diff --git a/MBCPApp/patches/fix_vtap_cert.sh b/MBCPApp/patches/fix_vtap_cert.sh
new file mode 100644
index 0000000..3a84876
--- /dev/null
+++ b/MBCPApp/patches/fix_vtap_cert.sh
@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+# PATCHNAME: Fix outdated VTAP certificate
+# MAXVER:
+# MINVER:
+# shellcheck disable=SC1091
+. "$DIRPATH"/common.sh
+
+info "Helpful for fixing outdated certificate from older app verison, like v6.4.73 or older"
+info "Allow logging in again in older app."
+info "Not needed for newer app version (like v6.4.94)"
+
+# What is [firmware] and [profile]?
+# It contains the firmware and certificate for VTAP to communicate with the app connection
+# Both [firmware] and [profile] is encrypted with base64 format.
+# We do not provide it in the project source, but you can get it from the app itself, in [assets] folder.
+
+nofwfound() {
+	err "no VTAP firmware in [fixcert] folder found!"
+	info "copy [firmware] and [profile] file to [fixcert] folder to continue."
+	info "[firmware] and [profile] can be found in [assets], please find from newer app."
+	info "recommended app : v6.4.94"
+
+	
+}
+
+mkdir -p "$DIRPATH"/fixcert/
+
+[ ! -f "$DIRPATH"/fixcert/firmware ] && nofwfound
+
+[ ! -f "$DIRPATH"/fixcert/profile ] && nofwfound
+
+# fw
+cp -f "$DIRPATH"/fixcert/firmware "$DIRPATH"/mbapk/mbapk_unpacked/root/assets/
+
+# profile
+cp -f "$DIRPATH"/fixcert/profile "$DIRPATH"/mbapk/mbapk_unpacked/root/assets/
+
+info "Remove [firmware] and [profile] file from [/data/data/com.mbmobile/files] or clear app data"
+info "If the app still keep crashing or throwing expired certificate screen."