diff --git a/CHANGELOG.md b/CHANGELOG.md
index 04054ed..499c927 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+jmap-client 0.3.0
+================================
+- Set timeouts using `Duration` instead of `u64`.
+- SetError handling of unknown properties.
+
 jmap-client 0.2.1
 ================================
 - Using maybe_async to reduce duplicate code.
diff --git a/Cargo.toml b/Cargo.toml
index 406bd18..50b2b97 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "jmap-client"
 description = "JMAP client library for Rust"
-version = "0.2.1"
+version = "0.3.0"
 edition = "2021"
 authors = [ "Stalwart Labs Ltd. <hello@stalw.art>"]
 license = "Apache-2.0 OR MIT"
diff --git a/src/email/mod.rs b/src/email/mod.rs
index 72d084b..75b96c4 100644
--- a/src/email/mod.rs
+++ b/src/email/mod.rs
@@ -323,6 +323,7 @@ pub enum Property {
     HasAttachment,
     Preview,
     Header(Header),
+    Other(String),
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -386,7 +387,7 @@ impl Property {
             "attachments" => Some(Property::Attachments),
             "bodyStructure" => Some(Property::BodyStructure),
             _ if value.starts_with("header:") => Some(Property::Header(Header::parse(value)?)),
-            _ => None,
+            _ => Some(Property::Other(value.to_string())),
         }
     }
 }
@@ -420,6 +421,7 @@ impl Display for Property {
             Property::HasAttachment => write!(f, "hasAttachment"),
             Property::Preview => write!(f, "preview"),
             Property::Header(header) => header.fmt(f),
+            Property::Other(other) => write!(f, "{}", other),
         }
     }
 }