diff --git a/libs/libm/newlib/Make.defs b/libs/libm/newlib/Make.defs
index 24474ac2df..8423d3134a 100644
--- a/libs/libm/newlib/Make.defs
+++ b/libs/libm/newlib/Make.defs
@@ -26,7 +26,7 @@ ifeq ($(CONFIG_ARCH_CHIP_ESP32),y)
 else
   NEWLIB_VERSION=4.3.0.20230120
   NEWLIB_BASENAME=newlib
-  NEWLIB_URL_BASE=ftp://sourceware.org/pub/newlib
+  NEWLIB_URL_BASE=https://sourceware.org/pub/newlib
   NEWLIB_TARBALL=$(NEWLIB_BASENAME)-$(NEWLIB_VERSION).tar.gz
 endif