diff --git a/Dockerfile b/Dockerfile
index f587337..86e5677 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -121,9 +121,9 @@ RUN mkdir -p /home/web/data \
 WORKDIR /home/web/data
 
 # Container defaults - Shopify AI App Builder
-# Port 4000: Web UI (chat/builder interface)
-# Port 4001: ttyd terminal
-EXPOSE 4001 4000
+# Port 4500: Web UI (chat/builder interface)
+# Port 4501: ttyd terminal
+EXPOSE 4501 4500
 HEALTHCHECK --interval=30s --timeout=15s --start-period=60s --retries=5 \
     CMD /usr/local/bin/healthcheck.sh || exit 1
 
diff --git a/docker-compose.yml b/docker-compose.yml
index 1371caa..7f4f8bc 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -3,8 +3,8 @@ services:
   shopify-ai-builder:
     build: .
     ports:
-      - "4001:4001"
-      - "4000:4000"
+      - "4501:4501"
+      - "4500:4500"
     restart: unless-stopped
     environment:
       - OPENCODE_API_KEY=${OPENCODE_API_KEY:-}
diff --git a/scripts/build-and-verify.ps1 b/scripts/build-and-verify.ps1
index 5416430..b37ba38 100644
--- a/scripts/build-and-verify.ps1
+++ b/scripts/build-and-verify.ps1
@@ -31,8 +31,8 @@ if ($LASTEXITCODE -ne 0) {
 }
 
 Write-Host "All checks passed." -ForegroundColor Green
-Write-Host "Open http://localhost:4000 for the web interface." -ForegroundColor Cyan
-Write-Host "Open http://localhost:4001 for the terminal." -ForegroundColor Cyan
+Write-Host "Open http://localhost:4500 for the web interface." -ForegroundColor Cyan
+Write-Host "Open http://localhost:4501 for the terminal." -ForegroundColor Cyan
 Write-Host "Verifying `github` helper is available in profile (sourcing profile)..."
 docker compose exec wordpress-plugin-ai-builder pwsh -NoProfile -Command ". /root/.config/powershell/Microsoft.PowerShell_profile.ps1; Get-Command github"
 if ($LASTEXITCODE -ne 0) { Write-Warning "`github` helper not detected. Ensure you built the image with the new profile, or update the volume via README instructions." }
diff --git a/scripts/diagnostic-logger.sh b/scripts/diagnostic-logger.sh
index 91aabab..dd58fa0 100644
--- a/scripts/diagnostic-logger.sh
+++ b/scripts/diagnostic-logger.sh
@@ -118,7 +118,7 @@ check_service_status() {
     fi
 
     # Check if service responds to HTTP requests
-    if [ "$port" = "4000" ]; then
+    if [ "$port" = "4500" ]; then
         if timeout 3 curl -s http://localhost:${port}/api/health > /dev/null 2>&1; then
             diag_log "INFO" "HTTP endpoint responding"
         else
diff --git a/scripts/entrypoint.sh b/scripts/entrypoint.sh
index ddf67c7..9186e03 100755
--- a/scripts/entrypoint.sh
+++ b/scripts/entrypoint.sh
@@ -172,7 +172,7 @@ log "Starting Shopify AI App Builder service and ttyd..."
 # /opt/webchat_v2 is just a wrapper and causes module loading failures
 CHAT_APP_DIR="${CHAT_APP_DIR:-/opt/webchat}"
 CHAT_APP_FALLBACK="/opt/webchat_v2"
-CHAT_PORT="${CHAT_PORT:-4000}"
+CHAT_PORT="${CHAT_PORT:-4500}"
 CHAT_HOST="${CHAT_HOST:-0.0.0.0}"
 ACCESS_PASSWORD="${ACCESS_PASSWORD:-}"
 
@@ -376,6 +376,6 @@ fi
 
 # Start ttyd proxy instead of ttyd directly (on-demand activation)
 log "Starting ttyd proxy (on-demand mode)"
-log "ttyd will only run when port 4001 is accessed"
+    log "ttyd will only run when port 4501 is accessed"
 log "Idle timeout: 5 minutes of inactivity"
 exec node /usr/local/bin/ttyd-proxy.js
diff --git a/scripts/healthcheck.sh b/scripts/healthcheck.sh
index b23a1ec..d7e07b3 100644
--- a/scripts/healthcheck.sh
+++ b/scripts/healthcheck.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 # Enhanced health check script for Shopify AI App Builder container
-# Checks both ttyd (port 4001) and chat service (port 4000)
+# Checks both ttyd (port 4501) and chat service (port 4500)
 # Provides detailed diagnostics for debugging
 
 set -e
@@ -158,33 +158,33 @@ main() {
     # Check system resources
     check_resources
 
-    # Check chat service (port 4000)
-    health_log "INFO" "=== Chat Service (port 4000) ==="
-    if ! check_port 4000 "chat service"; then
+    # Check chat service (port 4500)
+    health_log "INFO" "=== Chat Service (port 4500) ==="
+    if ! check_port 4500 "chat service"; then
         exit_code=1
     fi
 
-    if ! check_http "http://localhost:4000/api/health" "chat service" 3; then
+    if ! check_http "http://localhost:4500/api/health" "chat service" 3; then
         exit_code=1
     fi
 
-    if ! check_process "chat service" 4000; then
+    if ! check_process "chat service" 4500; then
         exit_code=1
     fi
 
-    # Check ttyd service (port 4001) - proxy running, ttyd starts on-demand
-    health_log "INFO" "=== TTYD Proxy Service (port 4001) ==="
-    if ! check_port 4001 "ttyd-proxy"; then
+    # Check ttyd service (port 4501) - proxy running, ttyd starts on-demand
+    health_log "INFO" "=== TTYD Proxy Service (port 4501) ==="
+    if ! check_port 4501 "ttyd-proxy"; then
         exit_code=1
     fi
 
     # Check if proxy responds ( ttyd may not be running yet - that's OK )
-    if ! check_http "http://localhost:4001/" "ttyd-proxy" 10; then
+    if ! check_http "http://localhost:4501/" "ttyd-proxy" 10; then
         exit_code=1
     fi
 
     # Check proxy process (not ttyd - ttyd starts on-demand)
-    if ! check_process "ttyd-proxy" 4001; then
+    if ! check_process "ttyd-proxy" 4501; then
         exit_code=1
     fi
 
diff --git a/stack-portainer.yml b/stack-portainer.yml
index 30b1d0b..7ec4aeb 100644
--- a/stack-portainer.yml
+++ b/stack-portainer.yml
@@ -7,8 +7,8 @@ services:
       # Portainer automatically detects host architecture and passes TARGETARCH to Dockerfile
       # This enables reliable multi-architecture builds (amd64, arm64, etc.)
     ports:
-      - "4001:4001"
-      - "4000:4000"
+      - "4501:4501"
+      - "4500:4500"
     restart: unless-stopped
     environment:
       - OPENCODE_API_KEY=${OPENCODE_API_KEY:-}