diff --git a/app/api/langchain/tool/agent/edge/route.ts b/app/api/langchain/tool/agent/edge/route.ts
index 421ed7bc9..8d1be7026 100644
--- a/app/api/langchain/tool/agent/edge/route.ts
+++ b/app/api/langchain/tool/agent/edge/route.ts
@@ -79,3 +79,22 @@ export const GET = handle;
 export const POST = handle;
 
 export const runtime = "edge";
+export const preferredRegion = [
+  "arn1",
+  "bom1",
+  "cdg1",
+  "cle1",
+  "cpt1",
+  "dub1",
+  "fra1",
+  "gru1",
+  "hnd1",
+  "iad1",
+  "icn1",
+  "kix1",
+  "lhr1",
+  "pdx1",
+  "sfo1",
+  "sin1",
+  "syd1",
+];
\ No newline at end of file
diff --git a/app/api/langchain/tool/agent/nodejs/route.ts b/app/api/langchain/tool/agent/nodejs/route.ts
index 85be0d930..fa516d5a5 100644
--- a/app/api/langchain/tool/agent/nodejs/route.ts
+++ b/app/api/langchain/tool/agent/nodejs/route.ts
@@ -99,3 +99,22 @@ export const GET = handle;
 export const POST = handle;
 
 export const runtime = "nodejs";
+export const preferredRegion = [
+  "arn1",
+  "bom1",
+  "cdg1",
+  "cle1",
+  "cpt1",
+  "dub1",
+  "fra1",
+  "gru1",
+  "hnd1",
+  "iad1",
+  "icn1",
+  "kix1",
+  "lhr1",
+  "pdx1",
+  "sfo1",
+  "sin1",
+  "syd1",
+];
\ No newline at end of file