diff --git a/Cargo.lock b/Cargo.lock
index 6ec87c6..2a78751 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -177,7 +177,7 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "chorus"
-version = "0.8.1"
+version = "0.9.0"
 dependencies = [
  "async-trait",
  "base64 0.21.3",
diff --git a/Cargo.toml b/Cargo.toml
index 9055ee9..b8de308 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "chorus"
 description = "A library for interacting with multiple Spacebar-compatible Instances at once."
-version = "0.8.1"
+version = "0.9.0"
 license = "AGPL-3.0"
 edition = "2021"
 repository = "https://github.com/polyphony-chat/chorus"
diff --git a/src/errors.rs b/src/errors.rs
index 11a7632..4099a6b 100644
--- a/src/errors.rs
+++ b/src/errors.rs
@@ -4,7 +4,7 @@ use custom_error::custom_error;
 use crate::types::WebSocketEvent;
 
 custom_error! {
-    #[derive(PartialEq, Eq)]
+    #[derive(PartialEq, Eq, Clone, Hash)]
     pub RegistrationError
     Consent = "Consent must be 'true' to register.",
 }
@@ -12,7 +12,7 @@ custom_error! {
 pub type ChorusResult<T> = std::result::Result<T, ChorusError>;
 
 custom_error! {
-    #[derive(Clone)]
+    #[derive(Clone, Hash, PartialEq, Eq)]
     pub ChorusError
     /// Server did not respond.
     NoResponse = "Did not receive a response from the Server.",