diff --git a/git_dynamic.go b/git_dynamic.go
index 00828a5..0a977e8 100644
--- a/git_dynamic.go
+++ b/git_dynamic.go
@@ -6,8 +6,8 @@ package git
 #include <git2.h>
 #cgo pkg-config: libgit2
 
-#if LIBGIT2_VER_MAJOR != 0 || LIBGIT2_VER_MINOR != 26
-# error "Invalid libgit2 version; this git2go supports libgit2 v0.26"
+#if LIBGIT2_VER_MAJOR != 0 || LIBGIT2_VER_MINOR != 27
+# error "Invalid libgit2 version; this git2go supports libgit2 v0.27"
 #endif
 
 */
diff --git a/git_static.go b/git_static.go
index b42d49f..6303734 100644
--- a/git_static.go
+++ b/git_static.go
@@ -9,8 +9,8 @@ package git
 #cgo !windows pkg-config: --static ${SRCDIR}/vendor/libgit2/build/libgit2.pc
 #include <git2.h>
 
-#if LIBGIT2_VER_MAJOR != 0 || LIBGIT2_VER_MINOR != 26
-# error "Invalid libgit2 version; this git2go supports libgit2 v0.26"
+#if LIBGIT2_VER_MAJOR != 0 || LIBGIT2_VER_MINOR != 27
+# error "Invalid libgit2 version; this git2go supports libgit2 v0.27"
 #endif
 
 */
diff --git a/merge.go b/merge.go
index bfbf9a3..adc521a 100644
--- a/merge.go
+++ b/merge.go
@@ -355,6 +355,7 @@ type MergeFileOptions struct {
 	TheirLabel    string
 	Favor         MergeFileFavor
 	Flags         MergeFileFlags
+	MarkerSize    uint16
 }
 
 func mergeFileOptionsFromC(c C.git_merge_file_options) MergeFileOptions {
@@ -364,6 +365,7 @@ func mergeFileOptionsFromC(c C.git_merge_file_options) MergeFileOptions {
 		TheirLabel:    C.GoString(c.their_label),
 		Favor:         MergeFileFavor(c.favor),
 		Flags:         MergeFileFlags(c.flags),
+		MarkerSize:    uint16(c.marker_size),
 	}
 }
 
@@ -373,6 +375,7 @@ func populateCMergeFileOptions(c *C.git_merge_file_options, options MergeFileOpt
 	c.their_label = C.CString(options.TheirLabel)
 	c.favor = C.git_merge_file_favor_t(options.Favor)
 	c.flags = C.git_merge_file_flag_t(options.Flags)
+	c.marker_size = C.ushort(options.MarkerSize)
 }
 
 func freeCMergeFileOptions(c *C.git_merge_file_options) {
diff --git a/odb.go b/odb.go
index 64c5415..f236fc4 100644
--- a/odb.go
+++ b/odb.go
@@ -182,17 +182,21 @@ func (v *Odb) Hash(data []byte, otype ObjectType) (oid *Oid, err error) {
 // contents of the object.
 func (v *Odb) NewReadStream(id *Oid) (*OdbReadStream, error) {
 	stream := new(OdbReadStream)
+	var ctype C.git_otype
+	var csize C.size_t
 
 	runtime.LockOSThread()
 	defer runtime.UnlockOSThread()
 
-	ret := C.git_odb_open_rstream(&stream.ptr, v.ptr, id.toC())
+	ret := C.git_odb_open_rstream(&stream.ptr, &csize, &ctype, v.ptr, id.toC())
 	runtime.KeepAlive(v)
 	runtime.KeepAlive(id)
 	if ret < 0 {
 		return nil, MakeGitError(ret)
 	}
 
+	stream.Size = uint64(csize)
+	stream.Type = ObjectType(ctype)
 	runtime.SetFinalizer(stream, (*OdbReadStream).Free)
 	return stream, nil
 }
@@ -264,7 +268,9 @@ func (object *OdbObject) Data() (data []byte) {
 }
 
 type OdbReadStream struct {
-	ptr *C.git_odb_stream
+	ptr  *C.git_odb_stream
+	Size uint64
+	Type ObjectType
 }
 
 // Read reads from the stream
diff --git a/vendor/libgit2 b/vendor/libgit2
index f1323d9..809b0ca 160000
--- a/vendor/libgit2
+++ b/vendor/libgit2
@@ -1 +1 @@
-Subproject commit f1323d9c161aeeada190fd9615a8b5a9fb8a7f3e
+Subproject commit 809b0ca6b9b6a5648b8e802a9f0c6a0821257595