diff --git a/utils.sh b/utils.sh
index d924a0d..e75a4df 100644
--- a/utils.sh
+++ b/utils.sh
@@ -639,7 +639,7 @@
 
 linaro_2001_release="${linaro_2001_release:-$tfa_downloads/linaro/20.01}"
 linaro_release="${linaro_release:-$linaro_2001_release}"
-mbedtls_version="${mbedtls_version:-3.3.0}"
+mbedtls_version="${mbedtls_version:-3.4.0}"
 
 # mbedTLS archive public hosting available at github.com
 mbedtls_archive="${mbedtls_archive:-https://github.com/Mbed-TLS/mbedtls/archive/mbedtls-${mbedtls_version}.tar.gz}"