diff --git a/agents/patchmon-agent.sh b/agents/patchmon-agent.sh
index 08fce7b..a760a7b 100755
--- a/agents/patchmon-agent.sh
+++ b/agents/patchmon-agent.sh
@@ -644,16 +644,31 @@ get_yum_packages() {
     fi
     
     # Get upgradable packages
-    local upgradable=$($package_manager check-update 2>/dev/null | grep -v "^$" | grep -v "^Loaded" | grep -v "^Last metadata" | tail -n +2)
+    local upgradable=$($package_manager check-update 2>/dev/null | grep -v "^$" | grep -v "^Loaded" | grep -v "^Last metadata" | grep -v "^Security" | tail -n +2)
     
     while IFS= read -r line; do
+        # Skip empty lines and lines with special characters
+        [[ -z "$line" ]] && continue
+        [[ "$line" =~ ^[[:space:]]*$ ]] && continue
+        
         if [[ "$line" =~ ^([^[:space:]]+)[[:space:]]+([^[:space:]]+)[[:space:]]+([^[:space:]]+) ]]; then
             local package_name="${BASH_REMATCH[1]}"
             local available_version="${BASH_REMATCH[2]}"
             local repo="${BASH_REMATCH[3]}"
             
+            # Sanitize package name and versions (remove any control characters)
+            package_name=$(echo "$package_name" | tr -d '[:cntrl:]' | sed 's/[^a-zA-Z0-9._+-]//g')
+            available_version=$(echo "$available_version" | tr -d '[:cntrl:]' | sed 's/[^a-zA-Z0-9._+-]//g')
+            repo=$(echo "$repo" | tr -d '[:cntrl:]')
+            
+            # Skip if package name is empty after sanitization
+            [[ -z "$package_name" ]] && continue
+            
             # Get current version
-            local current_version=$($package_manager list installed "$package_name" 2>/dev/null | grep "^$package_name" | awk '{print $2}')
+            local current_version=$($package_manager list installed "$package_name" 2>/dev/null | grep "^$package_name" | awk '{print $2}' | tr -d '[:cntrl:]' | sed 's/[^a-zA-Z0-9._+-]//g')
+            
+            # Skip if we couldn't get current version
+            [[ -z "$current_version" ]] && current_version="unknown"
             
             local is_security_update=false
             if echo "$repo" | grep -q "security"; then
@@ -674,10 +689,22 @@ get_yum_packages() {
     local installed=$($package_manager list installed 2>/dev/null | grep -v "^Loaded" | grep -v "^Installed" | head -100)
     
     while IFS= read -r line; do
+        # Skip empty lines
+        [[ -z "$line" ]] && continue
+        [[ "$line" =~ ^[[:space:]]*$ ]] && continue
+        
         if [[ "$line" =~ ^([^[:space:]]+)[[:space:]]+([^[:space:]]+) ]]; then
             local package_name="${BASH_REMATCH[1]}"
             local version="${BASH_REMATCH[2]}"
             
+            # Sanitize package name and version
+            package_name=$(echo "$package_name" | tr -d '[:cntrl:]' | sed 's/[^a-zA-Z0-9._+-]//g')
+            version=$(echo "$version" | tr -d '[:cntrl:]' | sed 's/[^a-zA-Z0-9._+-]//g')
+            
+            # Skip if package name is empty after sanitization
+            [[ -z "$package_name" ]] && continue
+            [[ -z "$version" ]] && version="unknown"
+            
             # Check if this package is not in the upgrade list
             if ! echo "$upgradable" | grep -q "^$package_name "; then
                 if [[ "$first_ref" == true ]]; then
diff --git a/agents/patchmon_install.sh b/agents/patchmon_install.sh
index 1d63ca4..e84b2bc 100644
--- a/agents/patchmon_install.sh
+++ b/agents/patchmon_install.sh
@@ -129,31 +129,56 @@ echo ""
 
 # Install required dependencies
 info "📦 Installing required dependencies..."
+echo ""
 
 # Detect package manager and install jq and curl
 if command -v apt-get >/dev/null 2>&1; then
     # Debian/Ubuntu
+    info "Detected apt-get (Debian/Ubuntu)"
+    echo ""
+    info "Updating package lists..."
     apt-get update
-    apt-get install jq curl -y
-elif command -v yum
+    echo ""
+    info "Installing jq, curl, and bc..."
+    apt-get install jq curl bc -y
+elif command -v yum >/dev/null 2>&1; then
     # CentOS/RHEL 7
-    yum install -y jq curl
-elif command -v dnf
+    info "Detected yum (CentOS/RHEL 7)"
+    echo ""
+    info "Installing jq, curl, and bc..."
+    yum install -y jq curl bc
+elif command -v dnf >/dev/null 2>&1; then
     # CentOS/RHEL 8+/Fedora
-    dnf install -y jq curl
-elif command -v zypper
+    info "Detected dnf (CentOS/RHEL 8+/Fedora)"
+    echo ""
+    info "Installing jq, curl, and bc..."
+    dnf install -y jq curl bc
+elif command -v zypper >/dev/null 2>&1; then
     # openSUSE
-    zypper install -y jq curl
-elif command -v pacman
+    info "Detected zypper (openSUSE)"
+    echo ""
+    info "Installing jq, curl, and bc..."
+    zypper install -y jq curl bc
+elif command -v pacman >/dev/null 2>&1; then
     # Arch Linux
-    pacman -S --noconfirm jq curl
-elif command -v apk
+    info "Detected pacman (Arch Linux)"
+    echo ""
+    info "Installing jq, curl, and bc..."
+    pacman -S --noconfirm jq curl bc
+elif command -v apk >/dev/null 2>&1; then
     # Alpine Linux
-    apk add --no-cache jq curl
+    info "Detected apk (Alpine Linux)"
+    echo ""
+    info "Installing jq, curl, and bc..."
+    apk add --no-cache jq curl bc
 else
-    warning "Could not detect package manager. Please ensure 'jq' and 'curl' are installed manually."
+    warning "Could not detect package manager. Please ensure 'jq', 'curl', and 'bc' are installed manually."
 fi
 
+echo ""
+success "Dependencies installation completed"
+echo ""
+
 # Step 1: Handle existing configuration directory
 info "📁 Setting up configuration directory..."
 
@@ -322,7 +347,7 @@ echo ""
 echo -e "${GREEN}📋 Installation Summary:${NC}"
 echo "   • Configuration directory: /etc/patchmon"
 echo "   • Agent installed: /usr/local/bin/patchmon-agent.sh"
-echo "   • Dependencies installed: jq, curl"
+echo "   • Dependencies installed: jq, curl, bc"
 echo "   • Crontab configured for automatic updates"
 echo "   • API credentials configured and tested"