diff --git a/Cargo.lock b/Cargo.lock
index 23f43c6..d981cb3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -88,7 +88,7 @@ name = "bluejay-core"
 version = "0.3.1"
 dependencies = [
  "enum-as-inner",
- "itertools 0.14.0",
+ "itertools 0.15.0",
  "serde_json",
  "strum",
 ]
@@ -113,7 +113,7 @@ dependencies = [
  "criterion 0.7.0",
  "enum-as-inner",
  "insta",
- "itertools 0.14.0",
+ "itertools 0.15.0",
  "logos",
  "self_cell",
  "serde",
@@ -159,7 +159,7 @@ dependencies = [
  "bluejay-parser",
  "bluejay-validator",
  "convert_case",
- "itertools 0.14.0",
+ "itertools 0.15.0",
  "proc-macro2",
  "quote",
  "syn",
@@ -185,7 +185,7 @@ dependencies = [
  "bluejay-parser",
  "criterion 0.7.0",
  "insta",
- "itertools 0.14.0",
+ "itertools 0.15.0",
  "once_cell",
  "paste",
  "seq-macro",
@@ -637,9 +637,9 @@ dependencies = [
 
 [[package]]
 name = "itertools"
-version = "0.14.0"
+version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b192c782037fadd9cfa75548310488aabdbf3d2da73885b31bd0abd03351285"
+checksum = "8b4baf93f58d4425749ca49a51c50ebab072c5df6994d08fed93541c331481dc"
 dependencies = [
  "either",
 ]
diff --git a/bluejay-core/Cargo.toml b/bluejay-core/Cargo.toml
index 22e01f9..d8c4481 100644
--- a/bluejay-core/Cargo.toml
+++ b/bluejay-core/Cargo.toml
@@ -13,7 +13,7 @@ description = "Base GraphQL abstractions"
 strum = { version = "0.28", features = ["derive"] }
 serde_json = { version = "1.0", optional = true }
 enum-as-inner = "0.7"
-itertools = "0.14.0"
+itertools = "0.15.0"
 
 [features]
 serde_json = ["dep:serde_json"]
diff --git a/bluejay-parser/Cargo.toml b/bluejay-parser/Cargo.toml
index aa8f1c5..81a086b 100644
--- a/bluejay-parser/Cargo.toml
+++ b/bluejay-parser/Cargo.toml
@@ -16,7 +16,7 @@ ariadne = { version = "0.5.0" }
 serde = { version = "1.0.203", optional = true }
 bluejay-core = { workspace = true }
 strum = { version = "0.28", features = ["derive"] }
-itertools = "0.14.0"
+itertools = "0.15.0"
 
 [dev-dependencies]
 criterion = "0.7"
diff --git a/bluejay-typegen-codegen/Cargo.toml b/bluejay-typegen-codegen/Cargo.toml
index d5a4bcb..49e6a90 100644
--- a/bluejay-typegen-codegen/Cargo.toml
+++ b/bluejay-typegen-codegen/Cargo.toml
@@ -19,7 +19,7 @@ proc-macro2 = "1.0"
 convert_case = "0.10"
 # Pin: v1.13+ requires Rust 1.86+. Remove once toolchain is upgraded.
 unicode-segmentation = ">=1.11, <1.13"
-itertools = "0.14.0"
+itertools = "0.15.0"
 
 [lints]
 workspace = true
diff --git a/bluejay-validator/Cargo.toml b/bluejay-validator/Cargo.toml
index 9674eb1..28dfd98 100644
--- a/bluejay-validator/Cargo.toml
+++ b/bluejay-validator/Cargo.toml
@@ -13,7 +13,7 @@ description = "A GraphQL validator"
 bluejay-core = { workspace = true }
 bluejay-parser = { workspace = true, optional = true, features = ["format-errors"] }
 paste = "1.0"
-itertools = "0.14.0"
+itertools = "0.15.0"
 serde_json = { version = "1.0", optional = true }
 seq-macro = "0.3.5"