diff --git a/esphome/components/esp8266/gpio.py b/esphome/components/esp8266/gpio.py
index 2e8d6496bce..43508afaf92 100644
--- a/esphome/components/esp8266/gpio.py
+++ b/esphome/components/esp8266/gpio.py
@@ -202,11 +202,11 @@ async def add_pin_initial_states_array():
 
     cg.add_global(
         cg.RawExpression(
-            f"const uint8_t ESPHOME_ESP8266_GPIO_INITIAL_MODE[16] PROGMEM = {{{initial_modes_s}}}"
+            f"constexpr uint8_t ESPHOME_ESP8266_GPIO_INITIAL_MODE[16] PROGMEM = {{{initial_modes_s}}}"
         )
     )
     cg.add_global(
         cg.RawExpression(
-            f"const uint8_t ESPHOME_ESP8266_GPIO_INITIAL_LEVEL[16] PROGMEM = {{{initial_levels_s}}}"
+            f"constexpr uint8_t ESPHOME_ESP8266_GPIO_INITIAL_LEVEL[16] PROGMEM = {{{initial_levels_s}}}"
         )
     )
diff --git a/esphome/components/web_server/__init__.py b/esphome/components/web_server/__init__.py
index 294a5e0a152..9305a2de613 100644
--- a/esphome/components/web_server/__init__.py
+++ b/esphome/components/web_server/__init__.py
@@ -280,10 +280,8 @@ def add_resource_as_progmem(
         content_encoded = gzip.compress(content_encoded)
     content_encoded_size = len(content_encoded)
     bytes_as_int = ", ".join(str(x) for x in content_encoded)
-    uint8_t = f"const uint8_t ESPHOME_WEBSERVER_{resource_name}[{content_encoded_size}] PROGMEM = {{{bytes_as_int}}}"
-    size_t = (
-        f"const size_t ESPHOME_WEBSERVER_{resource_name}_SIZE = {content_encoded_size}"
-    )
+    uint8_t = f"constexpr uint8_t ESPHOME_WEBSERVER_{resource_name}[{content_encoded_size}] PROGMEM = {{{bytes_as_int}}}"
+    size_t = f"constexpr size_t ESPHOME_WEBSERVER_{resource_name}_SIZE = {content_encoded_size}"
     cg.add_global(cg.RawExpression(uint8_t))
     cg.add_global(cg.RawExpression(size_t))