diff --git a/app/services/insight.py b/app/services/insight.py
index 7e25de3..06cca4c 100644
--- a/app/services/insight.py
+++ b/app/services/insight.py
@@ -87,11 +87,15 @@ class QueryProcessor:
             context_parts.append(f"Location: {investor_headquarters}")
         if investor_description:
             context_parts.append(f"Description: {investor_description}")
-        if investment_thesis:
-            thesis_str = ", ".join(investment_thesis[:3])  # Limit to first 3
+        if investment_thesis and isinstance(investment_thesis, list):
+            thesis_str = ", ".join(
+                str(item) for item in investment_thesis[:3]
+            )  # Limit to first 3
             context_parts.append(f"Investment Focus: {thesis_str}")
-        if portfolio_highlights:
-            portfolio_str = ", ".join(portfolio_highlights[:5])  # Limit to first 5
+        if portfolio_highlights and isinstance(portfolio_highlights, list):
+            portfolio_str = ", ".join(
+                str(item) for item in portfolio_highlights[:5]
+            )  # Limit to first 5
             context_parts.append(f"Notable Portfolio Companies: {portfolio_str}")
 
         context = "\n".join(context_parts)