diff --git a/esphome/components/esphome/ota/ota_esphome.cpp b/esphome/components/esphome/ota/ota_esphome.cpp
index 1d0b8713a48..245bdc9a096 100644
--- a/esphome/components/esphome/ota/ota_esphome.cpp
+++ b/esphome/components/esphome/ota/ota_esphome.cpp
@@ -109,8 +109,8 @@ void ESPHomeOTAComponent::dump_config() {
                 this->running_app_size_);
 #ifdef USE_ESP32
   ESP_LOGCONFIG(TAG, "  Partition table:");
-  esp_partition_iterator_t it = esp_partition_find(ESP_PARTITION_TYPE_ANY, ESP_PARTITION_SUBTYPE_ANY, NULL);
-  while (it != NULL) {
+  esp_partition_iterator_t it = esp_partition_find(ESP_PARTITION_TYPE_ANY, ESP_PARTITION_SUBTYPE_ANY, nullptr);
+  while (it != nullptr) {
     const esp_partition_t *p = esp_partition_get(it);
     ESP_LOGCONFIG(TAG, "    %s: type=0x%X, subtype=0x%X, address=0x%X, size=0x%X", p->label, p->type, p->subtype,
                   p->address, p->size);
diff --git a/esphome/components/ota/ota_backend_esp_idf.cpp b/esphome/components/ota/ota_backend_esp_idf.cpp
index 2a08bece9a6..bfd469bd732 100644
--- a/esphome/components/ota/ota_backend_esp_idf.cpp
+++ b/esphome/components/ota/ota_backend_esp_idf.cpp
@@ -203,7 +203,7 @@ OTAResponseTypes IDFOTABackend::update_partition_table() {
   }
 
   // Verify existing partition table
-  const esp_partition_info_t *existing_partition_table = NULL;
+  const esp_partition_info_t *existing_partition_table = nullptr;
   esp_partition_mmap_handle_t partition_table_map;
   err = esp_partition_mmap(this->partition_table_part_, 0, ESP_PARTITION_TABLE_MAX_LEN, ESP_PARTITION_MMAP_DATA,
                            (const void **) &existing_partition_table, &partition_table_map);