diff --git a/cores/esp32/Esp.cpp b/cores/esp32/Esp.cpp
index ecbf4877d90..925a67dfbad 100644
--- a/cores/esp32/Esp.cpp
+++ b/cores/esp32/Esp.cpp
@@ -248,6 +248,10 @@ String EspClass::getSketchMD5()
         md5.add(pb, readBytes);
         lengthLeft -= readBytes;
         offset += readBytes;
+
+        #if CONFIG_FREERTOS_UNICORE
+        delay(1);  // Fix solo WDT
+        #endif
     }
     free(pb);
     md5.calculate();
diff --git a/libraries/Update/src/Updater.cpp b/libraries/Update/src/Updater.cpp
index b519b76c380..9980558dbba 100644
--- a/libraries/Update/src/Updater.cpp
+++ b/libraries/Update/src/Updater.cpp
@@ -393,6 +393,10 @@ size_t UpdateClass::writeStream(Stream &data) {
         if((_bufferLen == remaining() || _bufferLen == SPI_FLASH_SEC_SIZE) && !_writeBuffer())
             return written;
         written += toRead;
+
+        #if CONFIG_FREERTOS_UNICORE
+        delay(1);  // Fix solo WDT
+        #endif
     }
     return written;
 }