diff --git a/src/bin/syndicate-server.rs b/src/bin/syndicate-server.rs
index f44441a..82cafeb 100644
--- a/src/bin/syndicate-server.rs
+++ b/src/bin/syndicate-server.rs
@@ -22,24 +22,20 @@ fn other_eio<E: std::fmt::Display>(e: E) -> std::io::Error {
     std::io::Error::new(std::io::ErrorKind::Other, e.to_string())
 }
 
-fn translate_sink_err(e: tungstenite::Error) -> packets::EncodeError {
-    packets::EncodeError::Write(other_eio(e))
-}
-
 fn encode_message(codec: &value::Codec<V, Syndicate>, p: packets::S2C) ->
-    Result<Message, packets::EncodeError>
+    Result<Message, std::io::Error>
 {
     use serde::ser::Serialize;
     use preserves::ser::Serializer;
     let mut bs = Vec::with_capacity(128);
     let mut ser: Serializer<_, V, Syndicate> =
         Serializer::new(&mut bs, codec.encode_placeholders.as_ref());
-    p.serialize(&mut ser).map_err(|e| std::io::Error::from(e))?;
+    p.serialize(&mut ser)?;
     Ok(Message::Binary(bs))
 }
 
 fn message_encoder(codec: &value::Codec<V, Syndicate>)
-    -> impl Fn(packets::S2C) -> futures::future::Ready<Result<Message, packets::EncodeError>> + '_
+    -> impl Fn(packets::S2C) -> futures::future::Ready<Result<Message, std::io::Error>> + '_
 {
     return move |p| futures::future::ready(encode_message(codec, p));
 }
@@ -97,7 +93,7 @@ async fn run_connection(connid: ConnId,
                 let (o, i) = s.split();
                 let codec = packets::standard_preserves_codec();
                 let i = i.map(message_decoder(&codec));
-                let o = o.sink_map_err(translate_sink_err).with(message_encoder(&codec));
+                let o = o.sink_map_err(other_eio).with(message_encoder(&codec));
                 let mut p = Peer::new(connid, i, o);
                 p.run(spaces, &config).await?
             },
diff --git a/src/dataspace.rs b/src/dataspace.rs
index fb59dc1..4dd1cba 100644
--- a/src/dataspace.rs
+++ b/src/dataspace.rs
@@ -138,8 +138,7 @@ impl Dataspace {
                 packets::Action::Assert(ref epname, ref assertion) => {
                     let ac = self.peers.get_mut(&id).unwrap();
                     if ac.endpoints.contains_key(&epname) {
-                        return Err(("Duplicate endpoint name".to_string(),
-                                    value::to_value(a).unwrap()));
+                        return Err(("Duplicate endpoint name".to_string(), value::to_value(a)));
                     }
 
                     let ar =
@@ -171,8 +170,7 @@ impl Dataspace {
                     let ac = self.peers.get_mut(&id).unwrap();
                     match ac.endpoints.remove(epname) {
                         None => {
-                            return Err(("Nonexistent endpoint name".to_string(),
-                                        value::to_value(a).unwrap()));
+                            return Err(("Nonexistent endpoint name".to_string(), value::to_value(a)));
                         }
                         Some(ep) => {
                             self.remove_endpoint(&mut outbound_turns, id, epname, ep);
diff --git a/src/packets.rs b/src/packets.rs
index 292fe9e..daa7837 100644
--- a/src/packets.rs
+++ b/src/packets.rs
@@ -47,7 +47,7 @@ pub enum S2C {
 #[derive(Debug)]
 pub enum DecodeError {
     Read(io::Error),
-    Parse(value::error::Error<Syndicate>, V),
+    Parse(value::de::error::Error<Syndicate>, V),
 }
 
 impl From<io::Error> for DecodeError {
@@ -67,45 +67,6 @@ impl std::error::Error for DecodeError {
 
 //---------------------------------------------------------------------------
 
-#[derive(Debug)]
-pub enum EncodeError {
-    Write(io::Error),
-    Unparse(value::error::Error<Syndicate>),
-}
-
-impl From<io::Error> for EncodeError {
-    fn from(v: io::Error) -> Self {
-        EncodeError::Write(v)
-    }
-}
-
-impl From<value::error::Error<Syndicate>> for EncodeError {
-    fn from(v: value::error::Error<Syndicate>) -> Self {
-        EncodeError::Unparse(v)
-    }
-}
-
-impl From<EncodeError> for io::Error {
-    fn from(v: EncodeError) -> Self {
-        match v {
-            EncodeError::Write(e) => e,
-            EncodeError::Unparse(e) =>
-                Self::new(io::ErrorKind::InvalidData, format!("{:?}", e)),
-        }
-    }
-}
-
-impl std::fmt::Display for EncodeError {
-    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
-        write!(f, "{:?}", self)
-    }
-}
-
-impl std::error::Error for EncodeError {
-}
-
-//---------------------------------------------------------------------------
-
 pub struct Codec<InT, OutT> {
     codec: value::Codec<V, Syndicate>,
     ph_in: PhantomData<InT>,
@@ -161,7 +122,7 @@ impl<InT: serde::de::DeserializeOwned, OutT> tokio_util::codec::Decoder for Code
 
 impl<InT, OutT: serde::Serialize> tokio_util::codec::Encoder<OutT> for Codec<InT, OutT>
 {
-    type Error = EncodeError;
+    type Error = io::Error;
     fn encode(&mut self, item: OutT, bs: &mut BytesMut) -> Result<(), Self::Error> {
         let mut w = bs.writer();
         let mut ser: Serializer<_, V, Syndicate> = Serializer::new(&mut w, self.codec.encode_placeholders.as_ref());
diff --git a/src/peer.rs b/src/peer.rs
index de1595a..797dd0a 100644
--- a/src/peer.rs
+++ b/src/peer.rs
@@ -20,7 +20,7 @@ pub type ResultC2S = Result<packets::C2S, packets::DecodeError>;
 
 pub struct Peer<I, O>
 where I: Stream<Item = ResultC2S> + Send,
-      O: Sink<packets::S2C, Error = packets::EncodeError>,
+      O: Sink<packets::S2C, Error = std::io::Error>,
 {
     id: ConnId,
     tx: UnboundedSender<packets::S2C>,
@@ -36,7 +36,7 @@ fn err(s: &str, ctx: V) -> packets::S2C {
 
 impl<I, O> Peer<I, O>
 where I: Stream<Item = ResultC2S> + Send,
-      O: Sink<packets::S2C, Error = packets::EncodeError>,
+      O: Sink<packets::S2C, Error = std::io::Error>,
 {
     pub fn new(id: ConnId, i: I, o: O) -> Self {
         let (tx, rx) = unbounded_channel();
@@ -116,7 +116,7 @@ where I: Stream<Item = ResultC2S> + Send,
                                 packets::C2S::Pong() =>
                                     (),
                                 packets::C2S::Connect(_) => {
-                                    to_send.push(err("Unexpected Connect", value::to_value(p).unwrap()));
+                                    to_send.push(err("Unexpected Connect", value::to_value(p)));
                                     running = false;
                                 }
                             }
@@ -184,7 +184,7 @@ where I: Stream<Item = ResultC2S> + Send,
 
 impl<I, O> Drop for Peer<I, O>
 where I: Stream<Item = ResultC2S> + Send,
-      O: Sink<packets::S2C, Error = packets::EncodeError>,
+      O: Sink<packets::S2C, Error = std::io::Error>,
 {
     fn drop(&mut self) {
         if let Some(ref s) = self.space {