diff --git a/Cargo.toml b/Cargo.toml
index a796249e..1898eb96 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,7 @@ authors = [
     "Alex Tokarev <aleksator@gmail.com>",
     "Jacob Finkelman <Eh2406@wayne.edu>",
 ]
-edition = "2018"
+edition = "2021"
 description = "PubGrub version solving algorithm"
 readme = "README.md"
 repository = "https://github.com/pubgrub-rs/pubgrub"
diff --git a/src/internal/small_vec.rs b/src/internal/small_vec.rs
index 4c2a97df..fa720435 100644
--- a/src/internal/small_vec.rs
+++ b/src/internal/small_vec.rs
@@ -166,9 +166,9 @@ impl<T> IntoIterator for SmallVec<T> {
     fn into_iter(self) -> Self::IntoIter {
         match self {
             SmallVec::Empty => SmallVecIntoIter::Empty,
-            SmallVec::One(a) => SmallVecIntoIter::One(IntoIterator::into_iter(a)),
-            SmallVec::Two(a) => SmallVecIntoIter::Two(IntoIterator::into_iter(a)),
-            SmallVec::Flexible(v) => SmallVecIntoIter::Flexible(IntoIterator::into_iter(v)),
+            SmallVec::One(a) => SmallVecIntoIter::One(a.into_iter()),
+            SmallVec::Two(a) => SmallVecIntoIter::Two(a.into_iter()),
+            SmallVec::Flexible(v) => SmallVecIntoIter::Flexible(v.into_iter()),
         }
     }
 }