diff --git a/Cargo.lock b/Cargo.lock
index 0b2ef31..cc4c518 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -85,9 +85,9 @@ dependencies = [
 
 [[package]]
 name = "itertools"
-version = "0.9.0"
+version = "0.11.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "284f18f85651fe11e8a991b2adb42cb078325c996ed026d994719efcfca1d54b"
+checksum = "b1c173a5686ce8bfa551b3563d0c2170bf24ca44da99c7ca4bfdab5418c3fe57"
 dependencies = [
  "either",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index eb11723..2aa9e62 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -21,7 +21,7 @@ argparse = "0.2.2"
 defaultmap = "0.5.0"
 float-ord = "0.2.0"
 group-by = "1.0.0"
-itertools = "0.9.0"
+itertools = "0.11.0"
 peg = "0.6.3"
 permutation = "0.4.1"
 string-intern = { version ="0.1.7", default-features = false }