diff --git a/substrate/Cargo.lock b/substrate/Cargo.lock
index f521384442..3bd5878940 100644
--- a/substrate/Cargo.lock
+++ b/substrate/Cargo.lock
@@ -697,7 +697,7 @@ dependencies = [
 
 [[package]]
 name = "environmental"
-version = "1.0.0"
+version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -2996,7 +2996,7 @@ dependencies = [
 name = "sr-io"
 version = "0.1.0"
 dependencies = [
- "environmental 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "environmental 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "hash-db 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "libsecp256k1 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "parity-codec 3.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -4688,7 +4688,7 @@ name = "twox-hash"
 version = "1.1.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -5090,7 +5090,7 @@ dependencies = [
 "checksum either 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3be565ca5c557d7f59e7cfcf1844f9e3033650c929c6566f511e8005f205c1d0"
 "checksum elastic-array 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "88d4851b005ef16de812ea9acdb7bece2f0a40dd86c07b85631d7dafa54537bb"
 "checksum env_logger 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)" = "afb070faf94c85d17d50ca44f6ad076bce18ae92f0037d350947240a36e9d42e"
-"checksum environmental 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "db746025e3ea695bfa0ae744dbacd5fcfc8db51b9760cf8bd0ab69708bb93c49"
+"checksum environmental 1.0.1 (registry+https://github.com/rust-lang/crates.io-index)" = "5c7464757b80de8930c91c9afe77ddce501826bf9d134a87db2c67d9dc177e2c"
 "checksum error-chain 0.12.0 (registry+https://github.com/rust-lang/crates.io-index)" = "07e791d3be96241c77c43846b665ef1384606da2cd2a48730abe606a12906e02"
 "checksum exit-future 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "87559b08e99a81a92bbb867d237543e43495857749f688e0773390a20d56c61c"
 "checksum failure 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "795bd83d3abeb9220f257e597aa0080a508b27533824adf336529648f6abf7e2"
diff --git a/substrate/core/sr-io/Cargo.toml b/substrate/core/sr-io/Cargo.toml
index 811c17e0b1..0c4c8b7ada 100644
--- a/substrate/core/sr-io/Cargo.toml
+++ b/substrate/core/sr-io/Cargo.toml
@@ -15,7 +15,7 @@ parity-codec = { version = "3.2", default-features = false }
 hash-db = { version = "0.11", default-features = false }
 libsecp256k1 = { version = "0.2.1", optional = true }
 tiny-keccak = { version = "1.4.2", optional = true }
-environmental = { version = "~1.0", optional = true }
+environmental = { version = "1.0.1", optional = true }
 substrate-state-machine = { path = "../state-machine", optional = true }
 trie = { package = "substrate-trie", path = "../trie", optional = true }
 
@@ -35,4 +35,4 @@ std = [
 ]
 nightly = []
 strict = []
-wasm-nice-panic-message = []
\ No newline at end of file
+wasm-nice-panic-message = []
diff --git a/substrate/core/sr-io/with_std.rs b/substrate/core/sr-io/with_std.rs
index d67d4ec53c..8f9a67c167 100644
--- a/substrate/core/sr-io/with_std.rs
+++ b/substrate/core/sr-io/with_std.rs
@@ -26,7 +26,7 @@ pub use tiny_keccak::keccak256 as keccak_256;
 // pub use primitives::BlakeHasher;
 pub use substrate_state_machine::{Externalities, BasicExternalities, TestExternalities};
 
-use environmental::{environmental, thread_local_impl};
+use environmental::environmental;
 use primitives::{hexdisplay::HexDisplay, H256};
 use hash_db::Hasher;