diff --git a/lib/src/crypto/hash.rs b/lib/src/crypto/hash.rs
index b8c31daa3..ac3923fd1 100644
--- a/lib/src/crypto/hash.rs
+++ b/lib/src/crypto/hash.rs
@@ -138,7 +138,7 @@ pub trait Hashable {
     }
 }
 
-impl<T> Hashable for &T
+impl<T> Hashable for &'_ T
 where
     T: Hashable + ?Sized,
 {
diff --git a/lib/src/version_vector.rs b/lib/src/version_vector.rs
index 1c8fed72b..7666d9a65 100644
--- a/lib/src/version_vector.rs
+++ b/lib/src/version_vector.rs
@@ -146,7 +146,7 @@ impl FromIterator<(PublicKey, u64)> for VersionVector {
     }
 }
 
-impl Add for &VersionVector {
+impl Add for &'_ VersionVector {
     type Output = VersionVector;
 
     fn add(self, other: Self) -> Self::Output {