diff --git a/metagpt/environment/werewolf/const.py b/metagpt/environment/werewolf/const.py
index 32af660ad..7f810389d 100644
--- a/metagpt/environment/werewolf/const.py
+++ b/metagpt/environment/werewolf/const.py
@@ -59,7 +59,7 @@ Or you can pass. For example: Protect ...""",
     },
     5: {
         "content": """Werewolves, I secretly tell you that {werewolf_players} are
-all of the 2 werewolves! Keep in mind you are teammates. The rest players are not werewolves.
+all of the {werewolf_num} werewolves! Keep in mind you are teammates. The rest players are not werewolves.
 choose one from the following living options please:
 {living_players}. For example: Kill ...""",
         "send_to": {RoleType.WEREWOLF.value},
diff --git a/metagpt/environment/werewolf/werewolf_ext_env.py b/metagpt/environment/werewolf/werewolf_ext_env.py
index 835981481..588fc0b9b 100644
--- a/metagpt/environment/werewolf/werewolf_ext_env.py
+++ b/metagpt/environment/werewolf/werewolf_ext_env.py
@@ -52,9 +52,11 @@ class WerewolfExtEnv(ExtEnv):
         seed: Optional[int] = None,
         options: Optional[dict[str, Any]] = None,
     ) -> tuple[dict[str, Any], dict[str, Any]]:
+        """currently unused"""
         pass
 
     def observe(self, obs_params: Optional[BaseEnvObsParams] = None) -> Any:
+        """currently unused"""
         pass
 
     def _get_obs(self):
@@ -62,7 +64,7 @@ class WerewolfExtEnv(ExtEnv):
             "game_setup": self.game_setup,
             "step_idx": self.step_idx,
             "living_players": self.living_players,
-            "werewolf_players": self.werewolf_players,
+            "werewolf_players": self.werewolf_players,  # currently, lack observation isolation
             "player_hunted": self.player_hunted,
             "player_current_dead": self.player_current_dead,
             "witch_poison_left": self.witch_poison_left,
diff --git a/metagpt/ext/werewolf/actions/common_actions.py b/metagpt/ext/werewolf/actions/common_actions.py
index 0f1b3b74c..63afeede0 100644
--- a/metagpt/ext/werewolf/actions/common_actions.py
+++ b/metagpt/ext/werewolf/actions/common_actions.py
@@ -11,6 +11,14 @@ from metagpt.logs import logger
 from metagpt.utils.common import parse_json_code_block
 
 
+def log_and_parse_json(name: str, rsp: str) -> dict:
+    rsp = rsp.replace("\n", " ")
+    logger.debug(f"{name} result: {rsp}")
+    json_blocks = parse_json_code_block(rsp)
+    rsp_json = json.loads(json_blocks[0])
+    return rsp_json
+
+
 class Speak(Action):
     """Action: Any speak action in a game"""
 
@@ -66,8 +74,7 @@ class Speak(Action):
         )
 
         rsp = await self._aask(prompt)
-        rsp = rsp.replace("\n", " ")
-        rsp_json = json.loads(rsp)
+        rsp_json = log_and_parse_json(self.name, rsp)
 
         return rsp_json["RESPONSE"]
 
@@ -183,8 +190,7 @@ class NighttimeWhispers(Action):
         )
 
         rsp = await self._aask(prompt)
-        rsp = rsp.replace("\n", " ")
-        rsp_json = json.loads(rsp)
+        rsp_json = log_and_parse_json(self.name, rsp)
 
         return f"{self.name} " + rsp_json["RESPONSE"]
 
@@ -229,9 +235,6 @@ class Reflect(Action):
         )
 
         rsp = await self._aask(prompt)
-        rsp = rsp.replace("\n", " ")
-        logger.debug(f"{self.name} result: {rsp}")
-        json_blocks = parse_json_code_block(rsp)
-        rsp_json = json.loads(json_blocks[0])
+        rsp_json = log_and_parse_json(self.name, rsp)
 
         return json.dumps(rsp_json["REFLECTION"])
diff --git a/metagpt/ext/werewolf/actions/moderator_actions.py b/metagpt/ext/werewolf/actions/moderator_actions.py
index c61397892..8f37e3bc9 100644
--- a/metagpt/ext/werewolf/actions/moderator_actions.py
+++ b/metagpt/ext/werewolf/actions/moderator_actions.py
@@ -11,7 +11,8 @@ class InstructSpeak(Action):
         )
         content = instruction_info["content"]
         if "{living_players}" in content and "{werewolf_players}" in content:
-            content = content.format(living_players=living_players, werewolf_players=werewolf_players)
+            content = content.format(living_players=living_players, werewolf_players=werewolf_players,
+                                     werewolf_num=len(werewolf_players))
         if "{living_players}" in content:
             content = content.format(living_players=living_players)
         if "{werewolf_players}" in content:
diff --git a/metagpt/utils/common.py b/metagpt/utils/common.py
index e443c3466..bd8d25013 100644
--- a/metagpt/utils/common.py
+++ b/metagpt/utils/common.py
@@ -722,7 +722,8 @@ def list_files(root: str | Path) -> List[Path]:
 
 
 def parse_json_code_block(markdown_text: str) -> List[str]:
-    json_blocks = re.findall(r"```json(.*?)```", markdown_text, re.DOTALL)
+    json_blocks = re.findall(r"```json(.*?)```", markdown_text, re.DOTALL) if "```json" in markdown_text else [markdown_text]
+
     return [v.strip() for v in json_blocks]