diff --git a/weed/filer2/cassandra/cassandra_store.go b/weed/filer2/cassandra/cassandra_store.go
index ebbaedc1d..d731cd99c 100644
--- a/weed/filer2/cassandra/cassandra_store.go
+++ b/weed/filer2/cassandra/cassandra_store.go
@@ -5,7 +5,6 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/gocql/gocql"
-	"github.com/spf13/viper"
 )
 
 func init() {
@@ -21,10 +20,10 @@ func (store *CassandraStore) GetName() string {
 	return "cassandra"
 }
 
-func (store *CassandraStore) Initialize(viper *viper.Viper) (err error) {
+func (store *CassandraStore) Initialize(configuration filer2.Configuration) (err error) {
 	return store.initialize(
-		viper.GetString("keyspace"),
-		viper.GetStringSlice("hosts"),
+		configuration.GetString("keyspace"),
+		configuration.GetStringSlice("hosts"),
 	)
 }
 
diff --git a/weed/filer2/configuration.go b/weed/filer2/configuration.go
index 46ed9e056..3c8a3675b 100644
--- a/weed/filer2/configuration.go
+++ b/weed/filer2/configuration.go
@@ -124,3 +124,13 @@ func (f *Filer) LoadConfiguration() {
 
 	os.Exit(-1)
 }
+
+// A simplified interface to decouple from Viper
+type Configuration interface {
+	GetString(key string) string
+	GetBool(key string) bool
+	GetInt(key string) int
+	GetInt64(key string) int64
+	GetFloat64(key string) float64
+	GetStringSlice(key string) []string
+}
diff --git a/weed/filer2/filerstore.go b/weed/filer2/filerstore.go
index 80822559b..55b565c4b 100644
--- a/weed/filer2/filerstore.go
+++ b/weed/filer2/filerstore.go
@@ -2,12 +2,12 @@ package filer2
 
 import (
 	"errors"
-	"github.com/spf13/viper"
 )
 
 type FilerStore interface {
 	GetName() string
-	Initialize(viper *viper.Viper) error
+	// Initialize initializes the file store
+	Initialize(configuration Configuration) error
 	InsertEntry(*Entry) error
 	UpdateEntry(*Entry) (err error)
 	FindEntry(FullPath) (entry *Entry, err error)
diff --git a/weed/filer2/leveldb/leveldb_store.go b/weed/filer2/leveldb/leveldb_store.go
index 58787714d..ac2fb0d66 100644
--- a/weed/filer2/leveldb/leveldb_store.go
+++ b/weed/filer2/leveldb/leveldb_store.go
@@ -7,7 +7,6 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	weed_util "github.com/chrislusf/seaweedfs/weed/util"
-	"github.com/spf13/viper"
 	"github.com/syndtr/goleveldb/leveldb"
 	leveldb_util "github.com/syndtr/goleveldb/leveldb/util"
 )
@@ -28,8 +27,8 @@ func (store *LevelDBStore) GetName() string {
 	return "leveldb"
 }
 
-func (store *LevelDBStore) Initialize(viper *viper.Viper) (err error) {
-	dir := viper.GetString("dir")
+func (store *LevelDBStore) Initialize(configuration filer2.Configuration) (err error) {
+	dir := configuration.GetString("dir")
 	return store.initialize(dir)
 }
 
diff --git a/weed/filer2/memdb/memdb_store.go b/weed/filer2/memdb/memdb_store.go
index a8ef5cb39..48a9bea31 100644
--- a/weed/filer2/memdb/memdb_store.go
+++ b/weed/filer2/memdb/memdb_store.go
@@ -4,7 +4,6 @@ import (
 	"fmt"
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/google/btree"
-	"github.com/spf13/viper"
 	"strings"
 )
 
@@ -28,7 +27,7 @@ func (store *MemDbStore) GetName() string {
 	return "memory"
 }
 
-func (store *MemDbStore) Initialize(viper *viper.Viper) (err error) {
+func (store *MemDbStore) Initialize(configuration filer2.Configuration) (err error) {
 	store.tree = btree.New(8)
 	return nil
 }
diff --git a/weed/filer2/mysql/mysql_store.go b/weed/filer2/mysql/mysql_store.go
index 475e4a642..6e0ca2b68 100644
--- a/weed/filer2/mysql/mysql_store.go
+++ b/weed/filer2/mysql/mysql_store.go
@@ -7,7 +7,6 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/filer2/abstract_sql"
 	_ "github.com/go-sql-driver/mysql"
-	"github.com/spf13/viper"
 )
 
 const (
@@ -26,15 +25,15 @@ func (store *MysqlStore) GetName() string {
 	return "mysql"
 }
 
-func (store *MysqlStore) Initialize(viper *viper.Viper) (err error) {
+func (store *MysqlStore) Initialize(configuration filer2.Configuration) (err error) {
 	return store.initialize(
-		viper.GetString("username"),
-		viper.GetString("password"),
-		viper.GetString("hostname"),
-		viper.GetInt("port"),
-		viper.GetString("database"),
-		viper.GetInt("connection_max_idle"),
-		viper.GetInt("connection_max_open"),
+		configuration.GetString("username"),
+		configuration.GetString("password"),
+		configuration.GetString("hostname"),
+		configuration.GetInt("port"),
+		configuration.GetString("database"),
+		configuration.GetInt("connection_max_idle"),
+		configuration.GetInt("connection_max_open"),
 	)
 }
 
diff --git a/weed/filer2/postgres/postgres_store.go b/weed/filer2/postgres/postgres_store.go
index 3bec55def..f5904ab21 100644
--- a/weed/filer2/postgres/postgres_store.go
+++ b/weed/filer2/postgres/postgres_store.go
@@ -7,7 +7,6 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/filer2/abstract_sql"
 	_ "github.com/lib/pq"
-	"github.com/spf13/viper"
 )
 
 const (
@@ -26,16 +25,16 @@ func (store *PostgresStore) GetName() string {
 	return "postgres"
 }
 
-func (store *PostgresStore) Initialize(viper *viper.Viper) (err error) {
+func (store *PostgresStore) Initialize(configuration filer2.Configuration) (err error) {
 	return store.initialize(
-		viper.GetString("username"),
-		viper.GetString("password"),
-		viper.GetString("hostname"),
-		viper.GetInt("port"),
-		viper.GetString("database"),
-		viper.GetString("sslmode"),
-		viper.GetInt("connection_max_idle"),
-		viper.GetInt("connection_max_open"),
+		configuration.GetString("username"),
+		configuration.GetString("password"),
+		configuration.GetString("hostname"),
+		configuration.GetInt("port"),
+		configuration.GetString("database"),
+		configuration.GetString("sslmode"),
+		configuration.GetInt("connection_max_idle"),
+		configuration.GetInt("connection_max_open"),
 	)
 }
 
diff --git a/weed/filer2/redis/redis_store.go b/weed/filer2/redis/redis_store.go
index 79a25096a..8bd158d8c 100644
--- a/weed/filer2/redis/redis_store.go
+++ b/weed/filer2/redis/redis_store.go
@@ -5,7 +5,6 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/filer2"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/go-redis/redis"
-	"github.com/spf13/viper"
 	"sort"
 	"strings"
 )
@@ -26,11 +25,11 @@ func (store *RedisStore) GetName() string {
 	return "redis"
 }
 
-func (store *RedisStore) Initialize(viper *viper.Viper) (err error) {
+func (store *RedisStore) Initialize(configuration filer2.Configuration) (err error) {
 	return store.initialize(
-		viper.GetString("address"),
-		viper.GetString("password"),
-		viper.GetInt("database"),
+		configuration.GetString("address"),
+		configuration.GetString("password"),
+		configuration.GetInt("database"),
 	)
 }