diff --git a/Cargo-minimal.lock b/Cargo-minimal.lock
index 5e47891e0..ecd87a177 100644
--- a/Cargo-minimal.lock
+++ b/Cargo-minimal.lock
@@ -107,7 +107,6 @@ dependencies = [
  "arbitrary",
  "bincode",
  "bitcoin-internals",
- "bitcoin-io",
  "bitcoin-units",
  "bitcoin_hashes 0.16.0",
  "hex-conservative 0.3.0",
diff --git a/Cargo-recent.lock b/Cargo-recent.lock
index 47641c992..16d558d3d 100644
--- a/Cargo-recent.lock
+++ b/Cargo-recent.lock
@@ -106,7 +106,6 @@ dependencies = [
  "arbitrary",
  "bincode",
  "bitcoin-internals",
- "bitcoin-io",
  "bitcoin-units",
  "bitcoin_hashes 0.16.0",
  "hex-conservative 0.3.0",
diff --git a/primitives/Cargo.toml b/primitives/Cargo.toml
index a44c42c6e..48074486c 100644
--- a/primitives/Cargo.toml
+++ b/primitives/Cargo.toml
@@ -16,8 +16,8 @@ exclude = ["tests", "contrib"]
 
 [features]
 default = ["std"]
-std = ["alloc", "hashes/std", "hex/std", "internals/std", "io/std", "units/std"]
-alloc = ["hashes/alloc", "hex/alloc", "internals/alloc", "io/alloc", "units/alloc"]
+std = ["alloc", "hashes/std", "hex/std", "internals/std", "units/std"]
+alloc = ["hashes/alloc", "hex/alloc", "internals/alloc", "units/alloc"]
 serde = ["dep:serde", "hashes/serde", "internals/serde", "units/serde", "alloc"]
 arbitrary = ["dep:arbitrary", "units/arbitrary"]
 
@@ -25,7 +25,6 @@ arbitrary = ["dep:arbitrary", "units/arbitrary"]
 hashes = { package = "bitcoin_hashes", version = "0.16.0", default-features = false, features = ["bitcoin-io", "hex"] }
 hex = { package = "hex-conservative", version = "0.3.0", default-features = false }
 internals = { package = "bitcoin-internals", version = "0.4.0" }
-io = { package = "bitcoin-io", version = "0.2.0", default-features = false }
 units = { package = "bitcoin-units", version = "0.2.0", default-features = false }
 
 arbitrary = { version = "1.4", optional = true }