diff --git a/CHANGES.md b/CHANGES.md
index 13035e4..789edd0 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,5 +1,10 @@
 # Changes
 
+## v0.46.1
+
+This is an empty release that was created solely to aid in firestore's module
+carve-out. See: https://github.com/golang/go/wiki/Modules#is-it-possible-to-add-a-module-to-a-multi-module-repository.
+
 ## v0.46.0
 
 - spanner:
diff --git a/firestore/CHANGES.md b/firestore/CHANGES.md
new file mode 100644
index 0000000..f141a26
--- /dev/null
+++ b/firestore/CHANGES.md
@@ -0,0 +1,6 @@
+# Changes
+
+## v1.0.0
+
+This is the first tag to carve out firestore as its own module. See:
+https://github.com/golang/go/wiki/Modules#is-it-possible-to-add-a-module-to-a-multi-module-repository.
\ No newline at end of file
diff --git a/firestore/go.mod b/firestore/go.mod
new file mode 100644
index 0000000..20660e5
--- /dev/null
+++ b/firestore/go.mod
@@ -0,0 +1,13 @@
+module cloud.google.com/go/firestore
+
+go 1.13
+
+require (
+	cloud.google.com/go v0.46.1
+	github.com/golang/protobuf v1.3.2
+	github.com/google/go-cmp v0.3.0
+	github.com/googleapis/gax-go/v2 v2.0.5
+	google.golang.org/api v0.9.0
+	google.golang.org/genproto v0.0.0-20190911173649-1774047e7e51
+	google.golang.org/grpc v1.21.1
+)
diff --git a/firestore/go.sum b/firestore/go.sum
new file mode 100644
index 0000000..08ec0cf
--- /dev/null
+++ b/firestore/go.sum
@@ -0,0 +1,159 @@
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diff --git a/firestore/go_mod_tidy_hack.go b/firestore/go_mod_tidy_hack.go
new file mode 100644
index 0000000..9b612f6
--- /dev/null
+++ b/firestore/go_mod_tidy_hack.go
@@ -0,0 +1,22 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+// This file, and the cloud.google.com/go import, won't actually become part of
+// the resultant binary.
+// +build modhack
+
+package firestore
+
+// Necessary for safely adding multi-module repo. See: https://github.com/golang/go/wiki/Modules#is-it-possible-to-add-a-module-to-a-multi-module-repository
+import _ "cloud.google.com/go"