diff --git a/semver.py b/semver.py
index 6bc9fcab..66d5262d 100644
--- a/semver.py
+++ b/semver.py
@@ -174,6 +174,39 @@ def __iter__(self):
         for v in self._astuple():
             yield v
 
+    def __getitem__(self, index):
+        """Implement getitem. If the part requested is undefined, or a part of the
+           range requested is undefined, it will throw an index error.
+           Negative indices are not supported
+
+           :param Union[int, slice] index: a positive integer indicating the
+                  offset or a slice
+           :raises: IndexError, if index is beyond the range or a part is None
+           """
+        undefined_error = IndexError("Version part undefined")
+        negative_error = IndexError("Version index cannot be negative")
+        if isinstance(index, slice):
+            if (False if index.start is None else index.start < 0) or \
+                    (False if index.stop is None else index.stop < 0):
+                raise negative_error
+            else:
+                slice_is_full = True
+                part = self._astuple()[index]
+                for i in part:
+                    if i is None:
+                        slice_is_full = False
+                    elif not slice_is_full:
+                        raise undefined_error
+                part = tuple(filter(None, part))
+        else:
+            if index < 0:
+                raise negative_error
+            else:
+                part = self._astuple()[index]
+                if part is None:
+                    raise undefined_error
+        return part
+
     def bump_major(self):
         """Raise the major part of the version, return a new object
            but leave self untouched
diff --git a/test_semver.py b/test_semver.py
index 6b1bf579..0edbe61c 100644
--- a/test_semver.py
+++ b/test_semver.py
@@ -698,3 +698,63 @@ def test_should_return_versioninfo_with_replaced_parts(version,
 def test_replace_raises_ValueError_for_non_numeric_values():
     with pytest.raises(ValueError):
         VersionInfo.parse("1.2.3").replace(major="x")
+
+
+@pytest.mark.parametrize("version, index, expected", [
+    # Simple positive indices
+    ("1.2.3-rc.0+build.0", 0, 1),
+    ("1.2.3-rc.0+build.0", 1, 2),
+    ("1.2.3-rc.0+build.0", 2, 3),
+    ("1.2.3-rc.0+build.0", 3, "rc.0"),
+    ("1.2.3-rc.0+build.0", 4, "build.0"),
+    ("1.2.3-rc.0", 0, 1),
+    ("1.2.3-rc.0", 1, 2),
+    ("1.2.3-rc.0", 2, 3),
+    ("1.2.3-rc.0", 3, "rc.0"),
+    ("1.2.3", 0, 1),
+    ("1.2.3", 1, 2),
+    ("1.2.3", 2, 3),
+])
+def test_version_info_should_be_accessed_with_index(version, index, expected):
+    version_info = VersionInfo.parse(version)
+    assert version_info[index] == expected
+
+
+@pytest.mark.parametrize("version, slice_object, expected", [
+    # Slice indices
+    ("1.2.3-rc.0+build.0", slice(0, 5), (1, 2, 3, "rc.0", "build.0")),
+    ("1.2.3-rc.0+build.0", slice(0, 4), (1, 2, 3, "rc.0")),
+    ("1.2.3-rc.0+build.0", slice(0, 3), (1, 2, 3)),
+    ("1.2.3-rc.0+build.0", slice(0, 2), (1, 2)),
+    ("1.2.3-rc.0+build.0", slice(3, 5), ("rc.0", "build.0")),
+    ("1.2.3-rc.0", slice(0, 4), (1, 2, 3, "rc.0")),
+    ("1.2.3-rc.0", slice(0, 3), (1, 2, 3)),
+    ("1.2.3-rc.0", slice(0, 2), (1, 2)),
+    ("1.2.3", slice(0, 10), (1, 2, 3)),
+    ("1.2.3", slice(0, 3), (1, 2, 3)),
+    ("1.2.3", slice(0, 2), (1, 2)),
+    # Special cases
+    ("1.2.3-rc.0+build.0", slice(3), (1, 2, 3)),
+    ("1.2.3-rc.0+build.0", slice(0, 5, 2), (1, 3, "build.0")),
+    ("1.2.3-rc.0+build.0", slice(None, 5, 2), (1, 3, "build.0")),
+    ("1.2.3-rc.0+build.0", slice(5, 0, -2), ("build.0", 3)),
+])
+def test_version_info_should_be_accessed_with_slice_object(version,
+                                                           slice_object,
+                                                           expected):
+    version_info = VersionInfo.parse(version)
+    assert version_info[slice_object] == expected
+
+
+@pytest.mark.parametrize("version, index", [
+    ("1.2.3-rc.0+build.0", -1),
+    ("1.2.3-rc.0", -1),
+    ("1.2.3-rc.0", 4),
+    ("1.2.3", -1),
+    ("1.2.3", 3),
+    ("1.2.3", 4),
+])
+def test_version_info_should_throw_index_error(version, index):
+    version_info = VersionInfo.parse(version)
+    with pytest.raises(IndexError):
+        version_info[index]