diff --git a/pallas-addresses/Cargo.toml b/pallas-addresses/Cargo.toml
index 67ac1468..bf359ddb 100644
--- a/pallas-addresses/Cargo.toml
+++ b/pallas-addresses/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "pallas-addresses"
 description = "Ergonomic library to work with different Cardano addresses"
-version = "0.11.0"
+version = "0.12.0-alpha.0"
 edition = "2021"
 repository = "https://github.com/txpipe/pallas"
 homepage = "https://github.com/txpipe/pallas"
@@ -14,8 +14,8 @@ authors = [
 
 [dependencies]
 hex = "0.4.3"
-pallas-crypto = { version = "0.11.0", path = "../pallas-crypto" }
-pallas-codec = { version = "0.11.0", path = "../pallas-codec" }
+pallas-crypto = { version = "0.12.0-alpha.0", path = "../pallas-crypto" }
+pallas-codec = { version = "0.12.0-alpha.0", path = "../pallas-codec" }
 base58 = "0.2.0"
 bech32 = "0.8.1"
 thiserror = "1.0.31"
diff --git a/pallas-codec/Cargo.toml b/pallas-codec/Cargo.toml
index 3da1d2a8..5e8c12a7 100644
--- a/pallas-codec/Cargo.toml
+++ b/pallas-codec/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "pallas-codec"
 description = "Pallas common CBOR encoding interface and utilities"
-version = "0.11.0"
+version = "0.12.0-alpha.0"
 edition = "2021"
 repository = "https://github.com/txpipe/pallas"
 homepage = "https://github.com/txpipe/pallas"
diff --git a/pallas-crypto/Cargo.toml b/pallas-crypto/Cargo.toml
index 380be9c8..e05f28a0 100644
--- a/pallas-crypto/Cargo.toml
+++ b/pallas-crypto/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "pallas-crypto"
 description = "Cryptographic primitives for Cardano"
-version = "0.11.0"
+version = "0.12.0-alpha.0"
 edition = "2021"
 repository = "https://github.com/txpipe/pallas"
 homepage = "https://github.com/txpipe/pallas"
@@ -17,7 +17,7 @@ hex = "0.4"
 cryptoxide = { version = "0.4.1" }
 thiserror = "1.0"
 rand_core = "0.6"
-pallas-codec = { version = "0.11.0", path = "../pallas-codec" }
+pallas-codec = { version = "0.12.0-alpha.0", path = "../pallas-codec" }
 
 [dev-dependencies]
 quickcheck = "1.0"
diff --git a/pallas-miniprotocols/Cargo.toml b/pallas-miniprotocols/Cargo.toml
index 6bd371d4..593ac8ea 100644
--- a/pallas-miniprotocols/Cargo.toml
+++ b/pallas-miniprotocols/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "pallas-miniprotocols"
 description = "Implementation of the Ouroboros network mini-protocols state-machines"
-version = "0.11.0"
+version = "0.12.0-alpha.0"
 edition = "2021"
 repository = "https://github.com/txpipe/pallas"
 homepage = "https://github.com/txpipe/pallas"
@@ -13,8 +13,8 @@ authors = [
 ]
 
 [dependencies]
-pallas-codec = { version = "0.11.0",  path = "../pallas-codec/" }
-pallas-multiplexer = { version = "0.11.0",  path = "../pallas-multiplexer/" }
+pallas-codec = { version = "0.12.0-alpha.0",  path = "../pallas-codec/" }
+pallas-multiplexer = { version = "0.12.0-alpha.0",  path = "../pallas-multiplexer/" }
 log = "0.4.14"
 hex = "0.4.3"
 itertools = "0.10.3"
diff --git a/pallas-multiplexer/Cargo.toml b/pallas-multiplexer/Cargo.toml
index c8acf294..0058bb42 100644
--- a/pallas-multiplexer/Cargo.toml
+++ b/pallas-multiplexer/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "pallas-multiplexer"
 description = "Multithreaded Ouroboros multiplexer implementation using mpsc channels"
-version = "0.11.0"
+version = "0.12.0-alpha.0"
 edition = "2021"
 repository = "https://github.com/txpipe/pallas"
 homepage = "https://github.com/txpipe/pallas"
@@ -13,7 +13,7 @@ authors = [
 ]
 
 [dependencies]
-pallas-codec = { version = "0.11.0",  path = "../pallas-codec/" }
+pallas-codec = { version = "0.12.0-alpha.0",  path = "../pallas-codec/" }
 log = "0.4.14"
 byteorder = "1.4.3"
 hex = "0.4.3"
diff --git a/pallas-primitives/Cargo.toml b/pallas-primitives/Cargo.toml
index b9448465..e7b4cd6f 100644
--- a/pallas-primitives/Cargo.toml
+++ b/pallas-primitives/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "pallas-primitives"
 description = "Ledger primitives and cbor codec for the different Cardano eras"
-version = "0.11.0"
+version = "0.12.0-alpha.0"
 edition = "2021"
 repository = "https://github.com/txpipe/pallas"
 homepage = "https://github.com/txpipe/pallas"
@@ -16,8 +16,8 @@ authors = [
 [dependencies]
 hex = "0.4.3"
 log = "0.4.14"
-pallas-crypto = { version = "0.11.0", path = "../pallas-crypto" }
-pallas-codec = { version = "0.11.0", path = "../pallas-codec" }
+pallas-crypto = { version = "0.12.0-alpha.0", path = "../pallas-crypto" }
+pallas-codec = { version = "0.12.0-alpha.0", path = "../pallas-codec" }
 base58 = "0.2.0"
 bech32 = "0.9.0"
 serde = { version ="1.0.136", optional = true }
diff --git a/pallas-traverse/Cargo.toml b/pallas-traverse/Cargo.toml
index c5e26acf..a92d8085 100644
--- a/pallas-traverse/Cargo.toml
+++ b/pallas-traverse/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "pallas-traverse"
 description = "Utilities to traverse over multi-era block data"
-version = "0.11.1"
+version = "0.12.0-alpha.0"
 edition = "2021"
 repository = "https://github.com/txpipe/pallas"
 homepage = "https://github.com/txpipe/pallas"
@@ -13,9 +13,9 @@ authors = [
 ]
 
 [dependencies]
-pallas-primitives = { version = "0.11.0", path = "../pallas-primitives" }
-pallas-addresses = { version = "0.11.0", path = "../pallas-addresses" }
-pallas-crypto = { version = "0.11.0", path = "../pallas-crypto" }
-pallas-codec = { version = "0.11.0", path = "../pallas-codec" }
+pallas-primitives = { version = "0.12.0-alpha.0", path = "../pallas-primitives" }
+pallas-addresses = { version = "0.12.0-alpha.0", path = "../pallas-addresses" }
+pallas-crypto = { version = "0.12.0-alpha.0", path = "../pallas-crypto" }
+pallas-codec = { version = "0.12.0-alpha.0", path = "../pallas-codec" }
 hex = "0.4.3"
 thiserror = "1.0.31"
diff --git a/pallas/Cargo.toml b/pallas/Cargo.toml
index faea06b4..602f7a36 100644
--- a/pallas/Cargo.toml
+++ b/pallas/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "pallas"
 description = "Rust-native building blocks for the Cardano blockchain ecosystem."
-version = "0.11.0"
+version = "0.12.0-alpha.0"
 edition = "2021"
 repository = "https://github.com/txpipe/pallas"
 homepage = "https://github.com/txpipe/pallas"
@@ -13,10 +13,10 @@ authors = [
 ]
 
 [dependencies]
-pallas-multiplexer = { version = "0.11.0", path = "../pallas-multiplexer/" }
-pallas-miniprotocols = { version = "0.11.0", path = "../pallas-miniprotocols/" }
-pallas-primitives = { version = "0.11.0", path = "../pallas-primitives/" }
-pallas-traverse = { version = "0.11.0", path = "../pallas-traverse/" }
-pallas-addresses = { version = "0.11.0", path = "../pallas-addresses/" }
-pallas-crypto = { version = "0.11.0", path = "../pallas-crypto/" }
-pallas-codec = { version = "0.11.0", path = "../pallas-codec/" }
+pallas-multiplexer = { version = "0.12.0-alpha.0", path = "../pallas-multiplexer/" }
+pallas-miniprotocols = { version = "0.12.0-alpha.0", path = "../pallas-miniprotocols/" }
+pallas-primitives = { version = "0.12.0-alpha.0", path = "../pallas-primitives/" }
+pallas-traverse = { version = "0.12.0-alpha.0", path = "../pallas-traverse/" }
+pallas-addresses = { version = "0.12.0-alpha.0", path = "../pallas-addresses/" }
+pallas-crypto = { version = "0.12.0-alpha.0", path = "../pallas-crypto/" }
+pallas-codec = { version = "0.12.0-alpha.0", path = "../pallas-codec/" }