diff --git a/environments/tool_call_parsers/deepseek_v3_parser.py b/environments/tool_call_parsers/deepseek_v3_parser.py
index 5356b1a67..2d24ed330 100644
--- a/environments/tool_call_parsers/deepseek_v3_parser.py
+++ b/environments/tool_call_parsers/deepseek_v3_parser.py
@@ -38,7 +38,8 @@ class DeepSeekV3ToolCallParser(ToolCallParser):
 
     # Regex captures: type, function_name, function_arguments
     PATTERN = re.compile(
-        r"<｜tool▁call▁begin｜>(?P<type>.*)<｜tool▁sep｜>(?P<function_name>.*)\n```json\n(?P<function_arguments>.*)\n```<｜tool▁call▁end｜>"
+        r"<｜tool▁call▁begin｜>(?P<type>.*)<｜tool▁sep｜>(?P<function_name>.*)\n```json\n(?P<function_arguments>.*)\n```<｜tool▁call▁end｜>",
+        re.DOTALL,
     )
 
     def parse(self, text: str) -> ParseResult: