diff --git a/Cargo.lock b/Cargo.lock
index 3183959b..058523f5 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -692,7 +692,7 @@ dependencies = [
  "clap",
  "criterion-plot",
  "csv",
- "itertools 0.10.1",
+ "itertools 0.10.3",
  "lazy_static",
  "num-traits",
  "oorandom",
@@ -1682,9 +1682,9 @@ dependencies = [
 
 [[package]]
 name = "itertools"
-version = "0.10.1"
+version = "0.10.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "69ddb889f9d0d08a67338271fa9b62996bc788c7796a5c18cf057420aaed5eaf"
+checksum = "a9a9d19fa1e79b6215ff29b9d6880b706147f16e9b1dbb1e4e5947b5b02bc5e3"
 dependencies = [
  "either",
 ]
@@ -4353,7 +4353,7 @@ dependencies = [
  "halo2",
  "hex",
  "incrementalmerkletree",
- "itertools 0.10.1",
+ "itertools 0.10.3",
  "jubjub 0.8.0",
  "lazy_static",
  "orchard",
@@ -4488,7 +4488,7 @@ dependencies = [
  "futures",
  "halo2",
  "hex",
- "itertools 0.10.1",
+ "itertools 0.10.3",
  "jubjub 0.8.0",
  "lazy_static",
  "metrics",
diff --git a/zebra-chain/Cargo.toml b/zebra-chain/Cargo.toml
index cbe89ea1..f33724de 100644
--- a/zebra-chain/Cargo.toml
+++ b/zebra-chain/Cargo.toml
@@ -31,7 +31,7 @@ group = "0.11.0"
 halo2 = "=0.1.0-beta.1"
 hex = "0.4"
 incrementalmerkletree = "0.1.0"
-itertools = "0.10.1"
+itertools = "0.10.3"
 jubjub = "0.8.0"
 lazy_static = "1.4.0"
 rand_core = "0.6"
@@ -71,7 +71,7 @@ zebra-test = { path = "../zebra-test/", optional = true }
 [dev-dependencies]
 color-eyre = "0.5.11"
 criterion = { version = "0.3", features = ["html_reports"] }
-itertools = "0.10.1"
+itertools = "0.10.3"
 spandoc = "0.2"
 tracing = "0.1.29"
 
diff --git a/zebra-state/Cargo.toml b/zebra-state/Cargo.toml
index 7e184744..41518cea 100644
--- a/zebra-state/Cargo.toml
+++ b/zebra-state/Cargo.toml
@@ -44,7 +44,7 @@ once_cell = "1.8"
 # TODO: replace w/ crate version when released: https://github.com/ZcashFoundation/zebra/issues/2083
 # Note: if updating this, also update the workspace Cargo.toml to match.
 halo2 = "=0.1.0-beta.1"
-itertools = "0.10.1"
+itertools = "0.10.3"
 jubjub = "0.8.0"
 proptest = "0.10.1"
 proptest-derive = "0.3"