diff --git a/src/socketio/asyncio_client.py b/src/socketio/asyncio_client.py
index 3c700ee..feb470b 100644
--- a/src/socketio/asyncio_client.py
+++ b/src/socketio/asyncio_client.py
@@ -196,7 +196,7 @@ class AsyncClient(client.Client):
                           argument is omitted the event is emitted to the
                           default namespace.
         :param callback: If given, this function will be called to acknowledge
-                         the the server has received the message. The arguments
+                         the server has received the message. The arguments
                          that will be passed to the function are those provided
                          by the server.
 
@@ -242,7 +242,7 @@ class AsyncClient(client.Client):
                           argument is omitted the event is emitted to the
                           default namespace.
         :param callback: If given, this function will be called to acknowledge
-                         the the server has received the message. The arguments
+                         the server has received the message. The arguments
                          that will be passed to the function are those provided
                          by the server.
 
diff --git a/src/socketio/asyncio_server.py b/src/socketio/asyncio_server.py
index e083a78..e5df2a9 100644
--- a/src/socketio/asyncio_server.py
+++ b/src/socketio/asyncio_server.py
@@ -141,7 +141,7 @@ class AsyncServer(server.Server):
                           argument is omitted the event is emitted to the
                           default namespace.
         :param callback: If given, this function will be called to acknowledge
-                         the the client has received the message. The arguments
+                         the client has received the message. The arguments
                          that will be passed to the function are those provided
                          by the client. Callback functions can only be used
                          when addressing an individual client.
@@ -194,7 +194,7 @@ class AsyncServer(server.Server):
                           argument is omitted the event is emitted to the
                           default namespace.
         :param callback: If given, this function will be called to acknowledge
-                         the the client has received the message. The arguments
+                         the client has received the message. The arguments
                          that will be passed to the function are those provided
                          by the client. Callback functions can only be used
                          when addressing an individual client.
diff --git a/src/socketio/client.py b/src/socketio/client.py
index 58d381b..2f8de8e 100644
--- a/src/socketio/client.py
+++ b/src/socketio/client.py
@@ -378,7 +378,7 @@ class Client(object):
                           argument is omitted the event is emitted to the
                           default namespace.
         :param callback: If given, this function will be called to acknowledge
-                         the the server has received the message. The arguments
+                         the server has received the message. The arguments
                          that will be passed to the function are those provided
                          by the server.
 
@@ -422,7 +422,7 @@ class Client(object):
                           argument is omitted the event is emitted to the
                           default namespace.
         :param callback: If given, this function will be called to acknowledge
-                         the the server has received the message. The arguments
+                         the server has received the message. The arguments
                          that will be passed to the function are those provided
                          by the server.
         """
diff --git a/src/socketio/server.py b/src/socketio/server.py
index efd8187..fc13f2a 100644
--- a/src/socketio/server.py
+++ b/src/socketio/server.py
@@ -294,7 +294,7 @@ class Server(object):
                           argument is omitted the event is emitted to the
                           default namespace.
         :param callback: If given, this function will be called to acknowledge
-                         the the client has received the message. The arguments
+                         the client has received the message. The arguments
                          that will be passed to the function are those provided
                          by the client. Callback functions can only be used
                          when addressing an individual client.
@@ -346,7 +346,7 @@ class Server(object):
                           argument is omitted the event is emitted to the
                           default namespace.
         :param callback: If given, this function will be called to acknowledge
-                         the the client has received the message. The arguments
+                         the client has received the message. The arguments
                          that will be passed to the function are those provided
                          by the client. Callback functions can only be used
                          when addressing an individual client.