diff --git a/setup.sh b/setup.sh
index 78df53a..c6758a8 100755
--- a/setup.sh
+++ b/setup.sh
@@ -4,6 +4,7 @@ set -euo pipefail
 REPO_URL="https://github.com/SantosFC/chamado-health.git"
 INSTALL_DIR="${HOME}/src/chamado-health"
 CONFIG_FILE="${HOME}/.config/chamado-health"
+INTERVAL="${HEALTHCHECK_INTERVAL:-1min}"
 
 if [[ -z "${HEALTHCHECK_URL:-}" ]]; then
     read -rp "HEALTHCHECK_URL: " HEALTHCHECK_URL </dev/tty
@@ -18,6 +19,11 @@ fi
 echo "HEALTHCHECK_URL=${HEALTHCHECK_URL}" > "${CONFIG_FILE}"
 echo "Config saved to ${CONFIG_FILE}."
 
+sed -i "s/OnUnitActiveSec=.*/OnUnitActiveSec=${INTERVAL}/" \
+    "${INSTALL_DIR}/systemd/chamado-health.timer"
+sed -i "s/OnBootSec=.*/OnBootSec=${INTERVAL}/" \
+    "${INSTALL_DIR}/systemd/chamado-health.timer"
+
 bash "${INSTALL_DIR}/install_systemd.sh"
 
 loginctl enable-linger