diff --git a/platformio.ini b/platformio.ini
index 53173ad..c9515ae 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -37,7 +37,7 @@ platform = https://github.com/pioarduino/platform-espressif32/releases/download/
 ; board = esp32-c6-devkitc-1
 
 [env:arduino-310rc1]
-platform = https://github.com/pioarduino/platform-espressif32/releases/download/53.03.10%%2Brc1/platform-espressif32.zip
+platform = https://github.com/pioarduino/platform-espressif32/releases/download/53.03.10-rc1/platform-espressif32.zip
 ; board = esp32-s3-devkitc-1
 ; board = esp32-c6-devkitc-1
 
@@ -73,7 +73,7 @@ platform = https://github.com/pioarduino/platform-espressif32/releases/download/
 board = ${sysenv.PIO_BOARD}
 
 [env:ci-arduino-310rc1]
-platform = https://github.com/pioarduino/platform-espressif32/releases/download/53.03.10%%2Brc1/platform-espressif32.zip
+platform = https://github.com/pioarduino/platform-espressif32/releases/download/53.03.10-rc1/platform-espressif32.zip
 board = ${sysenv.PIO_BOARD}
 
 [env:ci-esp8266]