diff --git a/tools/internal_ci/linux/grpc_master.cfg b/tools/internal_ci/linux/grpc_master.cfg
index 8ce2ef11a205e26484df18e64f3d4621e6609b3f..d5901bb60100fec7f980e8ba1b7582d5fc4722a9 100644
--- a/tools/internal_ci/linux/grpc_master.cfg
+++ b/tools/internal_ci/linux/grpc_master.cfg
@@ -32,7 +32,7 @@
 
 # Location of the continuous shell script in repository.
 build_file: "grpc/tools/internal_ci/linux/grpc_master.sh"
-timeout_mins: 60
+timeout_mins: 240
 action {
   define_artifacts {
     regex: "**/sponge_log.xml"