diff --git a/argon2/src/lib.rs b/argon2/src/lib.rs
index 21e04abf..4cd0c63c 100644
--- a/argon2/src/lib.rs
+++ b/argon2/src/lib.rs
@@ -172,6 +172,11 @@ pub struct Argon2<'key> {
     #[cfg(any(target_arch = "x86", target_arch = "x86_64"))]
     cpu_feat_avx2: avx2_cpuid::InitToken,
 }
+impl Default for Argon2<'_> {
+    fn default() -> Self {
+        Self::new(Algorithm::default(), Version::default(), Params::default())
+    }
+}
 
 impl fmt::Debug for Argon2<'_> {
     fn fmt(&self, fmt: &mut fmt::Formatter<'_>) -> fmt::Result {