diff --git a/core/config.h b/core/config.h
index 2c382d17..0d99d580 100644
--- a/core/config.h
+++ b/core/config.h
@@ -384,7 +384,7 @@
 #define APP_THREAD_STACK_SIZE_DEFAULT (64 * 1024)
 #define APP_THREAD_STACK_SIZE_MIN (48 * 1024)
 #else
-#define APP_THREAD_STACK_SIZE_DEFAULT (32 * 1024)
+#define APP_THREAD_STACK_SIZE_DEFAULT (64 * 1024)
 #define APP_THREAD_STACK_SIZE_MIN (24 * 1024)
 #endif
 #endif /* end of !(defined(APP_THREAD_STACK_SIZE_DEFAULT) \
diff --git a/core/iwasm/libraries/lib-socket/test/nslookup.c b/core/iwasm/libraries/lib-socket/test/nslookup.c
index 37150f1e..543a3fb2 100644
--- a/core/iwasm/libraries/lib-socket/test/nslookup.c
+++ b/core/iwasm/libraries/lib-socket/test/nslookup.c
@@ -5,6 +5,8 @@
 
 #include <assert.h>
 #include <string.h>
+#include <stdio.h>
+#include <pthread.h>
 #ifdef __wasi__
 #include <wasi/api.h>
 #include <sys/socket.h>
@@ -39,11 +41,27 @@ test_nslookup(int af)
     freeaddrinfo(res);
 }
 
+void *
+test_nslookup_mt(void *params)
+{
+    int *af = (int *)params;
+    test_nslookup(*af);
+}
+
 int
 main()
 {
-    test_nslookup(AF_INET);  /* for ipv4 */
-    test_nslookup(AF_INET6); /* for ipv6 */
+    int afs[] = { AF_INET, AF_INET6 };
+
+    for (int i = 0; i < sizeof(afs) / sizeof(afs[0]); i++) {
+        pthread_t th;
+
+        printf("Testing %d in main thread...\n", afs[i]);
+        test_nslookup(afs[i]);
+        printf("Testing %d in a new thread...\n", afs[i]);
+        pthread_create(&th, NULL, test_nslookup_mt, &afs[i]);
+        pthread_join(th, NULL);
+    }
 
     return 0;
 }