diff --git a/Cargo-minimal.lock b/Cargo-minimal.lock
index efc2a258..d0e9014f 100644
--- a/Cargo-minimal.lock
+++ b/Cargo-minimal.lock
@@ -18,7 +18,7 @@ checksum = "96d30a06541fbafbc7f82ed10c06164cfbd2c401138f6addd8404629c4b16711"
 name = "base58ck"
 version = "0.1.0"
 dependencies = [
- "bitcoin-internals",
+ "bitcoin-internals 0.3.0",
  "bitcoin_hashes 0.14.0",
  "hex-conservative 0.2.0",
 ]
@@ -53,7 +53,7 @@ dependencies = [
  "base64",
  "bech32",
  "bincode",
- "bitcoin-internals",
+ "bitcoin-internals 0.3.0",
  "bitcoin-io",
  "bitcoin-units",
  "bitcoin_hashes 0.14.0",
@@ -82,6 +82,12 @@ dependencies = [
 [[package]]
 name = "bitcoin-internals"
 version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9425c3bf7089c983facbae04de54513cce73b41c7f9ff8c845b54e7bc64ebbfb"
+
+[[package]]
+name = "bitcoin-internals"
+version = "0.3.0"
 dependencies = [
  "serde",
 ]
@@ -94,7 +100,7 @@ version = "0.1.2"
 name = "bitcoin-units"
 version = "0.1.0"
 dependencies = [
- "bitcoin-internals",
+ "bitcoin-internals 0.3.0",
  "serde",
  "serde_json",
  "serde_test",
@@ -106,7 +112,7 @@ version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1930a4dabfebb8d7d9992db18ebe3ae2876f0a305fab206fd168df931ede293b"
 dependencies = [
- "bitcoin-internals",
+ "bitcoin-internals 0.2.0",
  "hex-conservative 0.1.1",
 ]
 
diff --git a/Cargo-recent.lock b/Cargo-recent.lock
index 718ff67e..d208e38a 100644
--- a/Cargo-recent.lock
+++ b/Cargo-recent.lock
@@ -18,7 +18,7 @@ checksum = "96d30a06541fbafbc7f82ed10c06164cfbd2c401138f6addd8404629c4b16711"
 name = "base58ck"
 version = "0.1.0"
 dependencies = [
- "bitcoin-internals",
+ "bitcoin-internals 0.3.0",
  "bitcoin_hashes 0.14.0",
  "hex-conservative 0.2.0",
 ]
@@ -52,7 +52,7 @@ dependencies = [
  "base64",
  "bech32",
  "bincode",
- "bitcoin-internals",
+ "bitcoin-internals 0.3.0",
  "bitcoin-io",
  "bitcoin-units",
  "bitcoin_hashes 0.14.0",
@@ -81,6 +81,12 @@ dependencies = [
 [[package]]
 name = "bitcoin-internals"
 version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9425c3bf7089c983facbae04de54513cce73b41c7f9ff8c845b54e7bc64ebbfb"
+
+[[package]]
+name = "bitcoin-internals"
+version = "0.3.0"
 dependencies = [
  "serde",
 ]
@@ -93,7 +99,7 @@ version = "0.1.2"
 name = "bitcoin-units"
 version = "0.1.0"
 dependencies = [
- "bitcoin-internals",
+ "bitcoin-internals 0.3.0",
  "serde",
  "serde_json",
  "serde_test",
@@ -105,7 +111,7 @@ version = "0.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1930a4dabfebb8d7d9992db18ebe3ae2876f0a305fab206fd168df931ede293b"
 dependencies = [
- "bitcoin-internals",
+ "bitcoin-internals 0.2.0",
  "hex-conservative 0.1.1",
 ]
 
diff --git a/base58/Cargo.toml b/base58/Cargo.toml
index 73a3580e..c83a11b5 100644
--- a/base58/Cargo.toml
+++ b/base58/Cargo.toml
@@ -22,7 +22,7 @@ rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
 hashes = { package = "bitcoin_hashes", version = "0.14.0", default-features = false, features = ["alloc"] }
-internals = { package = "bitcoin-internals", version = "0.2.0" }
+internals = { package = "bitcoin-internals", version = "0.3.0" }
 
 [dev-dependencies]
 hex = { package = "hex-conservative", version = "0.2.0", default-features = false, features = ["alloc"] }
diff --git a/bitcoin/Cargo.toml b/bitcoin/Cargo.toml
index 2b3fd880..e62a866f 100644
--- a/bitcoin/Cargo.toml
+++ b/bitcoin/Cargo.toml
@@ -33,7 +33,7 @@ bech32 = { version = "0.11.0", default-features = false, features = ["alloc"] }
 hashes = { package = "bitcoin_hashes", version = "0.14.0", default-features = false, features = ["alloc", "io"] }
 hex = { package = "hex-conservative", version = "0.2.0", default-features = false, features = ["alloc"] }
 hex_lit = "0.1.1"
-internals = { package = "bitcoin-internals", version = "0.2.0" }
+internals = { package = "bitcoin-internals", version = "0.3.0" }
 io = { package = "bitcoin-io", version = "0.1.1", default-features = false, features = ["alloc"] }
 secp256k1 = { version = "0.28.0", default-features = false, features = ["hashes", "alloc"] }
 units = { package = "bitcoin-units", version = "0.1.0", default-features = false, features = ["alloc"] }
diff --git a/contrib/run_task.sh b/contrib/run_task.sh
index d99042f4..a5f4ebc2 100755
--- a/contrib/run_task.sh
+++ b/contrib/run_task.sh
@@ -174,6 +174,7 @@ do_dup_deps() {
             | grep '^[0-9A-Za-z]' \
             | grep -v 'syn' \
             | grep -v 'bitcoin_hashes' \
+            | grep -v 'bitcoin-internals' \
             | grep -v 'hex-conservative' \
             | wc -l
                           )
diff --git a/internals/CHANGELOG.md b/internals/CHANGELOG.md
index 1003c776..b0f391f9 100644
--- a/internals/CHANGELOG.md
+++ b/internals/CHANGELOG.md
@@ -1,3 +1,8 @@
+# 0.3.0 - 2024-03-24
+
+- Bump MSRV to Rust version 1.56.1 [#2188](https://github.com/rust-bitcoin/rust-bitcoin/pull/2188)
+- Implement custom `ArrayVec` that is `Copy` [#2287](https://github.com/rust-bitcoin/rust-bitcoin/pull/2287)
+
 # 0.2.0 - 2023-06-20
 
 - [Rename crate](https://github.com/rust-bitcoin/rust-bitcoin/pull/1885) to `bitcoin-internals`
diff --git a/internals/Cargo.toml b/internals/Cargo.toml
index ade1a5d6..ca6d81be 100644
--- a/internals/Cargo.toml
+++ b/internals/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "bitcoin-internals"
-version = "0.2.0"
+version = "0.3.0"
 authors = ["Andrew Poelstra <apoelstra@wpsoftware.net>", "The Rust Bitcoin developers"]
 license = "CC0-1.0"
 repository = "https://github.com/rust-bitcoin/rust-bitcoin/"
diff --git a/units/Cargo.toml b/units/Cargo.toml
index 6f677deb..51b968d1 100644
--- a/units/Cargo.toml
+++ b/units/Cargo.toml
@@ -22,7 +22,7 @@ all-features = true
 rustdoc-args = ["--cfg", "docsrs"]
 
 [dependencies]
-internals = { package = "bitcoin-internals", version = "0.2.0" }
+internals = { package = "bitcoin-internals", version = "0.3.0" }
 
 serde = { version = "1.0.103", default-features = false, features = ["derive"], optional = true }