diff --git a/sdkconfig.defaults b/sdkconfig.defaults
index 8346250..edc2f42 100644
--- a/sdkconfig.defaults
+++ b/sdkconfig.defaults
@@ -4,4 +4,8 @@ CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
 # Use custom partition table, 3MB application.
 CONFIG_PARTITION_TABLE_CUSTOM=y
 CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions.csv"
-CONFIG_PARTITION_TABLE_FILENAME="partitions.csv"
\ No newline at end of file
+CONFIG_PARTITION_TABLE_FILENAME="partitions.csv"
+
+# Custom CA bundle for mbedTLS
+CONFIG_MBEDTLS_CUSTOM_CERTIFICATE_BUNDLE=y
+CONFIG_MBEDTLS_CUSTOM_CERTIFICATE_BUNDLE_PATH="assets/ca"
\ No newline at end of file