diff --git a/websockify/websocket.py b/websockify/websocket.py
index 889bc40..b3768ed 100644
--- a/websockify/websocket.py
+++ b/websockify/websocket.py
@@ -471,18 +471,18 @@ class WebSocketRequestHandler(SimpleHTTPRequestHandler):
             else: 
                 self.stype = "Plain non-SSL (ws://)"
 
-            self.log_message("%s: %s WebSocket connection" % (client_addr,
-                                                             self.stype))
-            self.log_message("%s: Version %s, base64: '%s'" % (client_addr,
-                                                       self.version, self.base64))
+            self.log_message("%s: %s WebSocket connection", client_addr,
+                             self.stype)
+            self.log_message("%s: Version %s, base64: '%s'", client_addr,
+                             self.version, self.base64)
             if self.path != '/':
-                self.log_message("%s: Path: '%s'" % (client_addr, self.path))
+                self.log_message("%s: Path: '%s'", client_addr, self.path)
 
             if self.record:
                 # Record raw frame data as JavaScript array
                 fname = "%s.%s" % (self.record,
                                    self.handler_id)
-                self.log_message("opening record file: %s" % fname)
+                self.log_message("opening record file: %s", fname)
                 self.rec = open(fname, 'w+')
                 encoding = "binary"
                 if self.base64: encoding = "base64"
diff --git a/websockify/websocketproxy.py b/websockify/websocketproxy.py
index f51cc7c..7b3ec11 100755
--- a/websockify/websocketproxy.py
+++ b/websockify/websocketproxy.py
@@ -74,8 +74,8 @@ Traffic Legend:
                 tsock.shutdown(socket.SHUT_RDWR)
                 tsock.close()
                 if self.verbose: 
-                    self.log_message("%s:%s: Closed target" %(
-                            self.server.target_host, self.server.target_port))
+                    self.log_message("%s:%s: Closed target",
+                            self.server.target_host, self.server.target_port)
             raise
 
     def get_target(self, target_cfg, path):
@@ -148,8 +148,8 @@ Traffic Legend:
                 if closed:
                     # TODO: What about blocking on client socket?
                     if self.verbose: 
-                        self.log_message("%s:%s: Client closed connection" %(
-                                self.server.target_host, self.server.target_port))
+                        self.log_message("%s:%s: Client closed connection",
+                                self.server.target_host, self.server.target_port)
                     raise self.CClose(closed['code'], closed['reason'])
 
 
@@ -170,8 +170,8 @@ Traffic Legend:
                 buf = target.recv(self.buffer_size)
                 if len(buf) == 0:
                     if self.verbose:
-                        self.log_message("%s:%s: Target closed connection" %(
-                                self.server.target_host, self.server.target_port))
+                        self.log_message("%s:%s: Target closed connection",
+                                self.server.target_host, self.server.target_port)
                     raise self.CClose(1000, "Target closed")
 
                 cqueue.append(buf)