diff --git a/crates/bpe/Cargo.toml b/crates/bpe/Cargo.toml
index 9b0b046a..de265a11 100644
--- a/crates/bpe/Cargo.toml
+++ b/crates/bpe/Cargo.toml
@@ -20,7 +20,7 @@ tiktoken = ["dep:base64"]
 aneubeck-daachorse = "1.1.1"
 base64 = { version = "0.22", optional = true }
 fnv = "1.0"
-itertools = "0.14"
+itertools = "0.15"
 rand = { version = "0.10", optional = true }
 serde = { version = "1", features = ["derive"] }
 
diff --git a/crates/bpe/tests/Cargo.toml b/crates/bpe/tests/Cargo.toml
index b30b70e6..c6747181 100644
--- a/crates/bpe/tests/Cargo.toml
+++ b/crates/bpe/tests/Cargo.toml
@@ -5,6 +5,6 @@ edition = "2021"
 [dependencies]
 bpe = { path = "../../bpe", features = ["rand"] }
 bpe-openai = { path = "../../bpe-openai" }
-itertools = "0.14"
+itertools = "0.15"
 rand = "0.10"
 tiktoken-rs = "0.12"
diff --git a/crates/geo_filters/Cargo.toml b/crates/geo_filters/Cargo.toml
index 62670385..d039a0e0 100644
--- a/crates/geo_filters/Cargo.toml
+++ b/crates/geo_filters/Cargo.toml
@@ -28,7 +28,7 @@ evaluation = [
 clap = { version = "4", optional = true, features = ["derive"] }
 fnv = "1.0"
 hyperloglogplus = { version = "0.4", optional = true }
-itertools = "0.14"
+itertools = "0.15"
 once_cell = "1.18"
 rand = { version = "0.10", optional = true }
 rayon = { version = "1.7", optional = true }
diff --git a/crates/hash-sorted-map/benchmarks/Cargo.toml b/crates/hash-sorted-map/benchmarks/Cargo.toml
index d0ae1f13..af726612 100644
--- a/crates/hash-sorted-map/benchmarks/Cargo.toml
+++ b/crates/hash-sorted-map/benchmarks/Cargo.toml
@@ -21,4 +21,4 @@ rustc-hash = "2"
 ahash = "0.8"
 foldhash = "0.2"
 fnv = "1"
-itertools = "0.14"
+itertools = "0.15"