diff --git a/polkadot/Cargo.lock b/polkadot/Cargo.lock
index e5001ca1c8..57cd361578 100644
--- a/polkadot/Cargo.lock
+++ b/polkadot/Cargo.lock
@@ -2071,7 +2071,6 @@ dependencies = [
  "polkadot-primitives 0.7.17",
  "polkadot-runtime-common 0.7.17",
  "rustc-hex 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "safe-mix 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -3912,7 +3911,6 @@ dependencies = [
  "polkadot-primitives 0.7.17",
  "polkadot-runtime-common 0.7.17",
  "rustc-hex 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "safe-mix 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_derive 1.0.102 (registry+https://github.com/rust-lang/crates.io-index)",
  "serde_json 1.0.41 (registry+https://github.com/rust-lang/crates.io-index)",
diff --git a/polkadot/runtime/kusama/Cargo.toml b/polkadot/runtime/kusama/Cargo.toml
index 084c7a1562..6e68a510c0 100644
--- a/polkadot/runtime/kusama/Cargo.toml
+++ b/polkadot/runtime/kusama/Cargo.toml
@@ -10,7 +10,6 @@ bitvec = { version = "0.15.2", default-features = false, features = ["alloc"] }
 codec = { package = "parity-scale-codec", version = "1.1.0", default-features = false, features = ["derive"] }
 log = { version = "0.3.9", optional = true }
 rustc-hex = { version = "2.0.1", default-features = false }
-safe-mix = { version = "1.0.0", default-features = false }
 serde = { version = "1.0.102", default-features = false }
 serde_derive = { version = "1.0.102", optional = true }
 
@@ -128,7 +127,6 @@ std = [
 	"serde_derive",
 	"serde/std",
 	"log",
-	"safe-mix/std",
 	"babe/std",
 	"babe-primitives/std",
 	"sp-session/std",
diff --git a/polkadot/runtime/polkadot/Cargo.toml b/polkadot/runtime/polkadot/Cargo.toml
index b9f426966a..2a3a3dd17c 100644
--- a/polkadot/runtime/polkadot/Cargo.toml
+++ b/polkadot/runtime/polkadot/Cargo.toml
@@ -10,7 +10,6 @@ bitvec = { version = "0.15.2", default-features = false, features = ["alloc"] }
 codec = { package = "parity-scale-codec", version = "1.1.0", default-features = false, features = ["derive"] }
 log = { version = "0.3.9", optional = true }
 rustc-hex = { version = "2.0.1", default-features = false }
-safe-mix = { version = "1.0.0", default-features = false }
 serde = { version = "1.0.102", default-features = false }
 serde_derive = { version = "1.0.102", optional = true }
 
@@ -121,7 +120,6 @@ std = [
 	"serde_derive",
 	"serde/std",
 	"log",
-	"safe-mix/std",
 	"babe/std",
 	"babe-primitives/std",
 	"sp-session/std",