diff --git a/prost-build/Cargo.toml b/prost-build/Cargo.toml
index 2f9fc7c..b55280f 100644
--- a/prost-build/Cargo.toml
+++ b/prost-build/Cargo.toml
@@ -17,7 +17,7 @@ cleanup-markdown = ["dep:pulldown-cmark", "dep:pulldown-cmark-to-cmark"]
 [dependencies]
 bytes = { version = "1", default-features = false }
 heck = { version = ">=0.4, <=0.5" }
-itertools = { version = ">=0.10, <=0.13", default-features = false, features = ["use_alloc"] }
+itertools = { version = ">=0.10, <=0.14", default-features = false, features = ["use_alloc"] }
 log = "0.4.4"
 multimap = { version = ">=0.8, <=0.10", default-features = false }
 petgraph = { version = "0.6", default-features = false }
diff --git a/prost-derive/Cargo.toml b/prost-derive/Cargo.toml
index 32eecad..5dd0c5b 100644
--- a/prost-derive/Cargo.toml
+++ b/prost-derive/Cargo.toml
@@ -14,7 +14,7 @@ proc-macro = true
 
 [dependencies]
 anyhow = "1.0.1"
-itertools = ">=0.10.1, <=0.13"
+itertools = ">=0.10.1, <=0.14"
 proc-macro2 = "1.0.60"
 quote = "1"
 syn = { version = "2", features = ["extra-traits"] }