diff --git a/go.mod b/go.mod
index bd0861d..22c6f35 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/vicanso/cod-json-picker
 
 require (
-	github.com/vicanso/cod v0.0.2
+	github.com/vicanso/cod v0.0.7
 	github.com/vicanso/superjson v0.0.4
 )
diff --git a/go.sum b/go.sum
index 8de6aaf..324aa00 100644
--- a/go.sum
+++ b/go.sum
@@ -1,13 +1,20 @@
+github.com/davecgh/go-spew v1.1.0 h1:ZDRjVQ15GmhC3fiQ8ni8+OwkZQO4DARzQgrnXU1Liz8=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/julienschmidt/httprouter v1.2.0 h1:TDTW5Yz1mjftljbcKqRcrYhd4XeOoI98t+9HbQbYf7g=
 github.com/julienschmidt/httprouter v1.2.0/go.mod h1:SYymIcj16QtmaHHD7aYtjjsJG7VTCxuUUipMqKk8s4w=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/testify v1.3.0 h1:TivCn/peBQ7UY8ooIcPgZFpTNSz0Q2U6UrFlUfqbe0Q=
+github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/tidwall/gjson v1.1.5 h1:QysILxBeUEY3GTLA0fQVgkQG1zme8NxGvhh2SSqWNwI=
 github.com/tidwall/gjson v1.1.5/go.mod h1:c/nTNbUr0E0OrXEhq1pwa8iEgc2DOt4ZZqAt1HtCkPA=
 github.com/tidwall/match v1.0.1 h1:PnKP62LPNxHKTwvHHZZzdOAOCtsJTjo6dZLCwpKm5xc=
 github.com/tidwall/match v1.0.1/go.mod h1:LujAq0jyVjBy028G1WhWfIzbpQfMO8bBZ6Tyb0+pL9E=
-github.com/vicanso/cod v0.0.2 h1:bTGMY9Qp4R+rsgFXXSexmt3GSAcxL/zyxRhRfaSlRcQ=
-github.com/vicanso/cod v0.0.2/go.mod h1:m+avmqlCzw472clYqSNtyNNm+BO3DW9OJCek23kSUUE=
-github.com/vicanso/hes v0.1.3 h1:3txPJL+J+xBRhIotkK3XKNbmBz+JXJ1knmGM0L+Qe4k=
-github.com/vicanso/hes v0.1.3/go.mod h1:bG0UJ3EihDKObFcLLwJYjxHHr9saFllsFcepyDIvFlo=
+github.com/vicanso/cod v0.0.7 h1:CHyIL7zkNOhEv0JosDDyRHCUALovry1P+dLISaANj1w=
+github.com/vicanso/cod v0.0.7/go.mod h1:tHGTs/JDTcp/OE4VaCutVMpYL69aR1rKUggsHviTuFc=
+github.com/vicanso/hes v0.1.4 h1:n8kG8krvNJF4Sj1PvZOEUzdUsmDSbCcGr8C1nYnoP+o=
+github.com/vicanso/hes v0.1.4/go.mod h1:bG0UJ3EihDKObFcLLwJYjxHHr9saFllsFcepyDIvFlo=
 github.com/vicanso/keygrip v0.1.0 h1:/zYzoVIbREAvaxSM7bo3/oSXuuYztaP71dPBfhRoNkM=
 github.com/vicanso/keygrip v0.1.0/go.mod h1:cI05iOjY00NJ7oH2Z9Zdm9eJPUkpoex3XnEubK78nho=
 github.com/vicanso/superjson v0.0.4 h1:k6PswKdSdEsuZ37g8UynYur+MMkkibBQVEYTOHNIuzA=