diff --git a/internalshared/README.md b/internalshared/README.md
new file mode 100644
index 0000000000..dd2ee8a0b2
--- /dev/null
+++ b/internalshared/README.md
@@ -0,0 +1,14 @@
+HashiCorp-internal libs
+=================
+
+Do not use these unless you know what you're doing.
+
+These libraries are used by other HashiCorp software to reduce code duplication
+and increase consistency. They are not libraries needed by Vault plugins --
+those are in the sdk/ module.
+
+There are no compatibility guarantees. Things in here may change or move or
+disappear at any time.
+
+If you are a Vault plugin author and think you need a library in here in your
+plugin, please open an issue for discussion.
diff --git a/sdk/helper/gatedwriter/writer.go b/internalshared/gatedwriter/writer.go
similarity index 100%
rename from sdk/helper/gatedwriter/writer.go
rename to internalshared/gatedwriter/writer.go
diff --git a/sdk/helper/gatedwriter/writer_test.go b/internalshared/gatedwriter/writer_test.go
similarity index 100%
rename from sdk/helper/gatedwriter/writer_test.go
rename to internalshared/gatedwriter/writer_test.go
diff --git a/sdk/helper/listenerutil/listener.go b/internalshared/listenerutil/listener.go
similarity index 100%
rename from sdk/helper/listenerutil/listener.go
rename to internalshared/listenerutil/listener.go
diff --git a/sdk/helper/listenerutil/listener_test.go b/internalshared/listenerutil/listener_test.go
similarity index 100%
rename from sdk/helper/listenerutil/listener_test.go
rename to internalshared/listenerutil/listener_test.go
diff --git a/sdk/helper/reload/reload.go b/internalshared/reloadutil/reload.go
similarity index 100%
rename from sdk/helper/reload/reload.go
rename to internalshared/reloadutil/reload.go
diff --git a/sdk/helper/reload/reload_test.go b/internalshared/reloadutil/reload_test.go
similarity index 100%
rename from sdk/helper/reload/reload_test.go
rename to internalshared/reloadutil/reload_test.go
diff --git a/sdk/go.mod b/sdk/go.mod
index 40143385d8..2106fdc74a 100644
--- a/sdk/go.mod
+++ b/sdk/go.mod
@@ -22,8 +22,6 @@ require (
 	github.com/hashicorp/go-version v1.1.0
 	github.com/hashicorp/golang-lru v0.5.1
 	github.com/hashicorp/hcl v1.0.0
-	github.com/jefferai/isbadcipher v0.0.0-20190226160619-51d2077c035f
-	github.com/mitchellh/cli v1.0.0
 	github.com/mitchellh/copystructure v1.0.0
 	github.com/mitchellh/go-testing-interface v1.0.0
 	github.com/mitchellh/mapstructure v1.1.2
diff --git a/sdk/go.sum b/sdk/go.sum
index 9c43e0b03d..25730996b1 100644
--- a/sdk/go.sum
+++ b/sdk/go.sum
@@ -64,8 +64,6 @@ github.com/hashicorp/hcl v1.0.0 h1:0Anlzjpi4vEasTeNFn2mLJgTSwt0+6sfsiTG8qcWGx4=
 github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
 github.com/hashicorp/yamux v0.0.0-20180604194846-3520598351bb h1:b5rjCoWHc7eqmAS4/qyk21ZsHyb6Mxv/jykxvNTkU4M=
 github.com/hashicorp/yamux v0.0.0-20180604194846-3520598351bb/go.mod h1:+NfK9FKeTrX5uv1uIXGdwYDTeHna2qgaIlx54MXqjAM=
-github.com/jefferai/isbadcipher v0.0.0-20190226160619-51d2077c035f h1:E87tDTVS5W65euzixn7clSzK66puSt1H4I5SC0EmHH4=
-github.com/jefferai/isbadcipher v0.0.0-20190226160619-51d2077c035f/go.mod h1:3J2qVK16Lq8V+wfiL2lPeDZ7UWMxk5LemerHa1p6N00=
 github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af h1:pmfjZENx5imkbgOkpRUYLnmbU7UEFbjtDA2hxJ1ichM=
 github.com/jmespath/go-jmespath v0.0.0-20180206201540-c2b33e8439af/go.mod h1:Nht3zPeWKUH0NzdCt2Blrr5ys8VGpn0CEB0cQHVjt7k=
 github.com/mattn/go-colorable v0.0.9/go.mod h1:9vuHe8Xs5qXnSaW/c/ABM9alt+Vo+STaOChaDxuIBZU=