diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1bbe8204..3aa4e577 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,9 +1,89 @@
 # CHANGELOG
 
-All notable changes to Zebra will be documented in this file.
+All notable changes to Zebra are documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org).
 
+## [Zebra 1.0.0-alpha.19](https://github.com/ZcashFoundation/zebra/releases/tag/v1.0.0-alpha.19) - 2021-10-19
+
+Zebra's latest alpha updates dependencies, improves metrics, gossips verified blocks and transactions, and continues the mempool-related implementation.
+
+### Added
+
+- Ignore `AlreadyInChain` error in the syncer (#2890)
+- Give more information to the user in the wrong port init warning (#2853)
+- Send looked up UTXOs to the transaction verifier (#2849)
+- Return the transaction fee from the transaction verifier (#2876)
+- Gossip recently verified block hashes to peers (#2729)
+- Compute the serialized transaction size of unmined transactions (#2824)
+
+#### Mempool
+
+- Add a queue checker task, to make sure mempool transactions propagate (#2888)
+- Store the transaction fee in the mempool storage (#2885)
+- Add a debug config that enables the mempool (#2862)
+- Pass the mempool config to the mempool (#2861)
+- Add expired transactions to the mempool rejected list (#2852)
+- Send AdvertiseTransactionIds to peers (#2823)
+- Add a mempool config section (#2845)
+- Add transactions that failed verification to the mempool rejected list (#2821)
+- Un-reject mempool transactions if the rejection depends on the current tip
+  (#2844)
+- Split storage errors by match type: TXID or WTXID (#2833)
+- Remove transactions in newly committed blocks from the mempool (#2827)
+
+#### Documentation
+
+- Improve the template for release versioning (#2906)
+- Improve the documentation for the mempool transaction downloader (#2879)
+- Add the documentation for the mempool storage and gossip modules (#2884)
+
+#### Network Upgrade 5
+
+- Set the minimum testnet network protocol version to NU5 (#2851)
+
+#### Testing and CI
+
+- Add some additional checks to the acceptance mempool test (#2880)
+
+#### Metrics
+
+- Refactor and add some new mempool metrics (#2878)
+- Improve logging for initial peer connections (#2896)
+- Always zero the mempool metrics when the mempool is disabled (#2875)
+- Add a basic mempool storage Grafana dashboard (#2866)
+- Add zcash.mempool.size.transactions and zcash.mempool.size.bytes metrics
+  (#2860)
+- Make some grafana labels shorter for graph readability (#2850)
+- Make block metrics more accurate (#2835)
+
+### Changed
+
+#### Mempool
+
+- Avoid broadcasting mempool rejected or expired transactions to peers (#2858)
+- Encapsulate some mempool functions with the Mempool type (#2872)
+- Remove duplicate IDs in mempool requests and responses (#2887)
+- Refactor mempool spend conflict checks to increase performance (#2826)
+- Rename mempool storage methods by match type (#2841)
+- Remove unused mempool errors (#2831)
+
+### Fixed
+
+- Fix synchronization delay issue (#2921)
+- Fix test failures by flushing output streams before exiting Zebra (#2911, #2923)
+- Increase Zebra's restart acceptance test timeout (#2910)
+- Avoid spurious acceptance test failures by decreasing the peer crawler timeout (#2905)
+- Cancel pending download tasks when the mempool is disabled (#2886)
+- Stop allowing some newly mined transactions into the mempool (#2874)
+- Stop panicking when pruning unused queued blocks (#2842)
+
+### Security
+
+- Upgrade to ed25519-zebra 3.0.0 (#2864)
+- Stop ignoring the mempool conflicting transaction reject list size limit (#2855)
+
+
 ## [Zebra 1.0.0-alpha.18](https://github.com/ZcashFoundation/zebra/releases/tag/v1.0.0-alpha.18) - 2021-10-05
 
 Zebra's latest alpha updates dependencies, consensus parameters, and Orchard for NU5 testnet activation.
diff --git a/Cargo.lock b/Cargo.lock
index 85abab30..2ac208e8 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3986,7 +3986,7 @@ dependencies = [
 
 [[package]]
 name = "tower-batch"
-version = "0.2.14"
+version = "0.2.15"
 dependencies = [
  "color-eyre",
  "ed25519-zebra",
@@ -4006,7 +4006,7 @@ dependencies = [
 
 [[package]]
 name = "tower-fallback"
-version = "0.2.12"
+version = "0.2.13"
 dependencies = [
  "futures-core",
  "pin-project 0.4.28",
@@ -4753,7 +4753,7 @@ dependencies = [
 
 [[package]]
 name = "zebra-chain"
-version = "1.0.0-alpha.18"
+version = "1.0.0-alpha.19"
 dependencies = [
  "aes 0.6.0",
  "bech32",
@@ -4808,7 +4808,7 @@ version = "1.0.0-alpha.0"
 
 [[package]]
 name = "zebra-consensus"
-version = "1.0.0-alpha.18"
+version = "1.0.0-alpha.19"
 dependencies = [
  "bellman",
  "blake2b_simd",
@@ -4846,7 +4846,7 @@ dependencies = [
 
 [[package]]
 name = "zebra-network"
-version = "1.0.0-alpha.18"
+version = "1.0.0-alpha.19"
 dependencies = [
  "bitflags",
  "byteorder",
@@ -4881,7 +4881,7 @@ version = "1.0.0-alpha.0"
 
 [[package]]
 name = "zebra-script"
-version = "1.0.0-alpha.19"
+version = "1.0.0-alpha.20"
 dependencies = [
  "displaydoc",
  "hex",
@@ -4894,7 +4894,7 @@ dependencies = [
 
 [[package]]
 name = "zebra-state"
-version = "1.0.0-alpha.18"
+version = "1.0.0-alpha.19"
 dependencies = [
  "bincode",
  "chrono",
@@ -4928,7 +4928,7 @@ dependencies = [
 
 [[package]]
 name = "zebra-test"
-version = "1.0.0-alpha.15"
+version = "1.0.0-alpha.16"
 dependencies = [
  "color-eyre",
  "futures 0.3.17",
@@ -4952,7 +4952,7 @@ dependencies = [
 
 [[package]]
 name = "zebra-utils"
-version = "1.0.0-alpha.18"
+version = "1.0.0-alpha.19"
 dependencies = [
  "color-eyre",
  "hex",
@@ -4967,7 +4967,7 @@ dependencies = [
 
 [[package]]
 name = "zebrad"
-version = "1.0.0-alpha.18"
+version = "1.0.0-alpha.19"
 dependencies = [
  "abscissa_core",
  "atty",
diff --git a/README.md b/README.md
index 185c7c02..63e73678 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@ Building `zebrad` requires [Rust](https://www.rust-lang.org/tools/install),
 2. Install Zebra's build dependencies:
      - **libclang:** the `libclang`, `libclang-dev`, `llvm`, or `llvm-dev` packages, depending on your package manager
      - **clang** or another C++ compiler: `g++`, `Xcode`, or `MSVC`
-3. Run `cargo install --locked --git https://github.com/ZcashFoundation/zebra --tag v1.0.0-alpha.18 zebrad`
+3. Run `cargo install --locked --git https://github.com/ZcashFoundation/zebra --tag v1.0.0-alpha.19 zebrad`
 4. Run `zebrad start`
 
 If you're interested in testing out `zebrad` please feel free, but keep in mind
diff --git a/tower-batch/Cargo.toml b/tower-batch/Cargo.toml
index bc598f0a..4af0cc99 100644
--- a/tower-batch/Cargo.toml
+++ b/tower-batch/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "tower-batch"
-version = "0.2.14"
+version = "0.2.15"
 authors = ["Zcash Foundation <zebra@zfnd.org>"]
 license = "MIT"
 edition = "2018"
diff --git a/tower-fallback/Cargo.toml b/tower-fallback/Cargo.toml
index 0bae1ad7..c4dd50fe 100644
--- a/tower-fallback/Cargo.toml
+++ b/tower-fallback/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "tower-fallback"
-version = "0.2.12"
+version = "0.2.13"
 authors = ["Zcash Foundation <zebra@zfnd.org>"]
 license = "MIT"
 edition = "2018"
diff --git a/zebra-chain/Cargo.toml b/zebra-chain/Cargo.toml
index 6bf3faba..5b1e3bb3 100644
--- a/zebra-chain/Cargo.toml
+++ b/zebra-chain/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "zebra-chain"
-version = "1.0.0-alpha.18"
+version = "1.0.0-alpha.19"
 authors = ["Zcash Foundation <zebra@zfnd.org>"]
 license = "MIT OR Apache-2.0"
 edition = "2018"
diff --git a/zebra-consensus/Cargo.toml b/zebra-consensus/Cargo.toml
index 7d812a79..f3ecf5ae 100644
--- a/zebra-consensus/Cargo.toml
+++ b/zebra-consensus/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "zebra-consensus"
-version = "1.0.0-alpha.18"
+version = "1.0.0-alpha.19"
 authors = ["Zcash Foundation <zebra@zfnd.org>"]
 license = "MIT OR Apache-2.0"
 edition = "2018"
diff --git a/zebra-network/Cargo.toml b/zebra-network/Cargo.toml
index e0f61d44..49a1bb47 100644
--- a/zebra-network/Cargo.toml
+++ b/zebra-network/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "zebra-network"
-version = "1.0.0-alpha.18"
+version = "1.0.0-alpha.19"
 authors = ["Zcash Foundation <zebra@zfnd.org>"]
 license = "MIT OR Apache-2.0"
 edition = "2018"
diff --git a/zebra-network/src/constants.rs b/zebra-network/src/constants.rs
index 2fc09357..c798a95c 100644
--- a/zebra-network/src/constants.rs
+++ b/zebra-network/src/constants.rs
@@ -109,7 +109,7 @@ pub const TIMESTAMP_TRUNCATION_SECONDS: u32 = 30 * 60;
 /// [BIP 14]: https://github.com/bitcoin/bips/blob/master/bip-0014.mediawiki
 //
 // TODO: generate this from crate metadata (#2375)
-pub const USER_AGENT: &str = "/Zebra:1.0.0-alpha.18/";
+pub const USER_AGENT: &str = "/Zebra:1.0.0-alpha.19/";
 
 /// The Zcash network protocol version implemented by this crate, and advertised
 /// during connection setup.
diff --git a/zebra-script/Cargo.toml b/zebra-script/Cargo.toml
index dddad5fd..68518866 100644
--- a/zebra-script/Cargo.toml
+++ b/zebra-script/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "zebra-script"
-version = "1.0.0-alpha.19"
+version = "1.0.0-alpha.20"
 authors = ["Zcash Foundation <zebra@zfnd.org>"]
 license = "MIT OR Apache-2.0"
 edition = "2018"
diff --git a/zebra-state/Cargo.toml b/zebra-state/Cargo.toml
index aeb06d25..b8790991 100644
--- a/zebra-state/Cargo.toml
+++ b/zebra-state/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "zebra-state"
-version = "1.0.0-alpha.18"
+version = "1.0.0-alpha.19"
 authors = ["Zcash Foundation <zebra@zfnd.org>"]
 license = "MIT OR Apache-2.0"
 edition = "2018"
diff --git a/zebra-test/Cargo.toml b/zebra-test/Cargo.toml
index 4c2ce515..f227158b 100644
--- a/zebra-test/Cargo.toml
+++ b/zebra-test/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "zebra-test"
-version = "1.0.0-alpha.15"
+version = "1.0.0-alpha.16"
 authors = ["Zcash Foundation <zebra@zfnd.org>"]
 license = "MIT OR Apache-2.0"
 edition = "2018"
diff --git a/zebra-utils/Cargo.toml b/zebra-utils/Cargo.toml
index 2ec85023..facba1d0 100644
--- a/zebra-utils/Cargo.toml
+++ b/zebra-utils/Cargo.toml
@@ -2,7 +2,7 @@
 name = "zebra-utils"
 authors = ["Zcash Foundation <zebra@zfnd.org>"]
 license = "MIT OR Apache-2.0"
-version = "1.0.0-alpha.18"
+version = "1.0.0-alpha.19"
 edition = "2018"
 # Prevent accidental publication of this utility crate.
 publish = false
diff --git a/zebrad/Cargo.toml b/zebrad/Cargo.toml
index 082b2c4b..6b4019cc 100644
--- a/zebrad/Cargo.toml
+++ b/zebrad/Cargo.toml
@@ -2,7 +2,7 @@
 name = "zebrad"
 authors = ["Zcash Foundation <zebra@zfnd.org>"]
 license = "MIT OR Apache-2.0"
-version = "1.0.0-alpha.18"
+version = "1.0.0-alpha.19"
 edition = "2018"
 repository = "https://github.com/ZcashFoundation/zebra"
 # make `cargo run` use `zebrad` by default