diff --git a/examples/_thread/thread_issue1.py b/examples/_thread/thread_issue1.py
index 06f2d3b82..7d2edaaaa 100644
--- a/examples/_thread/thread_issue1.py
+++ b/examples/_thread/thread_issue1.py
@@ -5,10 +5,10 @@
 def task2():
     while True:
         print("123")
-        time.sleep_ms(2001)
+        time.sleep_ms(201)
 
 
 _thread.start_new_thread(task2, ())
 
 while True:
-    time.sleep_ms(2000)
+    time.sleep_ms(200)
diff --git a/package/_thread/_thread.c b/package/_thread/_thread.c
index 39f3d353a..15bbdc2b1 100644
--- a/package/_thread/_thread.c
+++ b/package/_thread/_thread.c
@@ -3,6 +3,10 @@
 #include "TinyObj.h"
 #include "dataMemory.h"
 
+#if !PIKASCRIPT_VERSION_REQUIRE_MINIMUN(1, 13, 4)
+#error "pikapython version must be greater than 1.13.4"
+#endif
+
 static volatile int g_thread_stack_size = PIKA_THREAD_STACK_SIZE;
 #if !PIKA_THREAD_MALLOC_STACK_ENABLE
 extern volatile PikaMemInfo g_PikaMemInfo;
@@ -43,6 +47,8 @@ typedef struct pika_thread_info {
 static void _thread_func(void* arg) {
     pika_debug("thread start");
     pika_GIL_ENTER();
+    PikaVMThread* vmThread = pikaVMThread_require();
+    vmThread->is_sub_thread = 1;
     PikaObj* ctx = New_TinyObj(NULL);
     pika_thread_info* info = (pika_thread_info*)arg;
     if (NULL != info->args) {
diff --git a/port/linux/package/pikascript/pikascript-lib/_thread/_thread.c b/port/linux/package/pikascript/pikascript-lib/_thread/_thread.c
index 46b3899fa..15bbdc2b1 100644
--- a/port/linux/package/pikascript/pikascript-lib/_thread/_thread.c
+++ b/port/linux/package/pikascript/pikascript-lib/_thread/_thread.c
@@ -3,6 +3,10 @@
 #include "TinyObj.h"
 #include "dataMemory.h"
 
+#if !PIKASCRIPT_VERSION_REQUIRE_MINIMUN(1, 13, 4)
+#error "pikapython version must be greater than 1.13.4"
+#endif
+
 static volatile int g_thread_stack_size = PIKA_THREAD_STACK_SIZE;
 #if !PIKA_THREAD_MALLOC_STACK_ENABLE
 extern volatile PikaMemInfo g_PikaMemInfo;
diff --git a/port/linux/version_config.py b/port/linux/version_config.py
index 91859921a..f65e45c45 100644
--- a/port/linux/version_config.py
+++ b/port/linux/version_config.py
@@ -1,3 +1,3 @@
 MajorVersion  =   "1"
 MinorVersion  =   "13"
-MicroVersion  =   "3"
+MicroVersion  =   "4"
diff --git a/src/PikaVersion.h b/src/PikaVersion.h
index 592329b55..11ea23958 100644
--- a/src/PikaVersion.h
+++ b/src/PikaVersion.h
@@ -1,5 +1,5 @@
 #define PIKA_VERSION_MAJOR 1
 #define PIKA_VERSION_MINOR 13
-#define PIKA_VERSION_MICRO 3
+#define PIKA_VERSION_MICRO 4
 
-#define PIKA_EDIT_TIME "2024/08/09 03:28:08"
+#define PIKA_EDIT_TIME "2024/08/09 03:29:21"