diff --git a/README.md b/README.md
index fca14ab..1a502fc 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,8 @@
 This fork changes:
 * adds MarshalBSON and UnmarshalBSON (for official mongo dirver)
 * sets MarshalJSONWithoutQuotes=true
+* adds decoder and encoder functions for official mongo driver
+* adds go.mod
 
 [![Github Actions](https://github.com/shopspring/decimal/actions/workflows/ci.yml/badge.svg)](https://github.com/shopspring/decimal/actions/workflows/ci.yml)
 [![GoDoc](https://godoc.org/github.com/shopspring/decimal?status.svg)](https://godoc.org/github.com/shopspring/decimal)
diff --git a/go.mod b/go.mod
index ae1b7aa..49f73b1 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,10 @@
-module github.com/shopspring/decimal
+module github.com/husarlabs/decimal
 
-go 1.13
+go 1.15
+
+require (
+	go.mongodb.org/mongo-driver v1.12.1
+	gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c // indirect
+	gopkg.in/mgo.v2 v2.0.0-20190816093944-a6b53ec6cb22
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..f3d5d47
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,56 @@
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/golang/snappy v0.0.1/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/google/go-cmp v0.5.2 h1:X2ev0eStA3AbceY54o37/0PQ/UWqKEiiO2dKL5OPaFM=
+github.com/google/go-cmp v0.5.2/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
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+github.com/kr/text v0.1.0 h1:45sCR5RtlFHMR4UwH9sdQ5TC8v0qDQCHnXt+kaKSTVE=
+github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
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+go.mongodb.org/mongo-driver v1.12.1/go.mod h1:/rGBTebI3XYboVmgz+Wv3Bcbl3aD0QF9zl6kDDw18rQ=
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+golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
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diff --git a/mongo.go b/mongo.go
new file mode 100644
index 0000000..7e381c5
--- /dev/null
+++ b/mongo.go
@@ -0,0 +1,25 @@
+package decimal
+
+import (
+	"reflect"
+
+	"go.mongodb.org/mongo-driver/bson/bsoncodec"
+	"go.mongodb.org/mongo-driver/bson/bsonrw"
+)
+
+func Encoder(encodeContext bsoncodec.EncodeContext, writer bsonrw.ValueWriter, value reflect.Value) error {
+	return writer.WriteString(value.Interface().(Decimal).String())
+}
+
+func Decoder(decodeContext bsoncodec.DecodeContext, reader bsonrw.ValueReader, value reflect.Value) error {
+	str, err := reader.ReadString()
+	if err != nil {
+		return err
+	}
+	dec, err := NewFromString(str)
+	if err != nil {
+		return err
+	}
+	value.Set(reflect.ValueOf(dec))
+	return nil
+}