diff --git a/backend/package.json b/backend/package.json
index 8bd331f..7bf2984 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.19.21",
+  "version": "2.19.22",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and Shadowrocket.",
   "main": "src/main.js",
   "scripts": {
diff --git a/backend/src/core/proxy-utils/parsers/peggy/qx.js b/backend/src/core/proxy-utils/parsers/peggy/qx.js
index 7036705..2a0f229 100644
--- a/backend/src/core/proxy-utils/parsers/peggy/qx.js
+++ b/backend/src/core/proxy-utils/parsers/peggy/qx.js
@@ -157,7 +157,7 @@ aead = comma "aead" equals flag:bool { proxy.aead = flag; }
 
 udp_relay = comma "udp-relay" equals flag:bool { proxy.udp = flag; }
 udp_over_tcp = comma "udp-over-tcp" equals flag:bool { throw new Error("UDP over TCP is not supported"); }
-udp_over_tcp_new = comma "udp-over-tcp" equals param:$[^=,]+ { if (param === "sp.v1") { proxy["udp-over-tcp"] = true; proxy["udp-over-tcp-version"] = 1; } else if (param === "true") { proxy["_ssr_python_uot"] = true; } else { throw new Error("Invalid value for udp-over-tcp"); } }
+udp_over_tcp_new = comma "udp-over-tcp" equals param:$[^=,]+ { if (param === "sp.v1") { proxy["udp-over-tcp"] = true; proxy["udp-over-tcp-version"] = 1; } else if (param === "sp.v2") { proxy["udp-over-tcp"] = true; proxy["udp-over-tcp-version"] = 2; } else if (param === "true") { proxy["_ssr_python_uot"] = true; } else { throw new Error("Invalid value for udp-over-tcp"); } }
 
 fast_open = comma "fast-open" equals flag:bool { proxy.tfo = flag; }
 
diff --git a/backend/src/core/proxy-utils/parsers/peggy/qx.peg b/backend/src/core/proxy-utils/parsers/peggy/qx.peg
index 6c7fc24..00a84cd 100644
--- a/backend/src/core/proxy-utils/parsers/peggy/qx.peg
+++ b/backend/src/core/proxy-utils/parsers/peggy/qx.peg
@@ -155,7 +155,7 @@ aead = comma "aead" equals flag:bool { proxy.aead = flag; }
 
 udp_relay = comma "udp-relay" equals flag:bool { proxy.udp = flag; }
 udp_over_tcp = comma "udp-over-tcp" equals flag:bool { throw new Error("UDP over TCP is not supported"); }
-udp_over_tcp_new = comma "udp-over-tcp" equals param:$[^=,]+ { if (param === "sp.v1") { proxy["udp-over-tcp"] = true; proxy["udp-over-tcp-version"] = 1; } else if (param === "true") { proxy["_ssr_python_uot"] = true; } else { throw new Error("Invalid value for udp-over-tcp"); } }
+udp_over_tcp_new = comma "udp-over-tcp" equals param:$[^=,]+ { if (param === "sp.v1") { proxy["udp-over-tcp"] = true; proxy["udp-over-tcp-version"] = 1; } else if (param === "sp.v2") { proxy["udp-over-tcp"] = true; proxy["udp-over-tcp-version"] = 2; } else if (param === "true") { proxy["_ssr_python_uot"] = true; } else { throw new Error("Invalid value for udp-over-tcp"); } }
 
 fast_open = comma "fast-open" equals flag:bool { proxy.tfo = flag; }
 
diff --git a/backend/src/core/proxy-utils/producers/qx.js b/backend/src/core/proxy-utils/producers/qx.js
index 8068574..1e90f0c 100644
--- a/backend/src/core/proxy-utils/producers/qx.js
+++ b/backend/src/core/proxy-utils/producers/qx.js
@@ -134,11 +134,15 @@ function shadowsocks(proxy, includeUnsupportedProxy) {
     // udp over tcp
     if (proxy['_ssr_python_uot']) {
         append(`,udp-over-tcp=true`);
-    } else if (
-        proxy['udp-over-tcp'] &&
-        (!proxy['udp-over-tcp-version'] || proxy['udp-over-tcp-version'] === 1)
-    ) {
-        append(`,udp-over-tcp=sp.v1`);
+    } else if (proxy['udp-over-tcp']) {
+        if (
+            !proxy['udp-over-tcp-version'] ||
+            proxy['udp-over-tcp-version'] === 1
+        ) {
+            append(`,udp-over-tcp=sp.v1`);
+        } else if (proxy['udp-over-tcp-version'] === 2) {
+            append(`,udp-over-tcp=sp.v2`);
+        }
     }
 
     // server_check_url