diff --git a/include/zh_avr_pcf8574.h b/include/zh_avr_pcf8574.h
index b8f7bfe..beab623 100644
--- a/include/zh_avr_pcf8574.h
+++ b/include/zh_avr_pcf8574.h
@@ -133,7 +133,7 @@ extern "C"
     /**
      * @brief PCF8574 ISR handler.
      */
-    void zh_avr_pcf8574_isr_handler(void);
+    BaseType_t zh_avr_pcf8574_isr_handler(void);
 
 #ifdef __cplusplus
 }
diff --git a/version.txt b/version.txt
index afaf360..1cc5f65 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.0.0
\ No newline at end of file
+1.1.0
\ No newline at end of file
diff --git a/zh_avr_pcf8574.c b/zh_avr_pcf8574.c
index 408e409..8b9e830 100644
--- a/zh_avr_pcf8574.c
+++ b/zh_avr_pcf8574.c
@@ -129,17 +129,14 @@ static avr_err_t _zh_avr_pcf8574_configure_interrupts(const zh_avr_pcf8574_init_
     return AVR_OK;
 }
 
-void zh_avr_pcf8574_isr_handler(void)
+BaseType_t zh_avr_pcf8574_isr_handler(void)
 {
+    BaseType_t xHigherPriorityTaskWoken = pdFALSE;
     if ((PIND & (1 << _interrupt_gpio)) == 0)
     {
-        BaseType_t xHigherPriorityTaskWoken = pdFALSE;
         xSemaphoreGiveFromISR(_interrupt_semaphore, &xHigherPriorityTaskWoken);
-        if (xHigherPriorityTaskWoken == pdTRUE)
-        {
-            portYIELD();
-        };
     }
+    return xHigherPriorityTaskWoken;
 }
 
 static void _zh_avr_pcf8574_isr_processing_task(void *pvParameter)