diff --git a/crawl4ai/extraction_strategy.py b/crawl4ai/extraction_strategy.py
index 080229f4..d04ec298 100644
--- a/crawl4ai/extraction_strategy.py
+++ b/crawl4ai/extraction_strategy.py
@@ -101,7 +101,7 @@ class LLMExtractionStrategy(ExtractionStrategy):
             variable_values["REQUEST"] = self.instruction
             prompt_with_variables = PROMPT_EXTRACT_BLOCKS_WITH_INSTRUCTION
             
-        if self.extract_type == "schema":
+        if self.extract_type == "schema" and self.schema:
             variable_values["SCHEMA"] = json.dumps(self.schema, indent=2)
             prompt_with_variables = PROMPT_EXTRACT_SCHEMA_WITH_INSTRUCTION
 
diff --git a/crawl4ai/utils.py b/crawl4ai/utils.py
index 07832888..b6f97223 100644
--- a/crawl4ai/utils.py
+++ b/crawl4ai/utils.py
@@ -834,7 +834,6 @@ def extract_blocks_batch(batch_data, provider = "groq/llama3-70b-8192", api_toke
     
     return sum(all_blocks, [])
 
-
 def merge_chunks_based_on_token_threshold(chunks, token_threshold):
     """
     Merges small chunks into larger ones based on the total token threshold.
@@ -880,7 +879,6 @@ def process_sections(url: str, sections: list, provider: str, api_token: str) ->
     
     return extracted_content
 
-
 def wrap_text(draw, text, font, max_width):
     # Wrap the text to fit within the specified width
     lines = []
@@ -892,7 +890,6 @@ def wrap_text(draw, text, font, max_width):
         lines.append(line)
     return '\n'.join(lines)
 
-
 def format_html(html_string):
     soup = BeautifulSoup(html_string, 'html.parser')
     return soup.prettify()
diff --git a/setup.py b/setup.py
index af929125..841f85a8 100644
--- a/setup.py
+++ b/setup.py
@@ -19,7 +19,7 @@ with open("requirements.txt") as f:
     requirements = f.read().splitlines()
 
 # Define the requirements for different environments
-default_requirements = [req for req in requirements if not req.startswith(("torch", "transformers", "onnxruntime", "nltk", "spacy", "tokenizers", "scikit-learn", "numpy"))]
+default_requirements = [req for req in requirements if not req.startswith(("torch", "transformers", "onnxruntime", "nltk", "spacy", "tokenizers", "scikit-learn"))]
 torch_requirements = [req for req in requirements if req.startswith(("torch", "nltk", "spacy", "scikit-learn", "numpy"))]
 transformer_requirements = [req for req in requirements if req.startswith(("transformers", "tokenizers", "onnxruntime"))]