diff --git a/.woodpecker/build.yaml b/.woodpecker/build.yaml
index cae0790..6beb903 100644
--- a/.woodpecker/build.yaml
+++ b/.woodpecker/build.yaml
@@ -35,6 +35,10 @@ steps:
       # - curl -s https://raw.githubusercontent.com/Homebrew/homebrew-core/master/Formula/r/r.rb | grep -o 'R-[0-9]*\.[0-9]*\.[0-9]*' | tr -d 'R-' | tr -d '"' > r-release-version.txt
       - echo "4.3.3" > r-release-version.txt
       - cat r-release-version.txt
+    backend_options:
+      kubernetes:
+        nodeSelector:
+          topology.kubernetes.io/region: fsn1
 
   - name: Check if files for R version already exist in s3
     environment:
@@ -48,6 +52,10 @@ steps:
       - apk add -q --no-cache aws-cli
       - aws s3 ls s3://devxy-r-builds/${PLATFORM_ID}/ | tail -1 | awk '{print $NF}' | cut -c 3-7 > r_build_latest.txt
       - cat r_build_latest.txt
+    backend_options:
+      kubernetes:
+        nodeSelector:
+          topology.kubernetes.io/region: fsn1
 
   # ref: https://github.com/woodpecker-ci/woodpecker/discussions/2721
   - name: Build
@@ -67,6 +75,7 @@ steps:
       kubernetes:
         nodeSelector:
           kubernetes.io/arch: "arm64"
+          topology.kubernetes.io/region: fsn1
         tolerations:
           - key: "CI"
             operator: "Equal"
@@ -95,6 +104,10 @@ steps:
     volumes:
       - ci-tmp-fsn1:/tmp # agent on k8s
       # - /tmp:/tmp # agent on VM
+    backend_options:
+      kubernetes:
+        nodeSelector:
+          topology.kubernetes.io/region: fsn1
 
 services:
   docker:
@@ -107,3 +120,7 @@ services:
       - 2375
     volumes:
       - ci-tmp-fsn1:/tmp # agent on k8s
+    backend_options:
+      kubernetes:
+        nodeSelector:
+          topology.kubernetes.io/region: fsn1