diff --git a/go.mod b/go.mod
index be081cb3..42465bb4 100644
--- a/go.mod
+++ b/go.mod
@@ -17,7 +17,7 @@ require (
 	github.com/onsi/ginkgo v1.12.0 // indirect
 	github.com/onsi/gomega v1.9.0 // indirect
 	github.com/stretchr/testify v1.4.0 // indirect
-	github.com/tidwall/buntdb v1.2.10
+	github.com/tidwall/buntdb v1.3.1
 	github.com/toorop/go-dkim v0.0.0-20201103131630-e1cd1a0a5208
 	github.com/xdg-go/scram v1.0.2
 	golang.org/x/crypto v0.17.0
diff --git a/go.sum b/go.sum
index 18122e11..34a2a576 100644
--- a/go.sum
+++ b/go.sum
@@ -49,6 +49,8 @@ github.com/tidwall/btree v1.4.2 h1:PpkaieETJMUxYNADsjgtNRcERX7mGc/GP2zp/r5FM3g=
 github.com/tidwall/btree v1.4.2/go.mod h1:LGm8L/DZjPLmeWGjv5kFrY8dL4uVhMmzmmLYmsObdKE=
 github.com/tidwall/buntdb v1.2.10 h1:U/ebfkmYPBnyiNZIirUiWFcxA/mgzjbKlyPynFsPtyM=
 github.com/tidwall/buntdb v1.2.10/go.mod h1:lZZrZUWzlyDJKlLQ6DKAy53LnG7m5kHyrEHvvcDmBpU=
+github.com/tidwall/buntdb v1.3.1 h1:HKoDF01/aBhl9RjYtbaLnvX9/OuenwvQiC3OP1CcL4o=
+github.com/tidwall/buntdb v1.3.1/go.mod h1:lZZrZUWzlyDJKlLQ6DKAy53LnG7m5kHyrEHvvcDmBpU=
 github.com/tidwall/gjson v1.12.1/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
 github.com/tidwall/gjson v1.14.3 h1:9jvXn7olKEHU1S9vwoMGliaT8jq1vJ7IH/n9zD9Dnlw=
 github.com/tidwall/gjson v1.14.3/go.mod h1:/wbyibRr2FHMks5tjHJ5F8dMZh3AcwJEMf5vlfC0lxk=
diff --git a/vendor/github.com/tidwall/buntdb/buntdb.go b/vendor/github.com/tidwall/buntdb/buntdb.go
index 9b39e5c2..4f7a6d98 100644
--- a/vendor/github.com/tidwall/buntdb/buntdb.go
+++ b/vendor/github.com/tidwall/buntdb/buntdb.go
@@ -61,6 +61,8 @@ var (
 	ErrTxIterating = errors.New("tx is iterating")
 )
 
+const useAbsEx = true
+
 // DB represents a collection of key-value pairs that persist on disk.
 // Transactions are used for all forms of data access to the DB.
 type DB struct {
@@ -895,24 +897,35 @@ func (db *DB) readLoad(rd io.Reader, modTime time.Time) (n int64, err error) {
 				return totalSize, ErrInvalid
 			}
 			if len(parts) == 5 {
-				if strings.ToLower(parts[3]) != "ex" {
+				arg := strings.ToLower(parts[3])
+				if arg != "ex" && arg != "ae" {
 					return totalSize, ErrInvalid
 				}
-				ex, err := strconv.ParseUint(parts[4], 10, 64)
+				ex, err := strconv.ParseInt(parts[4], 10, 64)
 				if err != nil {
 					return totalSize, err
 				}
+				var exat time.Time
 				now := time.Now()
-				dur := (time.Duration(ex) * time.Second) - now.Sub(modTime)
-				if dur > 0 {
+				if arg == "ex" {
+					dur := (time.Duration(ex) * time.Second) - now.Sub(modTime)
+					exat = now.Add(dur)
+				} else {
+					exat = time.Unix(ex, 0)
+				}
+				if exat.After(now) {
 					db.insertIntoDatabase(&dbItem{
 						key: parts[1],
 						val: parts[2],
 						opts: &dbItemOpts{
 							ex:   true,
-							exat: now.Add(dur),
+							exat: exat,
 						},
 					})
+				} else {
+					db.deleteFromDatabase(&dbItem{
+						key: parts[1],
+					})
 				}
 			} else {
 				db.insertIntoDatabase(&dbItem{key: parts[1], val: parts[2]})
@@ -1330,13 +1343,19 @@ func appendBulkString(buf []byte, s string) []byte {
 // writeSetTo writes an item as a single SET record to the a bufio Writer.
 func (dbi *dbItem) writeSetTo(buf []byte, now time.Time) []byte {
 	if dbi.opts != nil && dbi.opts.ex {
-		ex := dbi.opts.exat.Sub(now) / time.Second
 		buf = appendArray(buf, 5)
 		buf = appendBulkString(buf, "set")
 		buf = appendBulkString(buf, dbi.key)
 		buf = appendBulkString(buf, dbi.val)
-		buf = appendBulkString(buf, "ex")
-		buf = appendBulkString(buf, strconv.FormatUint(uint64(ex), 10))
+		if useAbsEx {
+			ex := dbi.opts.exat.Unix()
+			buf = appendBulkString(buf, "ae")
+			buf = appendBulkString(buf, strconv.FormatUint(uint64(ex), 10))
+		} else {
+			ex := dbi.opts.exat.Sub(now) / time.Second
+			buf = appendBulkString(buf, "ex")
+			buf = appendBulkString(buf, strconv.FormatUint(uint64(ex), 10))
+		}
 	} else {
 		buf = appendArray(buf, 3)
 		buf = appendBulkString(buf, "set")
@@ -1622,6 +1641,9 @@ func (tx *Tx) scan(desc, gt, lt bool, index, start, stop string,
 	// wrap a btree specific iterator around the user-defined iterator.
 	iter := func(item interface{}) bool {
 		dbi := item.(*dbItem)
+		if dbi.expired() {
+			return true
+		}
 		return iterator(dbi.key, dbi.val)
 	}
 	var tr *btree.BTree
diff --git a/vendor/modules.txt b/vendor/modules.txt
index 9004bf25..77a51768 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -48,7 +48,7 @@ github.com/okzk/sdnotify
 # github.com/tidwall/btree v1.4.2
 ## explicit; go 1.18
 github.com/tidwall/btree
-# github.com/tidwall/buntdb v1.2.10
+# github.com/tidwall/buntdb v1.3.1
 ## explicit; go 1.18
 github.com/tidwall/buntdb
 # github.com/tidwall/gjson v1.14.3