diff --git a/tools/internal_ci/linux/grpc_interop_matrix.cfg b/tools/internal_ci/linux/grpc_interop_matrix.cfg
index a7fd479a734..71e930e0b00 100644
--- a/tools/internal_ci/linux/grpc_interop_matrix.cfg
+++ b/tools/internal_ci/linux/grpc_interop_matrix.cfg
@@ -17,7 +17,7 @@
 # Location of the continuous shell script in repository.
 build_file: "grpc/tools/internal_ci/linux/grpc_interop_matrix.sh"
 # grpc_interop tests can take 1 hours to complete.
-timeout_mins: 60
+timeout_mins: 120
 action {
   define_artifacts {
     regex: "**/sponge_log.xml"