diff --git a/nodes.py b/nodes.py
index 1be247c..b6d9a47 100644
--- a/nodes.py
+++ b/nodes.py
@@ -65,14 +65,14 @@ class AceStepMusicGen:
                 }),
                 "duration": ("FLOAT", {
                     "default": 30.0,
-                    "min": 1.0,
-                    "max": 300.0,
+                    "min": 10.0,
+                    "max": 240.0,
                     "step": 1.0,
                     "tooltip": "Audio duration in seconds",
                 }),
                 "bpm": ("INT", {
-                    "default": 0,
-                    "min": 0,
+                    "default": 30,
+                    "min": 30,
                     "max": 300,
                     "step": 1,
                     "tooltip": "Beats per minute (0 = auto)",
@@ -81,9 +81,9 @@ class AceStepMusicGen:
                     "default": "",
                     "tooltip": "Musical key and scale (e.g. 'C major', 'A minor')",
                 }),
-                "time_signature": ("STRING", {
-                    "default": "",
-                    "tooltip": "Time signature (e.g. '4/4', '3/4', '6/8')",
+                "time_signature": (["2", "3", "4", "6"], {
+                    "default": "4",
+                    "tooltip": "Time signature",
                 }),
                 "vocal_language": (["en", "zh", "ja", "ko", "es", "fr", "de", "unknown"], {
                     "default": "en",
@@ -160,7 +160,7 @@ class AceStepMusicGen:
         duration=30.0,
         bpm=0,
         key_scale="",
-        time_signature="",
+        time_signature="4",
         vocal_language="en",
         sample_mode=False,
         use_format=False,
@@ -222,7 +222,7 @@ class AceStepMusicGen:
         if bpm > 0:
             body["audio_config"]["bpm"] = bpm
         body["audio_config"]["key_scale"] = key_scale.strip() or None
-        body["audio_config"]["time_signature"] = time_signature.strip() or None
+        body["audio_config"]["time_signature"] = time_signature
         if lyrics:
             body["lyrics"] = lyrics
 
diff --git a/pyproject.toml b/pyproject.toml
index e2ee43d..aca79d5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,7 +1,7 @@
 [project]
-name = "ACE-Step-ComfyUI"
-description = "Official ComfyUI node for ACE-Step AI music generation via ACE-Step API"
-version = "0.0.2"
+name = "ACE-Step-v1.5-online-free"
+description = "Official ComfyUI node for ACE-Step v1.5 AI music generation via ACEMusic API"
+version = "0.0.3"
 license = {file = "LICENSE"}
 dependencies = [
     "torch",
@@ -21,7 +21,7 @@ Documentation = "https://github.com/ace-step/ACE-Step-ComfyUI/wiki"
 
 [tool.comfy]
 PublisherId = "ace-step"
-DisplayName = "ACE-Step-ComfyUI"
+DisplayName = "ACE-Step-v1.5-online-free"
 Icon = ""
 includes = ["__init__.py", "nodes.py", "requirements.txt", "js/"]
 # "requires-comfyui" = ">=1.0.0"  # ComfyUI version compatibility