diff --git a/Cargo.lock b/Cargo.lock
index 5b08e4f..ce12e5d 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -29,12 +29,6 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6184e33543162437515c2e2b48714794e37845ec9851711914eec9d308f6ebe8"
 
-[[package]]
-name = "either"
-version = "1.9.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a26ae43d7bcc3b814de94796a5e736d4029efb0ee900c12e2d54c993ad1a1e07"
-
 [[package]]
 name = "float-cmp"
 version = "0.9.0"
@@ -44,15 +38,6 @@ dependencies = [
  "num-traits",
 ]
 
-[[package]]
-name = "itertools"
-version = "0.12.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "25db6b064527c5d482d0423354fcd07a89a2dfe07b67892e62411946db7f07b0"
-dependencies = [
- "either",
-]
-
 [[package]]
 name = "memchr"
 version = "2.5.0"
@@ -81,7 +66,6 @@ dependencies = [
  "anstyle",
  "difflib",
  "float-cmp",
- "itertools",
  "normalize-line-endings",
  "predicates-core",
  "predicates-tree",
diff --git a/Cargo.toml b/Cargo.toml
index 3c0c6c8..78d7b05 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -53,7 +53,6 @@ difflib = { version = "0.4", optional = true }
 normalize-line-endings = { version = "0.3.0", optional = true }
 regex = { version="1.0", optional = true }
 float-cmp = { version="0.9", optional = true }
-itertools = "0.12"
 anstyle = "1.0.0"
 
 [dev-dependencies]
diff --git a/src/str/difference.rs b/src/str/difference.rs
index 6c4de21..81c62b8 100644
--- a/src/str/difference.rs
+++ b/src/str/difference.rs
@@ -46,10 +46,8 @@ impl Predicate<str> for DifferencePredicate {
             diff.insert(0, "\n".to_owned());
 
             Some(
-                reflection::Case::new(Some(self), result).add_product(reflection::Product::new(
-                    "diff",
-                    itertools::join(diff.iter(), ""),
-                )),
+                reflection::Case::new(Some(self), result)
+                    .add_product(reflection::Product::new("diff", diff.join(""))),
             )
         }
     }