diff --git a/esphome/components/web_server/__init__.py b/esphome/components/web_server/__init__.py
index bbd5bc662e..fa614fb5a6 100644
--- a/esphome/components/web_server/__init__.py
+++ b/esphome/components/web_server/__init__.py
@@ -35,19 +35,19 @@ WebServer = web_server_ns.class_("WebServer", cg.Component, cg.Controller)
 def default_url(config):
     config = config.copy()
     if config[CONF_VERSION] == 1:
-        if not (CONF_CSS_URL in config):
+        if CONF_CSS_URL not in config:
             config[CONF_CSS_URL] = "https://esphome.io/_static/webserver-v1.min.css"
-        if not (CONF_JS_URL in config):
+        if CONF_JS_URL not in config:
             config[CONF_JS_URL] = "https://esphome.io/_static/webserver-v1.min.js"
     if config[CONF_VERSION] == 2:
-        if not (CONF_CSS_URL in config):
+        if CONF_CSS_URL not in config:
             config[CONF_CSS_URL] = ""
-        if not (CONF_JS_URL in config):
+        if CONF_JS_URL not in config:
             config[CONF_JS_URL] = "https://oi.esphome.io/v2/www.js"
     if config[CONF_VERSION] == 3:
-        if not (CONF_CSS_URL in config):
+        if CONF_CSS_URL not in config:
             config[CONF_CSS_URL] = ""
-        if not (CONF_JS_URL in config):
+        if CONF_JS_URL not in config:
             config[CONF_JS_URL] = "https://oi.esphome.io/v3/www.js"
     return config