diff --git a/git_static.go b/git_static.go
index 547ae8a..d7c2295 100644
--- a/git_static.go
+++ b/git_static.go
@@ -8,8 +8,8 @@ package git
 #cgo !windows pkg-config: --static ${SRCDIR}/static-build/install/lib/pkgconfig/libgit2.pc
 #include <git2.h>
 
-#if LIBGIT2_VER_MAJOR != 0 || LIBGIT2_VER_MINOR != 27
-# error "Invalid libgit2 version; this git2go supports libgit2 v0.27"
+#if LIBGIT2_VER_MAJOR != 0 || LIBGIT2_VER_MINOR != 28
+# error "Invalid libgit2 version; this git2go supports libgit2 v0.28"
 #endif
 
 */
diff --git a/object.go b/object.go
index 40ab2bf..2d75b06 100644
--- a/object.go
+++ b/object.go
@@ -13,12 +13,12 @@ import (
 type ObjectType int
 
 const (
-	ObjectAny    ObjectType = C.GIT_OBJECT_ANY
-	ObjectBad    ObjectType = C.GIT_OBJECT_BAD
-	ObjectCommit ObjectType = C.GIT_OBJECT_COMMIT
-	ObjectTree   ObjectType = C.GIT_OBJECT_TREE
-	ObjectBlob   ObjectType = C.GIT_OBJECT_BLOB
-	ObjectTag    ObjectType = C.GIT_OBJECT_TAG
+	ObjectAny     ObjectType = C.GIT_OBJECT_ANY
+	ObjectInvalid ObjectType = C.GIT_OBJECT_INVALID
+	ObjectCommit  ObjectType = C.GIT_OBJECT_COMMIT
+	ObjectTree    ObjectType = C.GIT_OBJECT_TREE
+	ObjectBlob    ObjectType = C.GIT_OBJECT_BLOB
+	ObjectTag     ObjectType = C.GIT_OBJECT_TAG
 )
 
 type Object struct {
@@ -35,8 +35,8 @@ func (t ObjectType) String() string {
 	switch t {
 	case ObjectAny:
 		return "Any"
-	case ObjectBad:
-		return "Bad"
+	case ObjectInvalid:
+		return "Invalid"
 	case ObjectCommit:
 		return "Commit"
 	case ObjectTree:
diff --git a/odb.go b/odb.go
index 5768cf4..fec0eb9 100644
--- a/odb.go
+++ b/odb.go
@@ -66,7 +66,7 @@ func (v *Odb) ReadHeader(oid *Oid) (uint64, ObjectType, error) {
 	ret := C.git_odb_read_header(&sz, &cotype, v.ptr, oid.toC())
 	runtime.KeepAlive(v)
 	if ret < 0 {
-		return 0, ObjectBad, MakeGitError(ret)
+		return 0, ObjectInvalid, MakeGitError(ret)
 	}
 
 	return uint64(sz), ObjectType(cotype), nil
diff --git a/vendor/libgit2 b/vendor/libgit2
index fba70a9..1a107fa 160000
--- a/vendor/libgit2
+++ b/vendor/libgit2
@@ -1 +1 @@
-Subproject commit fba70a9d5f1fa433968a3dfd51e3153c8eebe834
+Subproject commit 1a107fac0fc88a4d74b64ffc9ae2fd178ba631c0