diff --git a/core/coreapi/block.go b/core/coreapi/block.go
index 561389f07..ffb619597 100644
--- a/core/coreapi/block.go
+++ b/core/coreapi/block.go
@@ -12,9 +12,9 @@ import (
 	coreiface "github.com/ipfs/go-ipfs/core/coreapi/interface"
 	caopts "github.com/ipfs/go-ipfs/core/coreapi/interface/options"
 
-	mh "gx/ipfs/QmYeKnKpubCMRiq3PGZcTREErthbb5Q9cXsCoSkD9bjEBd/go-multihash"
-	blocks "gx/ipfs/QmYsEQydGrsxNZfAiskvQ76N2xE9hDQtSAkRSynwMiUK3c/go-block-format"
-	cid "gx/ipfs/QmeSrf6pzut73u6zLQkRFQ3ygt3k6XFT2kjdYP8Tnkwwyg/go-cid"
+	mh "gx/ipfs/QmZyZDi491cCNTLfAhwcaDii2Kg4pwKRkhqQzURGDvY6ua/go-multihash"
+	cid "gx/ipfs/QmcZfnkapfECQGcLZaf9B79NRg7cRa9EnZh4LSbkCzwNvY/go-cid"
+	blocks "gx/ipfs/Qmej7nf81hi2x2tvjRBF3mcp74sQyuDH4VMYDGd1YtXjb2/go-block-format"
 )
 
 type BlockAPI struct {
@@ -63,12 +63,12 @@ func (api *BlockAPI) Put(ctx context.Context, src io.Reader, opts ...caopts.Bloc
 		return nil, err
 	}
 
-	k, err := api.node.Blocks.AddBlock(b)
+	err = api.node.Blocks.AddBlock(b)
 	if err != nil {
 		return nil, err
 	}
 
-	return ParseCid(k), nil
+	return ParseCid(b.Cid()), nil
 }
 
 func (api *BlockAPI) Get(ctx context.Context, p coreiface.Path) (io.Reader, error) {
diff --git a/core/coreapi/block_test.go b/core/coreapi/block_test.go
index bef532fdc..7fcdbca7e 100644
--- a/core/coreapi/block_test.go
+++ b/core/coreapi/block_test.go
@@ -6,7 +6,7 @@ import (
 	"strings"
 	"testing"
 
-	mh "gx/ipfs/QmYeKnKpubCMRiq3PGZcTREErthbb5Q9cXsCoSkD9bjEBd/go-multihash"
+	mh "gx/ipfs/QmZyZDi491cCNTLfAhwcaDii2Kg4pwKRkhqQzURGDvY6ua/go-multihash"
 )
 
 func TestBlockPut(t *testing.T) {
diff --git a/core/coreapi/interface/interface.go b/core/coreapi/interface/interface.go
index 2402ecf81..95351e7d0 100644
--- a/core/coreapi/interface/interface.go
+++ b/core/coreapi/interface/interface.go
@@ -62,12 +62,16 @@ type BlockStat interface {
 type CoreAPI interface {
 	// Unixfs returns an implementation of Unixfs API.
 	Unixfs() UnixfsAPI
+
 	// Block returns an implementation of Block API.
 	Block() BlockAPI
+
 	// Dag returns an implementation of Dag API.
 	Dag() DagAPI
+
 	// Name returns an implementation of Name API.
 	Name() NameAPI
+
 	// Key returns an implementation of Key API.
 	Key() KeyAPI
 
diff --git a/core/coreapi/interface/options/block.go b/core/coreapi/interface/options/block.go
index 7e6ad3230..bbb14612f 100644
--- a/core/coreapi/interface/options/block.go
+++ b/core/coreapi/interface/options/block.go
@@ -1,8 +1,7 @@
 package options
 
 import (
-	//cid "gx/ipfs/QmeSrf6pzut73u6zLQkRFQ3ygt3k6XFT2kjdYP8Tnkwwyg/go-cid"
-	"gx/ipfs/QmYeKnKpubCMRiq3PGZcTREErthbb5Q9cXsCoSkD9bjEBd/go-multihash"
+	"gx/ipfs/QmZyZDi491cCNTLfAhwcaDii2Kg4pwKRkhqQzURGDvY6ua/go-multihash"
 )
 
 type BlockPutSettings struct {