diff --git a/version.txt b/version.txt
index 9183195..58073ef 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-2.4.0
\ No newline at end of file
+2.4.1
\ No newline at end of file
diff --git a/zh_pcf8574.c b/zh_pcf8574.c
index 086f933..10d2574 100755
--- a/zh_pcf8574.c
+++ b/zh_pcf8574.c
@@ -96,6 +96,10 @@ esp_err_t zh_pcf8574_deinit(zh_pcf8574_handle_t *handle)
             _interrupt_gpio = GPIO_NUM_MAX;
         }
     }
+    if (handle->system != NULL)
+    {
+        heap_caps_free(handle->system);
+    }
     i2c_master_bus_rm_device(handle->dev_handle);
     handle->is_initialized = false;
     for (uint8_t i = 0; i < sizeof(_i2c_matrix); ++i)