diff --git a/vendor/go.opentelemetry.io/otel/unit/doc.go b/vendor/go.opentelemetry.io/otel/unit/doc.go
new file mode 100644
index 0000000..310a7b2
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/unit/doc.go
@@ -0,0 +1,16 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Package unit provides units.
+package unit // import "go.opentelemetry.io/otel/unit"
diff --git a/vendor/go.opentelemetry.io/otel/unit/unit.go b/vendor/go.opentelemetry.io/otel/unit/unit.go
new file mode 100644
index 0000000..dcd39af
--- /dev/null
+++ b/vendor/go.opentelemetry.io/otel/unit/unit.go
@@ -0,0 +1,23 @@
+// Copyright The OpenTelemetry Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package unit
+
+type Unit string
+
+const (
+	Dimensionless Unit = "1"
+	Bytes         Unit = "By"
+	Milliseconds  Unit = "ms"
+)