diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0776840..24bd614 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 ## Changes between the versions
 
+### 0.3.1
+
+* Update [iana-time-zone](https://crates.io/crates/iana-time-zone) to implement
+  [`local_tz()`](https://docs.rs/tzdb/0.2.6/tzdb/fn.local_tz.html) for
+  iOS ([#41](https://github.com/strawlab/iana-time-zone/pull/41))
+
 ### 0.3.0
 
 * Remove serde-as feature. The feature is very unrelated to goals of the crate, so it should be
diff --git a/Cargo.lock b/Cargo.lock
index 16d07f3..220dd47 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -22,9 +22,9 @@ checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
 
 [[package]]
 name = "bit-set"
-version = "0.5.2"
+version = "0.5.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6e11e16035ea35e4e5997b393eacbf6f63983188f7a2ad25bfb13465f5ad59de"
+checksum = "0700ddab506f33b20a03b13996eccd309a48e5ff77d0d95926aa0210fb4e95f1"
 dependencies = [
  "bit-vec",
 ]
@@ -101,9 +101,9 @@ checksum = "3f107b87b6afc2a64fd13cac55fe06d6c8859f12d4b14cbcdd2c67d0976781be"
 
 [[package]]
 name = "fastrand"
-version = "1.7.0"
+version = "1.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c3fcf0cee53519c866c09b5de1f6c56ff9d647101f81c1964fa632e148896cdf"
+checksum = "a7a407cfaa3385c4ae6b23e84623d48c2798d06e3e6a1878f7f59f17b3f86499"
 dependencies = [
  "instant",
 ]
@@ -133,9 +133,9 @@ checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
 
 [[package]]
 name = "iana-time-zone"
-version = "0.1.35"
+version = "0.1.37"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "be8185498dab35f87e740e2a878ec92b2241ef2c12ac85680f8ba7491f1ed76b"
+checksum = "97d0b780e72fefba5e04a8359137b0a5687a44cc893dbda904fcf8a93f2f07e7"
 dependencies = [
  "core-foundation",
  "js-sys",
@@ -361,9 +361,9 @@ dependencies = [
 
 [[package]]
 name = "redox_syscall"
-version = "0.2.13"
+version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "62f25bc4c7e55e0b0b7a1d43fb893f4fa1361d0abe38b9ce4f323c2adfe6ef42"
+checksum = "534cfe58d6a18cc17120fbf4635d53d14691c1fe4d951064df9bd326178d7d5a"
 dependencies = [
  "bitflags",
 ]
@@ -503,7 +503,7 @@ dependencies = [
 
 [[package]]
 name = "tzdb"
-version = "0.3.0"
+version = "0.3.1"
 dependencies = [
  "byte-slice-cast",
  "iana-time-zone",
diff --git a/Cargo.toml b/Cargo.toml
index 6986485..1245204 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "tzdb"
-version = "0.3.0"
+version = "0.3.1"
 edition = "2018"
 authors = ["René Kijewski <crates.io@k6i.de>"]
 repository = "https://github.com/Kijewski/tzdb"
@@ -16,7 +16,7 @@ tz-rs = { version = "^0.6.11", features = ["const"] }
 
 # optional dependencies
 byte-slice-cast = { version = "^1.0.0", optional = true }
-iana-time-zone = { version = "^0.1.35", optional = true }
+iana-time-zone = { version = "^0.1.37", optional = true }
 phf = { version = "^0.10.0", default-features = false, optional = true }
 phf_shared = { version = "^0.10.0", default-features = false, optional = true }