--- a/taskcluster/ci/build/windows.yml
+++ b/taskcluster/ci/build/windows.yml
@@ -107,16 +107,16 @@ win64/pgo:
             gecko-v2: win64-pgo
     treeherder:
         platform: windows2012-64/pgo
         symbol: tc(B)
         tier: 2
     worker-type: aws-provisioner-v1/gecko-{level}-b-win2012
     worker:
         implementation: generic-worker
-        max-run-time: 9000
+        max-run-time: 10800
     run:
         using: mozharness
         options: [enable-pgo]
         script: mozharness/scripts/fx_desktop_build.py
         config:
             - builds/taskcluster_firefox_win64_opt.py