diff --git a/src/server_manager/install_scripts/install_server.sh b/src/server_manager/install_scripts/install_server.sh
index a2c6fbc2..1ef53611 100755
--- a/src/server_manager/install_scripts/install_server.sh
+++ b/src/server_manager/install_scripts/install_server.sh
@@ -263,7 +263,7 @@ function generate_certificate() {
   readonly SB_CERTIFICATE_FILE="${CERTIFICATE_NAME}.crt"
   readonly SB_PRIVATE_KEY_FILE="${CERTIFICATE_NAME}.key"
   declare -a openssl_req_flags=(
-    -x509 -nodes -days 36500 -newkey rsa:2048
+    -x509 -nodes -days 36500 -newkey rsa:4096
     -subj "/CN=${PUBLIC_HOSTNAME}"
     -keyout "${SB_PRIVATE_KEY_FILE}" -out "${SB_CERTIFICATE_FILE}"
   )