diff --git a/lock.go b/lock.go
index 244dceca83..17af55193f 100644
--- a/lock.go
+++ b/lock.go
@@ -7,7 +7,6 @@ package dep
 import (
 	"bytes"
 	"encoding/hex"
-	"encoding/json"
 	"fmt"
 	"io"
 	"sort"
@@ -25,17 +24,17 @@ type Lock struct {
 }
 
 type rawLock struct {
-	Memo string      `json:"memo"`
-	P    []lockedDep `json:"projects"`
+	Memo string
+	P    []lockedDep
 }
 
 type lockedDep struct {
-	Name     string   `json:"name"`
-	Version  string   `json:"version,omitempty"`
-	Branch   string   `json:"branch,omitempty"`
-	Revision string   `json:"revision"`
-	Source   string   `json:"source,omitempty"`
-	Packages []string `json:"packages"`
+	Name     string
+	Version  string
+	Branch   string
+	Revision string
+	Source   string
+	Packages []string
 }
 
 func readLock(r io.Reader) (*Lock, error) {
@@ -115,18 +114,6 @@ func (l *Lock) toRaw() rawLock {
 	return raw
 }
 
-func (l *Lock) MarshalJSON() ([]byte, error) {
-	raw := l.toRaw()
-
-	var buf bytes.Buffer
-	enc := json.NewEncoder(&buf)
-	enc.SetIndent("", "    ")
-	enc.SetEscapeHTML(false)
-	err := enc.Encode(raw)
-
-	return buf.Bytes(), err
-}
-
 func (l *Lock) MarshalTOML() (string, error) {
 	raw := l.toRaw()
 
diff --git a/manifest.go b/manifest.go
index f3e2e39468..5bf4b7ec36 100644
--- a/manifest.go
+++ b/manifest.go
@@ -5,7 +5,6 @@
 package dep
 
 import (
-	"bytes"
 	"encoding/json"
 	"fmt"
 	"io"
@@ -25,17 +24,10 @@ type Manifest struct {
 }
 
 type rawManifest struct {
-	Dependencies map[string]possibleProps `json:"dependencies,omitempty"`
-	Overrides    map[string]possibleProps `json:"overrides,omitempty"`
-	Ignores      []string                 `json:"ignores,omitempty"`
-	Required     []string                 `json:"required,omitempty"`
-}
-
-type possibleProps struct {
-	Branch   string `json:"branch,omitempty"`
-	Revision string `json:"revision,omitempty"`
-	Version  string `json:"version,omitempty"`
-	Source   string `json:"source,omitempty"`
+	Dependencies map[string]possibleProps
+	Overrides    map[string]possibleProps
+	Ignores      []string
+	Required     []string
 }
 
 func newRawManifest() rawManifest {
@@ -47,6 +39,13 @@ func newRawManifest() rawManifest {
 	}
 }
 
+type possibleProps struct {
+	Branch   string
+	Revision string
+	Version  string
+	Source   string
+}
+
 func readManifest(r io.Reader) (*Manifest, error) {
 	rm := rawManifest{}
 	err := json.NewDecoder(r).Decode(&rm)
@@ -127,18 +126,6 @@ func (m *Manifest) toRaw() rawManifest {
 	return raw
 }
 
-func (m *Manifest) MarshalJSON() ([]byte, error) {
-	raw := m.toRaw()
-
-	var buf bytes.Buffer
-	enc := json.NewEncoder(&buf)
-	enc.SetIndent("", "    ")
-	enc.SetEscapeHTML(false)
-	err := enc.Encode(raw)
-
-	return buf.Bytes(), err
-}
-
 func (m *Manifest) MarshalTOML() (string, error) {
 	raw := m.toRaw()