diff --git a/Cargo.lock b/Cargo.lock
index fcbd3f6..bc6bdf4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -411,7 +411,7 @@ dependencies = [
 
 [[package]]
 name = "usdpl-back"
-version = "0.1.0"
+version = "0.2.1"
 dependencies = [
  "tungstenite",
  "usdpl-core",
diff --git a/usdpl-back/Cargo.toml b/usdpl-back/Cargo.toml
index 9080157..4f077f7 100644
--- a/usdpl-back/Cargo.toml
+++ b/usdpl-back/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "usdpl-back"
-version = "0.2.0"
+version = "0.2.1"
 edition = "2021"
 license = "GPL-3.0-only"
 repository = "https://github.com/NGnius/usdpl-rs"
diff --git a/usdpl-back/src/errors.rs b/usdpl-back/src/errors.rs
index 96fbded..38906fd 100644
--- a/usdpl-back/src/errors.rs
+++ b/usdpl-back/src/errors.rs
@@ -1,6 +1,16 @@
+#[derive(Debug)]
 pub enum ServerError {
     Tungstenite(tungstenite::error::Error),
     Io(std::io::Error),
 }
 
+impl std::fmt::Display for ServerError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::Tungstenite(t) => (&t as &dyn std::fmt::Display).fmt(f),
+            Self::Io(io) => (&io as &dyn std::fmt::Display).fmt(f),
+        }
+    }
+}
+
 pub type ServerResult = Result<(), ServerError>;