diff --git a/vault/logical_system.go b/vault/logical_system.go
index 9769a882bd..6673226d0a 100644
--- a/vault/logical_system.go
+++ b/vault/logical_system.go
@@ -110,7 +110,7 @@ func NewSystemBackend(core *Core) logical.Backend {
 						Description: strings.TrimSpace(sysHelp["lease_id"][0]),
 					},
 					"increment": &framework.FieldSchema{
-						Type:        framework.TypeInt,
+						Type:        framework.TypeDurationSecond,
 						Description: strings.TrimSpace(sysHelp["increment"][0]),
 					},
 				},
diff --git a/vault/logical_system_test.go b/vault/logical_system_test.go
index b3ba308b62..fd23f59aa4 100644
--- a/vault/logical_system_test.go
+++ b/vault/logical_system_test.go
@@ -181,7 +181,7 @@ func TestSystemBackend_renew(t *testing.T) {
 
 	// Attempt renew
 	req2 := logical.TestRequest(t, logical.WriteOperation, "renew/"+resp.Secret.LeaseID)
-	req2.Data["increment"] = 100
+	req2.Data["increment"] = "100s"
 	resp2, err := b.HandleRequest(req2)
 	if err != logical.ErrInvalidRequest {
 		t.Fatalf("err: %v", err)
diff --git a/vault/token_store.go b/vault/token_store.go
index 98845aa53c..03f278c83c 100644
--- a/vault/token_store.go
+++ b/vault/token_store.go
@@ -211,7 +211,7 @@ func NewTokenStore(c *Core) (*TokenStore, error) {
 						Description: "Token to renew",
 					},
 					"increment": &framework.FieldSchema{
-						Type:        framework.TypeInt,
+						Type:        framework.TypeDurationSecond,
 						Description: "The desired increment in seconds to the token expiration",
 					},
 				},
diff --git a/vault/token_store_test.go b/vault/token_store_test.go
index 3c887e233a..2abea5cbf9 100644
--- a/vault/token_store_test.go
+++ b/vault/token_store_test.go
@@ -822,7 +822,7 @@ func TestTokenStore_HandleRequest_Renew(t *testing.T) {
 
 	beforeRenew := time.Now().UTC()
 	req := logical.TestRequest(t, logical.WriteOperation, "renew/"+root.ID)
-	req.Data["increment"] = "3600"
+	req.Data["increment"] = "3600s"
 	resp, err := ts.HandleRequest(req)
 	if err != nil {
 		t.Fatalf("err: %v %v", err, resp)