diff --git a/substrate/Cargo.lock b/substrate/Cargo.lock
index f3ecae6cb5..fb715b0c41 100644
--- a/substrate/Cargo.lock
+++ b/substrate/Cargo.lock
@@ -1671,7 +1671,6 @@ dependencies = [
  "serde 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.80 (registry+https://github.com/rust-lang/crates.io-index)",
  "sr-api 0.1.0",
- "sr-io 0.1.0",
  "sr-primitives 0.1.0",
  "sr-std 0.1.0",
  "sr-version 0.1.0",
diff --git a/substrate/node/runtime/Cargo.toml b/substrate/node/runtime/Cargo.toml
index 8add782018..6c86355b25 100644
--- a/substrate/node/runtime/Cargo.toml
+++ b/substrate/node/runtime/Cargo.toml
@@ -13,7 +13,6 @@ parity-codec = "2.1"
 parity-codec-derive = "2.1"
 sr-api = { path = "../../core/sr-api", default-features = false }
 sr-std = { path = "../../core/sr-std" }
-sr-io = { path = "../../core/sr-io" }
 srml-support = { path = "../../srml/support" }
 substrate-primitives = { path = "../../core/primitives" }
 substrate-keyring = { path = "../../core/keyring" }
@@ -40,7 +39,6 @@ std = [
 	"substrate-primitives/std",
 	"sr-api/std",
 	"sr-std/std",
-	"sr-io/std",
 	"srml-support/std",
 	"srml-balances/std",
 	"srml-consensus/std",
diff --git a/substrate/node/runtime/src/lib.rs b/substrate/node/runtime/src/lib.rs
index 998bb6640b..6dad8ca740 100644
--- a/substrate/node/runtime/src/lib.rs
+++ b/substrate/node/runtime/src/lib.rs
@@ -20,8 +20,6 @@
 // `construct_runtime!` does a lot of recursion and requires us to increase the limit to 256.
 #![recursion_limit="256"]
 
-extern crate sr_io as runtime_io;
-
 #[macro_use]
 extern crate sr_api as runtime_api;
 
diff --git a/substrate/node/runtime/wasm/Cargo.lock b/substrate/node/runtime/wasm/Cargo.lock
index d998a1069f..dc519d15fb 100644
--- a/substrate/node/runtime/wasm/Cargo.lock
+++ b/substrate/node/runtime/wasm/Cargo.lock
@@ -269,7 +269,6 @@ dependencies = [
  "parity-codec-derive 2.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "safe-mix 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "sr-api 0.1.0",
- "sr-io 0.1.0",
  "sr-primitives 0.1.0",
  "sr-std 0.1.0",
  "sr-version 0.1.0",
diff --git a/substrate/node/runtime/wasm/Cargo.toml b/substrate/node/runtime/wasm/Cargo.toml
index fbabdc4aaa..17ae789bdf 100644
--- a/substrate/node/runtime/wasm/Cargo.toml
+++ b/substrate/node/runtime/wasm/Cargo.toml
@@ -14,7 +14,6 @@ parity-codec = { version = "2.1", default-features = false }
 substrate-primitives = { path = "../../../core/primitives", default-features = false }
 sr-api = { path = "../../../core/sr-api", default-features = false }
 sr-std = { path = "../../../core/sr-std", default-features = false }
-sr-io = { path = "../../../core/sr-io", default-features = false }
 srml-support = { path = "../../../srml/support", default-features = false }
 srml-balances = { path = "../../../srml/balances", default-features = false }
 srml-consensus = { path = "../../../srml/consensus", default-features = false }
@@ -40,7 +39,6 @@ std = [
 	"substrate-primitives/std",
 	"sr-api/std",
 	"sr-std/std",
-	"sr-io/std",
 	"srml-support/std",
 	"srml-balances/std",
 	"srml-consensus/std",