diff --git a/duo_agent.py b/duo_agent.py
index d54df64c..bb748cb9 100644
--- a/duo_agent.py
+++ b/duo_agent.py
@@ -20,11 +20,11 @@ equity_analyst_1 = Agent(
     max_tokens=4000,
     saved_state_path="equity_analyst_1.json",
     interactive=False,
-    roles="analyst"
+    roles="analyst",
 )
 
 equity_analyst_2 = Agent(
-    agent_name="Equity-Analyst-2", 
+    agent_name="Equity-Analyst-2",
     agent_description="Equity research analyst focused on technical analysis",
     system_prompt=FINANCIAL_AGENT_SYS_PROMPT,
     max_loops=1,
@@ -39,11 +39,11 @@ equity_analyst_2 = Agent(
     max_tokens=4000,
     saved_state_path="equity_analyst_2.json",
     interactive=False,
-    roles="analyst"
+    roles="analyst",
 )
 
 # Run analysis with both analysts
 equity_analyst_1.talk_to(
     equity_analyst_2,
-    "Analyze high growth tech stocks focusing on fundamentals like revenue growth, margins, and market position. Create a detailed analysis table in markdown."
+    "Analyze high growth tech stocks focusing on fundamentals like revenue growth, margins, and market position. Create a detailed analysis table in markdown.",
 )
diff --git a/swarms/structs/groupchat.py b/swarms/structs/groupchat.py
index 82cdd138..7ea8f66a 100644
--- a/swarms/structs/groupchat.py
+++ b/swarms/structs/groupchat.py
@@ -249,7 +249,9 @@ class GroupChat:
             ValueError: If any required components are missing or invalid
         """
         if len(self.agents) < 2:
-            raise ValueError("At least two agents are required for a group chat")
+            raise ValueError(
+                "At least two agents are required for a group chat"
+            )
         if self.speaker_fn is None:
             raise ValueError("No speaker function provided")
         if self.max_loops <= 0: