diff --git a/src/manifest.rs b/src/manifest.rs
index 0ab2fa7..d9cff78 100644
--- a/src/manifest.rs
+++ b/src/manifest.rs
@@ -7,7 +7,7 @@ use std::path::PathBuf;
 
 #[derive(Serialize, Debug)]
 pub struct Manifest {
-    #[serde(rename = "cargo-features")]
+    #[serde(rename = "cargo-features", skip_serializing_if = "Vec::is_empty")]
     pub cargo_features: Vec<String>,
     pub package: Package,
     #[serde(skip_serializing_if = "Map::is_empty")]