diff --git a/src/cosine.rs b/src/cosine.rs
index 94d6b3a..f36b2a6 100644
--- a/src/cosine.rs
+++ b/src/cosine.rs
@@ -48,7 +48,7 @@ where
         );
         let numerator = self.dot(&rhs);
         let denominator = self.powi(2).sum().sqrt() * rhs.powi(2).sum().sqrt();
-        Ok(numerator / denominator)
+        Ok((numerator / denominator).clamp(T::zero(), T::one()))
     }
 }