diff --git a/libs/apkverify/src/algorithms.rs b/libs/apkverify/src/algorithms.rs
index 442b47c..c05ab38 100644
--- a/libs/apkverify/src/algorithms.rs
+++ b/libs/apkverify/src/algorithms.rs
@@ -204,9 +204,10 @@
 }
 
 /// Hash algorithms.
-#[derive(Clone, Copy, Debug, PartialEq, Eq, FromPrimitive, ToPrimitive)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq, FromPrimitive, ToPrimitive, Default)]
 #[repr(u32)]
 pub enum HashAlgorithm {
+    #[default]
     /// SHA-256
     SHA256 = 1,
 }
@@ -217,9 +218,3 @@
         Self::from_u32(val).context(format!("Unsupported hash algorithm: {}", val))
     }
 }
-
-impl Default for HashAlgorithm {
-    fn default() -> Self {
-        HashAlgorithm::SHA256
-    }
-}
diff --git a/libs/apkverify/src/v4.rs b/libs/apkverify/src/v4.rs
index 94abf99..e77ad77 100644
--- a/libs/apkverify/src/v4.rs
+++ b/libs/apkverify/src/v4.rs
@@ -104,9 +104,10 @@
 }
 
 /// Version of the idsig file format
-#[derive(Debug, PartialEq, Eq, FromPrimitive, ToPrimitive)]
+#[derive(Debug, PartialEq, Eq, FromPrimitive, ToPrimitive, Default)]
 #[repr(u32)]
 pub enum Version {
+    #[default]
     /// Version 2, the only supported version.
     V2 = 2,
 }
@@ -117,12 +118,6 @@
     }
 }
 
-impl Default for Version {
-    fn default() -> Self {
-        Version::V2
-    }
-}
-
 impl V4Signature<fs::File> {
     /// Creates a `V4Signature` struct from the given idsig path.
     pub fn from_idsig_path<P: AsRef<Path>>(idsig_path: P) -> Result<Self> {