diff --git a/cloudflare/r2.go b/cloudflare/r2.go
new file mode 100644
index 0000000..453c713
--- /dev/null
+++ b/cloudflare/r2.go
@@ -0,0 +1,31 @@
+package cloudflare
+
+import (
+	"github.com/syumai/workers/cloudflare/r2"
+)
+
+// R2Bucket represents interface of Cloudflare Worker's R2 Bucket instance.
+// Deprecated: use r2.Bucket instead.
+type R2Bucket = r2.Bucket
+
+// NewR2Bucket returns R2Bucket for given variable name.
+// Deprecated: use r2.NewBucket instead.
+func NewR2Bucket(varName string) (*R2Bucket, error) {
+	return r2.NewBucket(varName)
+}
+
+// R2PutOptions represents Cloudflare R2 put options.
+// Deprecated: use r2.PutOptions instead.
+type R2PutOptions = r2.PutOptions
+
+// R2Object represents Cloudflare R2 object.
+// Deprecated: use r2.Object instead.
+type R2Object = r2.Object
+
+// R2HTTPMetadata represents metadata of R2Object.
+// Deprecated: use r2.HTTPMetadata instead.
+type R2HTTPMetadata = r2.HTTPMetadata
+
+// R2Objects represents Cloudflare R2 objects.
+// Deprecated: use r2.Objects instead.
+type R2Objects = r2.Objects
diff --git a/cloudflare/r2bucket.go b/cloudflare/r2bucket.go
index be7377e..9235e63 100644
--- a/cloudflare/r2bucket.go
+++ b/cloudflare/r2bucket.go
@@ -1,19 +1 @@
 package cloudflare
-
-import (
-	"github.com/syumai/workers/cloudflare/r2"
-)
-
-// R2Bucket represents interface of Cloudflare Worker's R2 Bucket instance.
-// Deprecated: use r2.Bucket instead.
-type R2Bucket = r2.Bucket
-
-// NewR2Bucket returns R2Bucket for given variable name.
-// Deprecated: use r2.NewBucket instead.
-func NewR2Bucket(varName string) (*R2Bucket, error) {
-	return r2.NewBucket(varName)
-}
-
-// R2PutOptions represents Cloudflare R2 put options.
-// Deprecated: use r2.PutOptions instead.
-type R2PutOptions = r2.PutOptions
diff --git a/cloudflare/r2object.go b/cloudflare/r2object.go
index f9591be..9235e63 100644
--- a/cloudflare/r2object.go
+++ b/cloudflare/r2object.go
@@ -1,13 +1 @@
 package cloudflare
-
-import (
-	"github.com/syumai/workers/cloudflare/r2"
-)
-
-// R2Object represents Cloudflare R2 object.
-// Deprecated: use r2.Object instead.
-type R2Object = r2.Object
-
-// R2HTTPMetadata represents metadata of R2Object.
-// Deprecated: use r2.HTTPMetadata instead.
-type R2HTTPMetadata = r2.HTTPMetadata
diff --git a/cloudflare/r2objects.go b/cloudflare/r2objects.go
index 930a2c7..9235e63 100644
--- a/cloudflare/r2objects.go
+++ b/cloudflare/r2objects.go
@@ -1,9 +1 @@
 package cloudflare
-
-import (
-	"github.com/syumai/workers/cloudflare/r2"
-)
-
-// R2Objects represents Cloudflare R2 objects.
-// Deprecated: use r2.Objects instead.
-type R2Objects = r2.Objects