diff --git a/action.go b/action.go
index 895bef6..59d9862 100644
--- a/action.go
+++ b/action.go
@@ -2,6 +2,7 @@ package tdb
 
 import (
 	"path/filepath"
+	"time"
 )
 
 const (
@@ -44,6 +45,35 @@ func (db *TDB) GetActions() ([]string, []uint32, []uint32, error) {
 	return targets, starts, lasts, nil
 }
 
+// CheckExpirations to check expired actions
+func (db *TDB) CheckExpirations() error {
+	targets, starts, lasts, err := db.GetActions()
+	if err != nil {
+		return err
+	}
+
+	changed := false
+	now := uint32(time.Now().Unix())
+
+	db.action.contentLock.Lock()
+	for i := 0; i < len(lasts); i++ {
+		if now-lasts[i] > actionExp {
+			changed = true
+			if err := db.AddSlot(targets[i], starts[i], lasts[i]-starts[i]); err != nil {
+				db.action.contentLock.Unlock()
+				return err
+			}
+			delete(db.action.content, targets[i])
+		}
+	}
+	db.action.contentLock.Unlock()
+
+	if changed {
+		return db.action.writeToDisk()
+	}
+	return nil
+}
+
 func handleAction(db *TDB, target string, active bool, ts uint32) error {
 	actions := db.action.content
 	v := actions[target]
diff --git a/action_test.go b/action_test.go
index b551279..8261a57 100644
--- a/action_test.go
+++ b/action_test.go
@@ -33,6 +33,8 @@ func TestActions(t *testing.T) {
 	assert.Len(t, targets, 1, "targets count wrong")
 	assert.Len(t, allStarts, 1, "starts count wrong")
 	assert.Len(t, allLasts, 1, "lasts count wrong")
+
+	testCheckEXP(t, db)
 }
 
 func testNormalCloseAction(t *testing.T, db *TDB) {
@@ -134,3 +136,28 @@ func testLaterActiveAction(t *testing.T, db *TDB) {
 	assert.Len(t, allStarts, 1, "starts count wrong")
 	assert.Len(t, allLasts, 1, "lasts count wrong")
 }
+
+func testCheckEXP(t *testing.T, db *TDB) {
+	var keys []string
+	for k := range db.action.content {
+		keys = append(keys, k)
+	}
+	for i := 0; i < len(keys); i++ {
+		delete(db.action.content, keys[i])
+	}
+
+	target := string(randBytes(6))
+	now := uint32(time.Now().Unix())
+
+	err := db.AddAction(target, true, now-actionExp-2)
+	assert.NoError(t, err, "error add an action")
+
+	err = db.CheckExpirations()
+	assert.NoError(t, err, "error check expiration")
+
+	targets, allStarts, allLasts, err := db.GetActions()
+	assert.NoError(t, err, "get all actions wrong")
+	assert.Len(t, targets, 0, "targets count wrong")
+	assert.Len(t, allStarts, 0, "starts count wrong")
+	assert.Len(t, allLasts, 0, "lasts count wrong")
+}
diff --git a/glide.lock b/glide.lock
index 634ca63..cde107f 100644
--- a/glide.lock
+++ b/glide.lock
@@ -1,5 +1,5 @@
 hash: 9a15fec9a582da416c578cf88651edde1ee74b87efe6cd4e1b4716f73b7b7e99
-updated: 2017-04-13T22:48:51.355626295+08:00
+updated: 2017-04-24T12:20:28.2983702+08:00
 imports:
 - name: github.com/drkaka/ulid
   version: a4078d88d430f7f5c443e60820664d0eef7a1cc8
@@ -14,7 +14,7 @@ imports:
   subpackages:
   - context
 - name: golang.org/x/sync
-  version: 5a06fca2c336a4b2b2fcb45702e8c47621b2aa2c
+  version: de49d9dcd27d4f764488181bea099dfe6179bcf0
   subpackages:
   - errgroup
 testImports:
@@ -23,7 +23,7 @@ testImports:
   subpackages:
   - spew
 - name: github.com/mattn/goveralls
-  version: a99c5ee06aeeca2a2befc7e90b99061b1180850c
+  version: 9d621f6940639bf287ecbb6f585a2c26eeba3bbe
 - name: github.com/pborman/uuid
   version: 1b00554d822231195d1babd97ff4a781231955c9
 - name: github.com/pmezard/go-difflib
@@ -35,6 +35,6 @@ testImports:
   subpackages:
   - assert
 - name: golang.org/x/tools
-  version: 9bf174b4d3fab31065b140e4a69c6e6b17746806
+  version: c853fd576988aeebd3665f6224972f1379960013
   subpackages:
   - cover