diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5683598..5365a38 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
 ## Changes between the versions
 
+### 0.5.6 (2023-03-24)
+
+* Update to Time Zone Database release [2023b](https://mm.icann.org/pipermail/tz-announce/2023-March/000078.html)
+
 ### 0.5.5 (2023-03-24)
 
 * Update to Time Zone Database release [2023a](https://mm.icann.org/pipermail/tz-announce/2023-March/000077.html)
diff --git a/Cargo.toml b/Cargo.toml
index 37acd33..34c7fb1 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "tzdb"
-version = "0.5.5"
+version = "0.5.6"
 edition = "2018"
 authors = ["René Kijewski <crates.io@k6i.de>"]
 repository = "https://github.com/Kijewski/tzdb"
diff --git a/Makefile b/Makefile
index 92627ea..a17235d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 .DELETE_ON_ERROR:
 
-TZDB_VERSION := tzdb-2023a
+TZDB_VERSION := tzdb-2023b
 
 src/generated/mod.rs: tmp/${TZDB_VERSION}/usr/share/zoneinfo/
 	cargo r --package make-tzdb --bin make-tzdb -- $(@D) $< tzdb.tar.lz.sha
diff --git a/README.md b/README.md
index 5a1f2aa..b12548d 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 Static time zone information for [tz-rs](https://crates.io/crates/tz-rs).
 
 This crate provides all time zones found in the [Time Zone Database](https://www.iana.org/time-zones),
-currently in the version 2023a (released 2023-03-22).
+currently in the version 2023b (released 2023-03-23).
 
 See the documentation for a full list the the contained time zones:
 <https://docs.rs/tzdb/latest/tzdb/time_zone/index.html>
diff --git a/fuzz/.gitignore b/fuzz/.gitignore
new file mode 100644
index 0000000..98e70c0
--- /dev/null
+++ b/fuzz/.gitignore
@@ -0,0 +1 @@
+/corpus
diff --git a/src/generated b/src/generated
index 66030a0..9a3d52b 160000
--- a/src/generated
+++ b/src/generated
@@ -1 +1 @@
-Subproject commit 66030a03cde8a031ef738ea04e5223e864838f0f
+Subproject commit 9a3d52ba7fe892ecd78d8cc1e29666350737f232
diff --git a/src/lib.rs b/src/lib.rs
index 0ef72e6..d6d7533 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -43,7 +43,7 @@
 //! Static time zone information for [tz-rs](https://crates.io/crates/tz-rs).
 //!
 //! This crate provides all time zones found in the [Time Zone Database](https://www.iana.org/time-zones),
-//! currently in the version 2023a (released 2023-03-22).
+//! currently in the version 2023b (released 2023-03-23).
 //!
 //! See the documentation for a full list the the contained time zones:
 //! <https://docs.rs/tzdb/latest/tzdb/time_zone/index.html>
diff --git a/tzdb.tar.lz.sha b/tzdb.tar.lz.sha
index 9a89acd..950588a 100644
--- a/tzdb.tar.lz.sha
+++ b/tzdb.tar.lz.sha
@@ -1 +1 @@
-8e959f6cad84e9481ed5a6efcc8d7126d41fadfdc860715fea87fb15f7dcfdbc4c9d49828df2945ee9304dbdd3370c5b5048c62637bdd4f4962830ba101008bd  tmp/tzdb-2023a.tar.lz
+286ab1bf768dda48d4066d2477de0f3db9c26e55e26c1a4f33b450268255f28d57360bffe602a3bc29f8a281b7e0ff17880fe1d14914d6361f62abb7526e5081  tmp/tzdb-2023b.tar.lz