diff --git a/docker/Dockerfile b/docker/Dockerfile
index 62a64c851d..25f2cf85d2 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -27,7 +27,7 @@ RUN \
         python3-cryptography=3.3.2-1 \
         iputils-ping=3:20210202-1 \
         git=1:2.30.2-1 \
-        curl=7.74.0-1.3+b1 \
+        curl=7.74.0-1.3+deb11u1 \
     && rm -rf \
         /tmp/* \
         /var/{cache,log}/* \
@@ -64,7 +64,7 @@ RUN \
 
 # Copy esphome and install
 COPY . /esphome
-RUN pip3 install --no-cache-dir -e /esphome
+RUN pip3 install --no-cache-dir /esphome
 
 # Settings for dashboard
 ENV USERNAME="" PASSWORD=""
@@ -112,7 +112,7 @@ RUN \
 
 # Copy esphome and install
 COPY . /esphome
-RUN pip3 install --no-cache-dir -e /esphome
+RUN pip3 install --no-cache-dir /esphome
 
 # Labels
 LABEL \
diff --git a/esphome/components/dht/sensor.py b/esphome/components/dht/sensor.py
index 1334f0270c..cd1886728e 100644
--- a/esphome/components/dht/sensor.py
+++ b/esphome/components/dht/sensor.py
@@ -33,7 +33,7 @@ DHT = dht_ns.class_("DHT", cg.PollingComponent)
 CONFIG_SCHEMA = cv.Schema(
     {
         cv.GenerateID(): cv.declare_id(DHT),
-        cv.Required(CONF_PIN): pins.gpio_input_pin_schema,
+        cv.Required(CONF_PIN): pins.internal_gpio_input_pin_schema,
         cv.Optional(CONF_TEMPERATURE): sensor.sensor_schema(
             unit_of_measurement=UNIT_CELSIUS,
             accuracy_decimals=1,
diff --git a/esphome/components/web_server/__init__.py b/esphome/components/web_server/__init__.py
index d9ff84d501..62d5ec6f14 100644
--- a/esphome/components/web_server/__init__.py
+++ b/esphome/components/web_server/__init__.py
@@ -22,31 +22,38 @@ AUTO_LOAD = ["json", "web_server_base"]
 web_server_ns = cg.esphome_ns.namespace("web_server")
 WebServer = web_server_ns.class_("WebServer", cg.Component, cg.Controller)
 
-CONFIG_SCHEMA = cv.Schema(
-    {
-        cv.GenerateID(): cv.declare_id(WebServer),
-        cv.Optional(CONF_PORT, default=80): cv.port,
-        cv.Optional(
-            CONF_CSS_URL, default="https://esphome.io/_static/webserver-v1.min.css"
-        ): cv.string,
-        cv.Optional(CONF_CSS_INCLUDE): cv.file_,
-        cv.Optional(
-            CONF_JS_URL, default="https://esphome.io/_static/webserver-v1.min.js"
-        ): cv.string,
-        cv.Optional(CONF_JS_INCLUDE): cv.file_,
-        cv.Optional(CONF_AUTH): cv.Schema(
-            {
-                cv.Required(CONF_USERNAME): cv.All(cv.string_strict, cv.Length(min=1)),
-                cv.Required(CONF_PASSWORD): cv.All(cv.string_strict, cv.Length(min=1)),
-            }
-        ),
-        cv.GenerateID(CONF_WEB_SERVER_BASE_ID): cv.use_id(
-            web_server_base.WebServerBase
-        ),
-        cv.Optional(CONF_INCLUDE_INTERNAL, default=False): cv.boolean,
-        cv.Optional(CONF_OTA, default=True): cv.boolean,
-    }
-).extend(cv.COMPONENT_SCHEMA)
+CONFIG_SCHEMA = cv.All(
+    cv.Schema(
+        {
+            cv.GenerateID(): cv.declare_id(WebServer),
+            cv.Optional(CONF_PORT, default=80): cv.port,
+            cv.Optional(
+                CONF_CSS_URL, default="https://esphome.io/_static/webserver-v1.min.css"
+            ): cv.string,
+            cv.Optional(CONF_CSS_INCLUDE): cv.file_,
+            cv.Optional(
+                CONF_JS_URL, default="https://esphome.io/_static/webserver-v1.min.js"
+            ): cv.string,
+            cv.Optional(CONF_JS_INCLUDE): cv.file_,
+            cv.Optional(CONF_AUTH): cv.Schema(
+                {
+                    cv.Required(CONF_USERNAME): cv.All(
+                        cv.string_strict, cv.Length(min=1)
+                    ),
+                    cv.Required(CONF_PASSWORD): cv.All(
+                        cv.string_strict, cv.Length(min=1)
+                    ),
+                }
+            ),
+            cv.GenerateID(CONF_WEB_SERVER_BASE_ID): cv.use_id(
+                web_server_base.WebServerBase
+            ),
+            cv.Optional(CONF_INCLUDE_INTERNAL, default=False): cv.boolean,
+            cv.Optional(CONF_OTA, default=True): cv.boolean,
+        },
+    ).extend(cv.COMPONENT_SCHEMA),
+    cv.only_with_arduino,
+)
 
 
 @coroutine_with_priority(40.0)
diff --git a/esphome/const.py b/esphome/const.py
index 614288ba51..9ed0975cd4 100644
--- a/esphome/const.py
+++ b/esphome/const.py
@@ -1,6 +1,6 @@
 """Constants used by esphome."""
 
-__version__ = "2021.12.2"
+__version__ = "2021.12.3"
 
 ALLOWED_NAME_CHARS = "abcdefghijklmnopqrstuvwxyz0123456789-_"