diff --git a/cli/main.py b/cli/main.py
index 725cf26f..7dd3524a 100644
--- a/cli/main.py
+++ b/cli/main.py
@@ -396,7 +396,7 @@ def update_display(layout, spinner_text=None):
 def get_user_selections():
     """Get all user selections before starting the analysis display."""
     # Display ASCII art welcome message
-    with open("./cli/static/welcome.txt", "r") as f:
+    with open("./cli/static/welcome.txt", "r", encoding="utf-8") as f:
         welcome_ascii = f.read()
 
     # Create welcome box content
@@ -766,7 +766,7 @@ def run_analysis():
             func(*args, **kwargs)
             timestamp, message_type, content = obj.messages[-1]
             content = content.replace("\n", " ")  # Replace newlines with spaces
-            with open(log_file, "a") as f:
+            with open(log_file, "a", encoding="utf-8") as f:
                 f.write(f"{timestamp} [{message_type}] {content}\n")
         return wrapper
     
@@ -777,7 +777,7 @@ def run_analysis():
             func(*args, **kwargs)
             timestamp, tool_name, args = obj.tool_calls[-1]
             args_str = ", ".join(f"{k}={v}" for k, v in args.items())
-            with open(log_file, "a") as f:
+            with open(log_file, "a", encoding="utf-8") as f:
                 f.write(f"{timestamp} [Tool Call] {tool_name}({args_str})\n")
         return wrapper
 
@@ -790,7 +790,7 @@ def run_analysis():
                 content = obj.report_sections[section_name]
                 if content:
                     file_name = f"{section_name}.md"
-                    with open(report_dir / file_name, "w") as f:
+                    with open(report_dir / file_name, "w", encoding="utf-8") as f:
                         f.write(content)
         return wrapper
 
diff --git a/tradingagents/graph/trading_graph.py b/tradingagents/graph/trading_graph.py
index 18a4fe50..7ac71c3e 100644
--- a/tradingagents/graph/trading_graph.py
+++ b/tradingagents/graph/trading_graph.py
@@ -253,10 +253,8 @@ class TradingAgentsGraph:
         directory = Path(f"eval_results/{self.ticker}/TradingAgentsStrategy_logs/")
         directory.mkdir(parents=True, exist_ok=True)
 
-        with open(
-            f"eval_results/{self.ticker}/TradingAgentsStrategy_logs/full_states_log_{trade_date}.json",
-            "w",
-        ) as f:
+        states_log_file = f"eval_results/{self.ticker}/TradingAgentsStrategy_logs/full_states_log_{trade_date}.json"
+        with open(states_log_file, "w", encoding="utf-8") as f:
             json.dump(self.log_states_dict, f, indent=4)
 
     def reflect_and_remember(self, returns_losses):