diff --git a/scripts/cross-build.sh b/scripts/cross-build.sh
index e043bfd9..e87aa572 100755
--- a/scripts/cross-build.sh
+++ b/scripts/cross-build.sh
@@ -11,8 +11,8 @@ BUILD_ROOT="${BUILD_ROOT:-/opt/build}"
 BUILD_TARGET="${BUILD_TARGET:-x86_64}"
 
 ZLIB_VERSION="${ZLIB_VERSION:-1.3}"
-JSON_C_VERSION="${JSON_C_VERSION:-0.16}"
-MBEDTLS_VERSION="${MBEDTLS_VERSION:-2.28.1}"
+JSON_C_VERSION="${JSON_C_VERSION:-0.17}"
+MBEDTLS_VERSION="${MBEDTLS_VERSION:-2.28.5}"
 LIBUV_VERSION="${LIBUV_VERSION:-1.44.2}"
 LIBWEBSOCKETS_VERSION="${LIBWEBSOCKETS_VERSION:-4.3.2}"