diff --git a/build-libstdc++ b/build-libstdc++
index 7fccbb1..db83d69 100755
--- a/build-libstdc++
+++ b/build-libstdc++
@@ -2,7 +2,7 @@
 set -e
 
 GCC_VERSION=gcc-12.2.0
-NEWLIB_VERSION=newlib-3.3.0
+NEWLIB_VERSION=newlib-4.2.0.20211231
 NEWLIB_INCLUDES=$PWD/build/$NEWLIB_VERSION/newlib/libc/include
 JOBS=$(nproc --all)
 OUT_DIR_NOPIC=$PWD/no-pic
diff --git a/build-newlib b/build-newlib
index 6403151..cd95cc2 100755
--- a/build-newlib
+++ b/build-newlib
@@ -1,7 +1,7 @@
 #!/bin/bash
 set -e
 
-NEWLIB_VERSION=newlib-3.3.0
+NEWLIB_VERSION=newlib-4.2.0.20211231
 JOBS=$(nproc --all)
 OUT_DIR_NOPIC=$PWD/no-pic
 OUT_DIR_PIC=$PWD/pic