diff --git a/scripts/backup-to-nas.sh b/scripts/backup-to-nas.sh
index 6b89a41..2162607 100644
--- a/scripts/backup-to-nas.sh
+++ b/scripts/backup-to-nas.sh
@@ -25,7 +25,9 @@ PROJECT_ROOT="$(cd "${SCRIPT_DIR}/.." && pwd)"
 ENV_FILE="${PROJECT_ROOT}/.env"
 if [ -f "${ENV_FILE}" ]; then
     set -a
+    set +u
     source "${ENV_FILE}"
+    set -u
     set +a
 else
     echo "ERROR: .env introuvable : ${ENV_FILE}" >&2
diff --git a/scripts/disaster-recovery.sh b/scripts/disaster-recovery.sh
index a4c3a92..855fef6 100755
--- a/scripts/disaster-recovery.sh
+++ b/scripts/disaster-recovery.sh
@@ -34,7 +34,9 @@ log_error() { echo -e "[DR ${TIMESTAMP}] ${RED}ERROR: $1${NC}"; }
 ENV_FILE="${PROJECT_ROOT}/.env"
 if [ -f "${ENV_FILE}" ]; then
     set -a
+    set +u
     source "${ENV_FILE}"
+    set -u
     set +a
 fi
 
diff --git a/scripts/npm-failover.sh b/scripts/npm-failover.sh
index 500f29d..d55b0e4 100644
--- a/scripts/npm-failover.sh
+++ b/scripts/npm-failover.sh
@@ -35,7 +35,9 @@ log_info()    { echo -e "[NPM-Failover ${TIMESTAMP}] ${BLUE}$1${NC}"; }
 ENV_FILE="${PROJECT_ROOT}/.env"
 if [ -f "${ENV_FILE}" ]; then
     set -a
+    set +u
     source "${ENV_FILE}"
+    set -u
     set +a
 fi
 
diff --git a/scripts/setup-nas.sh b/scripts/setup-nas.sh
index 2012ad8..8aa59ec 100644
--- a/scripts/setup-nas.sh
+++ b/scripts/setup-nas.sh
@@ -49,7 +49,9 @@ fi
 ENV_FILE="${PROJECT_ROOT}/.env"
 if [ -f "${ENV_FILE}" ]; then
     set -a
+    set +u
     source "${ENV_FILE}"
+    set -u
     set +a
 fi
 
diff --git a/scripts/verify-backups.sh b/scripts/verify-backups.sh
index d09fd18..d4f29fe 100644
--- a/scripts/verify-backups.sh
+++ b/scripts/verify-backups.sh
@@ -38,7 +38,9 @@ log_error()   { echo -e "[Verify ${TIMESTAMP}] ${RED}❌ ERROR: $1${NC}"; }
 ENV_FILE="${PROJECT_ROOT}/.env"
 if [ -f "${ENV_FILE}" ]; then
     set -a
+    set +u
     source "${ENV_FILE}"
+    set -u
     set +a
 fi