diff --git a/codechunk/core/formatter.py b/codechunk/core/formatter.py
index 65014dd..678c24e 100644
--- a/codechunk/core/formatter.py
+++ b/codechunk/core/formatter.py
@@ -1,4 +1,3 @@
-from typing import List, Optional
 from codechunk.core.chunking import ParsedChunk
 
 
@@ -10,7 +9,7 @@ class OutputFormatter:
         self.max_tokens = max_tokens
         self.token_warning_thresholds = [0.7, 0.9, 1.0]
 
-    def format(self, chunks: List[ParsedChunk]) -> str:
+    def format(self, chunks: list[ParsedChunk]) -> str:
         """Format chunks for output."""
         if self.format_type == "ollama":
             return self._format_ollama(chunks)
@@ -19,7 +18,7 @@ class OutputFormatter:
         else:
             return self._format_markdown(chunks)
 
-    def _format_ollama(self, chunks: List[ParsedChunk]) -> str:
+    def _format_ollama(self, chunks: list[ParsedChunk]) -> str:
         """Format for Ollama."""
         lines = []
         lines.append("### System")
@@ -56,7 +55,7 @@ class OutputFormatter:
 
         return "\n".join(lines)
 
-    def _format_lmstudio(self, chunks: List[ParsedChunk]) -> str:
+    def _format_lmstudio(self, chunks: list[ParsedChunk]) -> str:
         """Format for LM Studio."""
         import json
 
@@ -99,7 +98,7 @@ Provide clear, accurate code analysis and assistance."""
 
         return json.dumps(messages, indent=2)
 
-    def _format_markdown(self, chunks: List[ParsedChunk]) -> str:
+    def _format_markdown(self, chunks: list[ParsedChunk]) -> str:
         """Format as markdown."""
         lines = []
         lines.append("# Code Context")
@@ -183,7 +182,7 @@ Provide clear, accurate code analysis and assistance."""
         else:
             return True, ratio, "OK"
 
-    def prune_for_limit(self, chunks: List[ParsedChunk], max_tokens: int) -> List[ParsedChunk]:
+    def prune_for_limit(self, chunks: list[ParsedChunk], max_tokens: int) -> list[ParsedChunk]:
         """Prune chunks to fit within token limit."""
         result = []
         current_tokens = 0