diff --git a/build.sh b/build.sh
index 9ea7cf9..95a100d 100755
--- a/build.sh
+++ b/build.sh
@@ -35,11 +35,26 @@ mkdir -p "$WHEELS_DIR" "$STAGE_DIR" "$DIST_DIR"
 # --- Step 1: Download wheel packages ---
 echo "[1/4] Downloading dependencies as wheel packages..."
 
+# Download wheels for multiple Python versions to support different servers
+PYTHON_VERSIONS="39 310 311 312 313 314"
+echo "  Downloading for Python versions: ${PYTHON_VERSIONS}"
+
+for pyver in $PYTHON_VERSIONS; do
+    python3 -m pip download \
+        -r "$SCRIPT_DIR/requirements.txt" \
+        --dest "$WHEELS_DIR" \
+        --python-version "$pyver" \
+        --only-binary=:all: \
+        --quiet 2>/dev/null || true
+done
+
+# Also download pure-python wheels (no version constraint)
 python3 -m pip download \
     -r "$SCRIPT_DIR/requirements.txt" \
     --dest "$WHEELS_DIR" \
-    --quiet
+    --quiet 2>/dev/null || true
 
+# Deduplicate (same file may be downloaded multiple times)
 WHEEL_COUNT=$(find "$WHEELS_DIR" -type f | wc -l)
 echo "  Downloaded $WHEEL_COUNT packages:"
 find "$WHEELS_DIR" -type f -printf "    %f\n" | sort
@@ -84,6 +99,22 @@ cat > "$STAGE_DIR/install.sh" << 'INSTALL_SCRIPT'
 # =============================================================================
 set -euo pipefail
 
+# --- Check Python version ---
+PYTHON_VERSION=$(python3 -c 'import sys; print(f"{sys.version_info.major}.{sys.version_info.minor}")' 2>/dev/null || echo "0.0")
+PYTHON_MAJOR=$(echo "$PYTHON_VERSION" | cut -d. -f1)
+PYTHON_MINOR=$(echo "$PYTHON_VERSION" | cut -d. -f2)
+
+if [ "$PYTHON_MAJOR" -lt 3 ] || { [ "$PYTHON_MAJOR" -eq 3 ] && [ "$PYTHON_MINOR" -lt 10 ]; }; then
+    echo "ERROR: Python 3.10+ required, found Python ${PYTHON_VERSION}" >&2
+    echo "" >&2
+    echo "Install Python 3.10+:" >&2
+    echo "  RHEL/CentOS: yum install python3.11" >&2
+    echo "  ALT Linux:   apt-get install python3" >&2
+    echo "  Debian:      apt install python3.11" >&2
+    exit 1
+fi
+echo "Python version: ${PYTHON_VERSION} (OK)"
+
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
 INSTALL_DIR="/opt/airflow-monitor"
 SERVICE_USER="$(whoami)"