diff --git a/platformio.ini b/platformio.ini
index a17ca1b..f7bdbe2 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -21,7 +21,7 @@ platform = espressif32@6.8.1
 platform = https://github.com/pioarduino/platform-espressif32/releases/download/51.03.04/platform-espressif32.zip
 
 [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
 
 ;  CI
 
@@ -34,5 +34,5 @@ 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}