diff --git a/pkg/backup.go b/pkg/backup.go
index 926a909ab..151c57457 100644
--- a/pkg/backup.go
+++ b/pkg/backup.go
@@ -18,6 +18,7 @@ package pkg
 
 import (
 	"context"
+	"fmt"
 	"path/filepath"
 	"strings"
 
@@ -212,6 +213,10 @@ func (opt *mysqlOptions) backupMySQL(targetRef api_v1beta1.TargetRef) (*restic.B
 			"-h", appBinding.Spec.ClientConfig.Service.Name,
 		},
 	}
+	// if port is specified, append port in the arguments
+	if appBinding.Spec.ClientConfig.Service.Port != 0 {
+		opt.backupOptions.StdinPipeCommand.Args = append(opt.backupOptions.StdinPipeCommand.Args, fmt.Sprintf("--port=%d", appBinding.Spec.ClientConfig.Service.Port))
+	}
 	for _, arg := range strings.Fields(opt.myArgs) {
 		opt.backupOptions.StdinPipeCommand.Args = append(opt.backupOptions.StdinPipeCommand.Args, arg)
 	}
diff --git a/pkg/restore.go b/pkg/restore.go
index 45f1f0c93..19e544607 100644
--- a/pkg/restore.go
+++ b/pkg/restore.go
@@ -18,6 +18,7 @@ package pkg
 
 import (
 	"context"
+	"fmt"
 	"path/filepath"
 	"strings"
 
@@ -181,6 +182,10 @@ func (opt *mysqlOptions) restoreMySQL(targetRef api_v1beta1.TargetRef) (*restic.
 			"-h", appBinding.Spec.ClientConfig.Service.Name,
 		},
 	}
+	// if port is specified, append port in the arguments
+	if appBinding.Spec.ClientConfig.Service.Port != 0 {
+		opt.dumpOptions.StdoutPipeCommand.Args = append(opt.dumpOptions.StdoutPipeCommand.Args, fmt.Sprintf("--port=%d", appBinding.Spec.ClientConfig.Service.Port))
+	}
 	for _, arg := range strings.Fields(opt.myArgs) {
 		opt.dumpOptions.StdoutPipeCommand.Args = append(opt.dumpOptions.StdoutPipeCommand.Args, arg)
 	}
diff --git a/pkg/utils.go b/pkg/utils.go
index 25c7da586..cb9c35bcb 100644
--- a/pkg/utils.go
+++ b/pkg/utils.go
@@ -66,5 +66,8 @@ func waitForDBReady(appBinding *v1alpha1.AppBinding, secret *core.Secret, waitTi
 		"--user=root",
 		fmt.Sprintf("--wait=%d", waitTimeout),
 	}
+	if appBinding.Spec.ClientConfig.Service.Port != 0 {
+		args = append(args, fmt.Sprintf("--port=%d", appBinding.Spec.ClientConfig.Service.Port))
+	}
 	return shell.Command("mysqladmin", args...).Run()
 }