diff --git a/src/bpm/runc/specbuilder/specbuilder.go b/src/bpm/runc/specbuilder/specbuilder.go
index b45dad41..42d195cc 100644
--- a/src/bpm/runc/specbuilder/specbuilder.go
+++ b/src/bpm/runc/specbuilder/specbuilder.go
@@ -61,7 +61,7 @@ func DefaultSpec() *specs.Spec {
 				Destination: "/dev",
 				Type:        "tmpfs",
 				Source:      "tmpfs",
-				Options:     []string{"nosuid", "noexec", "mode=755", "size=65536k"},
+				Options:     []string{"nosuid", "noexec", "mode=755"},
 			},
 			{
 				Destination: "/dev/pts",
@@ -73,7 +73,7 @@ func DefaultSpec() *specs.Spec {
 				Destination: "/dev/shm",
 				Type:        "tmpfs",
 				Source:      "shm",
-				Options:     []string{"nosuid", "noexec", "nodev", "mode=1777", "size=65536k"},
+				Options:     []string{"nosuid", "noexec", "nodev", "mode=1777"},
 			},
 			{
 				Destination: "/dev/mqueue",