diff --git a/platformio/__init__.py b/platformio/__init__.py
index 85dac650..e0d545ec 100644
--- a/platformio/__init__.py
+++ b/platformio/__init__.py
@@ -14,7 +14,7 @@
 
 import sys
 
-VERSION = (2, 7, "0.dev13")
+VERSION = (2, 7, "0.dev14")
 __version__ = ".".join([str(s) for s in VERSION])
 
 __title__ = "platformio"
diff --git a/platformio/builder/scripts/espressif.py b/platformio/builder/scripts/espressif.py
index 3c0c5aa4..6e49bea7 100644
--- a/platformio/builder/scripts/espressif.py
+++ b/platformio/builder/scripts/espressif.py
@@ -115,7 +115,7 @@ env.Replace(
     UPLOADEROTAFLAGS=[
         "--debug",
         "--progress",
-        "-i", "$UPLOAD_PORT",
+        "-i", '"$UPLOAD_PORT"',
         "$UPLOAD_FLAGS"
     ],