diff --git a/.python-version b/.python-version
new file mode 100644
index 0000000..2c07333
--- /dev/null
+++ b/.python-version
@@ -0,0 +1 @@
+3.11
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..815858a
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,27 @@
+# Changelog
+
+## [Unreleased] - Fix Python Compatibility Issues
+
+### Fixed
+- Fixed Python 3.13 compatibility issue with `blis==1.2.0` by documenting Python version requirements (3.9-3.11)
+- Fixed `torch==2.4.1` installation by installing from PyTorch repository instead of PyPI
+- Fixed NumPy 2.x compatibility issues by constraining to `numpy<2.0` for spacy/thinc compatibility
+- Improved `setup.sh` with Python version detection and proper dependency installation order
+- Updated README with comprehensive installation instructions and troubleshooting section
+
+### Changed
+- Updated `requirements.txt` to remove torch (installed separately) and constrain NumPy version
+- Enhanced `setup.sh` with error handling and version checking
+- Updated README with Python version requirements and alternative installation methods
+
+### Added
+- Added `.python-version` file to specify recommended Python version
+- Added comprehensive troubleshooting section to README
+- Added Python version detection in setup script
+
+### Technical Details
+- **Python Compatibility**: Now explicitly supports Python 3.9, 3.10, and 3.11
+- **PyTorch Installation**: Uses PyTorch repository for better version compatibility
+- **NumPy Version**: Constrained to <2.0 to avoid compatibility issues with spacy/thinc
+- **Dependency Order**: Setup script now installs dependencies in correct order
+
diff --git a/README.md b/README.md
index d9f8c6a..e460d28 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 Transform AI-generated text into **formal, human-like, and academic writing** with ease, avoids AI detector! 🚀
 
 ![Streamlit](https://img.shields.io/badge/Streamlit-Web_App-red?style=flat-square&logo=streamlit)
-![Python](https://img.shields.io/badge/Python-3.10-blue?style=flat-square&logo=python)
+![Python](https://img.shields.io/badge/Python-3.9%20%7C%203.10%20%7C%203.11-blue?style=flat-square&logo=python)
 ![License](https://img.shields.io/github/license/DadaNanjesha/AI-Text-Humanizer-App?style=flat-square)
 
 
@@ -32,6 +32,11 @@ Building new version of this project here in this repos https://github.com/DadaN
 
 ## 📥 Installation  
 
+### ⚠️ Python Version Requirements
+- **Required**: Python 3.9, 3.10, or 3.11
+- **Not supported**: Python 3.12+ (dependency compatibility issues)
+- **Not supported**: Python 3.8 or earlier
+
 ### 1️⃣ Clone the Repository  
 ```bash
 git clone https://github.com/DadaNanjesha/AI-Text-Humanizer-App.git
@@ -40,23 +45,51 @@ cd AI-Text-Humanizer-App
 
 ### 2️⃣ Set Up a Virtual Environment (Recommended)  
 ```bash
-python -m venv venv
+python3.11 -m venv venv  # Use Python 3.9, 3.10, or 3.11
 source venv/bin/activate   # Linux/Mac
 venv\Scripts\activate      # Windows
 ```
 
 ### 3️⃣ Install Dependencies  
+
+**Option A: Using setup.sh (Recommended)**
 ```bash
-pip install --upgrade pip
-pip install -r requirements.txt
+chmod +x setup.sh
+./setup.sh
 ```
 
-### 4️⃣ Download NLP Models  
+**Option B: Manual Installation**
 ```bash
+pip install --upgrade pip setuptools wheel
+
+# Install NumPy first (must be <2.0 for compatibility)
+pip install "numpy<2.0"
+
+# Install PyTorch from PyTorch repository
+pip install torch --index-url https://download.pytorch.org/whl/cpu
+
+# Install other dependencies
+pip install -r requirements.txt
+
+# Download NLP models
 python -m spacy download en_core_web_sm
-python -c "import nltk; nltk.download('punkt'); nltk.download('wordnet'); nltk.download('averaged_perceptron_tagger');"
+python -c "import nltk; nltk.download('punkt', quiet=True); nltk.download('wordnet', quiet=True); nltk.download('averaged_perceptron_tagger', quiet=True)"
 ```
 
+### 🔧 Troubleshooting
+
+**Issue: `blis==1.2.0` installation fails**
+- **Solution**: Use Python 3.9-3.11. Python 3.12+ is not supported.
+
+**Issue: `torch==2.4.1` not found**
+- **Solution**: Install torch from PyTorch repository: `pip install torch --index-url https://download.pytorch.org/whl/cpu`
+
+**Issue: NumPy compatibility warnings**
+- **Solution**: NumPy 2.x is not compatible. The setup script automatically installs NumPy <2.0.
+
+**Issue: spaCy model download fails**
+- **Solution**: Ensure you have internet connection and try: `python -m spacy download en_core_web_sm`
+
 ---
 
 ## 🖥️ Usage  
diff --git a/requirements.txt b/requirements.txt
index b52a567..8656ba5 100644
Binary files a/requirements.txt and b/requirements.txt differ
diff --git a/setup.sh b/setup.sh
old mode 100644
new mode 100755
index 265e7c6..3ddb1a2
--- a/setup.sh
+++ b/setup.sh
@@ -1,14 +1,61 @@
 #!/usr/bin/env bash
 
-echo "Installing pip dependencies..."
-pip install --upgrade pip
+# AI Text Humanizer App - Setup Script
+# This script handles dependency installation with proper version compatibility
+
+set -e  # Exit on error
+
+echo "🔧 Setting up AI Text Humanizer App..."
+
+# Check Python version
+PYTHON_VERSION=$(python3 --version 2>&1 | awk '{print $2}' | cut -d. -f1,2)
+PYTHON_MAJOR=$(echo $PYTHON_VERSION | cut -d. -f1)
+PYTHON_MINOR=$(echo $PYTHON_VERSION | cut -d. -f2)
+
+echo "📌 Detected Python version: $PYTHON_VERSION"
+
+# Check if Python version is compatible (3.9-3.11)
+if [ "$PYTHON_MAJOR" -lt 3 ] || ([ "$PYTHON_MAJOR" -eq 3 ] && [ "$PYTHON_MINOR" -lt 9 ]); then
+    echo "❌ Error: Python 3.9 or higher is required. Found Python $PYTHON_VERSION"
+    echo "Please upgrade Python to 3.9, 3.10, or 3.11"
+    exit 1
+fi
+
+if [ "$PYTHON_MAJOR" -eq 3 ] && [ "$PYTHON_MINOR" -gt 11 ]; then
+    echo "⚠️  Warning: Python 3.12+ detected. Some dependencies may not be compatible."
+    echo "Consider using Python 3.9-3.11 for best compatibility."
+    echo "Continuing with installation..."
+fi
+
+# Upgrade pip
+echo "📦 Upgrading pip..."
+pip install --upgrade pip setuptools wheel
+
+# Install NumPy first (required for other packages, must be <2.0 for spacy compatibility)
+echo "📦 Installing NumPy (compatible version)..."
+pip install "numpy<2.0"
+
+# Install torch from PyTorch repository (handles version compatibility automatically)
+echo "📦 Installing PyTorch (CPU version) from PyTorch repository..."
+pip install torch --index-url https://download.pytorch.org/whl/cpu
+
+# Install other dependencies from requirements.txt
+echo "📦 Installing other dependencies..."
 pip install -r requirements.txt
-pip install streamlit spacy sentence-transformers nltk
 
-echo "Installing spaCy model..."
+# Download spaCy model
+echo "📥 Downloading spaCy model (en_core_web_sm)..."
 python -m spacy download en_core_web_sm
-python -m nltk.downloader all
 
+# Download NLTK resources
+echo "📥 Downloading NLTK resources..."
+python -c "import nltk; nltk.download('punkt', quiet=True); nltk.download('wordnet', quiet=True); nltk.download('averaged_perceptron_tagger', quiet=True); nltk.download('punkt_tab', quiet=True); nltk.download('averaged_perceptron_tagger_eng', quiet=True)" || {
+    echo "⚠️  Warning: Some NLTK downloads may have failed, but continuing..."
+}
 
-echo "Downloading NLTK data..."
-python -c "import nltk; nltk.download('punkt_tab', quiet=True); nltk.download('punkt', quiet=True); nltk.download('wordnet', quiet=True); nltk.download('averaged_perceptron_tagger', quiet=True)"
+echo ""
+echo "✅ Installation complete!"
+echo ""
+echo "🚀 To run the app:"
+echo "   streamlit run main.py"
+echo ""