diff --git a/README.md b/README.md
index ecf0c11..3f2de49 100644
--- a/README.md
+++ b/README.md
@@ -327,3 +327,4 @@ Thanks for everyone who reported a bug, suggested a feature and contributed to t
 - **10/05/21 (v0.5.1)** - Fingerprints and Certificates in the examples were updated by [@Khoi Hoang
 ](https://github.com/khoih-prog). Thank you Khoi!
 - **29/07/21 (v0.5.2)** - Merged PR by [ONLYstcm](https://github.com/ONLYstcm) which added a (configurable) timeout for connections. Thank you ONLYstcm.
+- **29/07/21 (v0.5.3)** - Deleted unsafe copy and assignment operators in `WebsocketsClient`.
\ No newline at end of file
diff --git a/library.properties b/library.properties
index b37b6d7..34fcc91 100644
--- a/library.properties
+++ b/library.properties
@@ -1,5 +1,5 @@
 name=ArduinoWebsockets
-version=0.5.2
+version=0.5.3
 author=Gil Maimon <mail.gilmaimon@gmail.com>
 maintainer=Gil Maimon <mail.gilmaimon@gmail.com>
 sentence=A library for writing modern Websockets applications with Arduino.
diff --git a/src/tiny_websockets/client.hpp b/src/tiny_websockets/client.hpp
index f3c035c..491a526 100644
--- a/src/tiny_websockets/client.hpp
+++ b/src/tiny_websockets/client.hpp
@@ -28,11 +28,10 @@ namespace websockets {
     WebsocketsClient();
     WebsocketsClient(std::shared_ptr<network::TcpClient> client);
     
-    WebsocketsClient(const WebsocketsClient& other);
-    WebsocketsClient(const WebsocketsClient&& other);
-    
-    WebsocketsClient& operator=(const WebsocketsClient& other);
-    WebsocketsClient& operator=(const WebsocketsClient&& other);
+    WebsocketsClient(const WebsocketsClient& other) = delete;
+    WebsocketsClient(const WebsocketsClient&& other) = delete;
+    WebsocketsClient& operator=(const WebsocketsClient& other) = delete;
+    WebsocketsClient& operator=(const WebsocketsClient&& other) = delete;
 
     void addHeader(const WSInterfaceString key, const WSInterfaceString value);
 
diff --git a/src/websockets_client.cpp b/src/websockets_client.cpp
index 49bfcb5..4c2212a 100644
--- a/src/websockets_client.cpp
+++ b/src/websockets_client.cpp
@@ -19,66 +19,6 @@ namespace websockets {
         // Empty
     }
 
-    WebsocketsClient::WebsocketsClient(const WebsocketsClient& other) :
-        _client(other._client),
-        _endpoint(other._endpoint),
-        _connectionOpen(other._client->available()),
-        _messagesCallback(other._messagesCallback),
-        _eventsCallback(other._eventsCallback),
-        _sendMode(other._sendMode) {
-
-        // delete other's client
-        const_cast<WebsocketsClient&>(other)._client = nullptr;
-        const_cast<WebsocketsClient&>(other)._connectionOpen = false;
-    }
-
-    WebsocketsClient::WebsocketsClient(const WebsocketsClient&& other) :
-        _client(other._client),
-        _endpoint(other._endpoint),
-        _connectionOpen(other._client->available()),
-        _messagesCallback(other._messagesCallback),
-        _eventsCallback(other._eventsCallback),
-        _sendMode(other._sendMode) {
-
-        // delete other's client
-        const_cast<WebsocketsClient&>(other)._client = nullptr;
-        const_cast<WebsocketsClient&>(other)._connectionOpen = false;
-    }
-
-    WebsocketsClient& WebsocketsClient::operator=(const WebsocketsClient& other) {
-        // call endpoint's copy operator
-        _endpoint = other._endpoint;
-
-        // get callbacks and data from other
-        this->_client = other._client;
-        this->_messagesCallback = other._messagesCallback;
-        this->_eventsCallback = other._eventsCallback;
-        this->_connectionOpen = other._connectionOpen;
-        this->_sendMode = other._sendMode;
-
-        // delete other's client
-        const_cast<WebsocketsClient&>(other)._client = nullptr;
-        const_cast<WebsocketsClient&>(other)._connectionOpen = false;
-        return *this;
-    }
-
-    WebsocketsClient& WebsocketsClient::operator=(const WebsocketsClient&& other) {
-        // call endpoint's copy operator
-        _endpoint = other._endpoint;
-
-        // get callbacks and data from other
-        this->_client = other._client;
-        this->_messagesCallback = other._messagesCallback;
-        this->_eventsCallback = other._eventsCallback;
-        this->_connectionOpen = other._connectionOpen;
-        this->_sendMode = other._sendMode;
-
-        // delete other's client
-        const_cast<WebsocketsClient&>(other)._client = nullptr;
-        const_cast<WebsocketsClient&>(other)._connectionOpen = false;
-        return *this;
-    }
-
     struct HandshakeRequestResult {
         WSString requestStr;
         WSString expectedAcceptKey;