diff --git a/esphome/components/ld2415h/ld2415h.cpp b/esphome/components/ld2415h/ld2415h.cpp
index 4985432d9d..5b21b1d676 100644
--- a/esphome/components/ld2415h/ld2415h.cpp
+++ b/esphome/components/ld2415h/ld2415h.cpp
@@ -291,7 +291,7 @@ void LD2415HComponent::parse_firmware_() {
     ++fw;
 
     // Copy string into firmware
-    std::strcpy(this->firmware_, fw);
+    std::strncpy(this->firmware_, fw, sizeof(this->firmware_));
   } else {
     ESP_LOGE(TAG, "Firmware value invalid.");
   }