property
-    def json(self) -> Optional[str]:
+    def json(self) -> str:
         if self.output_format != OutputFormat.JSON:
             raise ValueError(
                 """