diff --git a/run_node.sh b/run_node.sh
index 27d1728..3e03b26 100755
--- a/run_node.sh
+++ b/run_node.sh
@@ -56,6 +56,8 @@ fi
 if [ -n "${DOMAIN}" ]; then
     ## A domain has been either set or inferred. Let's try to use it for websocket secure support.
 
+    apk add --no-cache openssl
+
     LETSENCRYPT_PATH="/etc/letsencrypt/live/${DOMAIN}"
     CERT="${LETSENCRYPT_PATH}/fullchain.pem"
     KEY="${LETSENCRYPT_PATH}/privkey.pem"
@@ -63,12 +65,10 @@ if [ -n "${DOMAIN}" ]; then
     echo "[INFO] Waiting for a valid TLS certificate for ${DOMAIN}..."
 
     while true; do
-        MIN_VALIDITY=3600  # 1 hour
-
         if [ ! -f "${CERT}" ] || [ ! -f "${KEY}" ]; then
             echo "[INFO] Certificate files not found yet. Waiting..."
-        elif ! openssl x509 -checkend "${MIN_VALIDITY}" -noout -in "${CERT}" >/dev/null 2>&1; then
-            echo "[WARN] Certificate is invalid, expired, or expiring soon. Waiting..."
+        elif ! openssl x509 -checkend 0 -noout -in "${CERT}" >/dev/null 2>&1; then
+            echo "[WARN] Certificate exists but is expired. Waiting for renewal..."
         else
             echo "[INFO] Valid TLS certificate detected."
             break