diff --git a/k8s/cronjobs/mysql-dump-cronjob-daily.yml b/k8s/cronjobs/mysql-dump-cronjob-daily.yml
index 35f6738a9f6bc781a9e27251f1b555ec4bd3cef9..bb68b31089ce16bfda3ef52a0e9aff1fb663598e 100644
--- a/k8s/cronjobs/mysql-dump-cronjob-daily.yml
+++ b/k8s/cronjobs/mysql-dump-cronjob-daily.yml
@@ -45,6 +45,6 @@ spec:
                 - >-
                   mkdir -p /dump/daily;
                   cd /dump/daily;
-                  mysqldump -h$(DATABASE_HOST) -uroot -p'$(MYSQL_ROOT_PASSWORD)' $(MYSQL_DATABASE) | gzip > $(date'+%Y-%m-%d_%H:%M:%S').sql.gz;
+                  mysqldump -h"$DATABASE_HOST" -uroot -p"$MYSQL_ROOT_PASSWORD" "$MYSQL_DATABASE" | gzip > $(date '+%Y-%m-%d_%H:%M:%S').sql.gz;
                   ls -F *.sql.gz | head -n -14 | xargs -r rm
           restartPolicy: OnFailure
diff --git a/k8s/cronjobs/mysql-dump-cronjob-hourly.yml b/k8s/cronjobs/mysql-dump-cronjob-hourly.yml
index bcb25fa216cf03aaa54c8f3089413f6a784b873e..78f20e8e7bc666dffb0cdba490409ca95dab963b 100644
--- a/k8s/cronjobs/mysql-dump-cronjob-hourly.yml
+++ b/k8s/cronjobs/mysql-dump-cronjob-hourly.yml
@@ -45,6 +45,6 @@ spec:
                 - >-
                   mkdir -p /dump/hourly;
                   cd /dump/hourly;
-                  mysqldump -h$(DATABASE_HOST) -uroot -p'$(MYSQL_ROOT_PASSWORD)' $(MYSQL_DATABASE) | gzip > $(date'+%Y-%m-%d_%H:%M:%S').sql.gz;
+                  mysqldump -h"$DATABASE_HOST" -uroot -p"$MYSQL_ROOT_PASSWORD" "$MYSQL_DATABASE" | gzip > $(date '+%Y-%m-%d_%H:%M:%S').sql.gz;
                   ls -F *.sql.gz | head -n -72 | xargs -r rm
           restartPolicy: OnFailure
diff --git a/k8s/cronjobs/mysql-dump-cronjob-weekly.yml b/k8s/cronjobs/mysql-dump-cronjob-weekly.yml
index 3c448785303a7d3128fdb13007f700115656076a..d9ed4c56ef3cbe908e1df51c944c192971a85876 100644
--- a/k8s/cronjobs/mysql-dump-cronjob-weekly.yml
+++ b/k8s/cronjobs/mysql-dump-cronjob-weekly.yml
@@ -45,6 +45,6 @@ spec:
                 - >-
                   mkdir -p /dump/weekly;
                   cd /dump/weekly;
-                  mysqldump -h$(DATABASE_HOST) -uroot -p'$(MYSQL_ROOT_PASSWORD)' $(MYSQL_DATABASE) | gzip > $(date'+%Y-%m-%d_%H:%M:%S').sql.gz;
+                  mysqldump -h"$DATABASE_HOST" -uroot -p"$MYSQL_ROOT_PASSWORD" "$MYSQL_DATABASE" | gzip > $(date '+%Y-%m-%d_%H:%M:%S').sql.gz;
                   ls -F *.sql.gz | head -n -14 | xargs -r rm
           restartPolicy: OnFailure