Update requirements.txt

requirements.txt

@@ -1,11 +1,16 @@
 fastapi>=0.95.0
 uvicorn>=0.22.0
-httpx>=0.24.0
+httpx>=0.27.0
 openai>=0.27.0
 pydantic>=1.10
 feedparser>=6.0
 xmltodict>=0.13.0
-spacy>=3.5
+
+# NLP & biomodels
+spacy>=3.4.1,<3.5.0
+scispacy>=0.5.1
+https://s3-us-west-2.amazonaws.com/ai2-s2-scispacy/releases/v0.5.1/en_core_sci_sm-0.5.1.tar.gz
+
 python-dotenv>=1.0.0
 pandas>=2.0
 fpdf>=1.7
@@ -13,15 +18,10 @@ plotly>=5.15
 pyvis>=0.3.1
 streamlit-agraph>=0.0.45
 jinja2>=3.0.0
-httpx
 schedule
+
 streamlit>=1.25.0,<2.0
 google-generativeai>=0.5.0
 requests>=2.28.1
 PyYAML>=6.0
-httpx>=0.27
 gql[all]>=3.5
-# Core NLP
-scispacy>=0.5.1
-https://s3-us-west-2.amazonaws.com/ai2-s2-scispacy/releases/v0.5.1/en_core_sci_sm-0.5.1.tar.gz
-# …the rest of your deps…