diff --git a/nlpir/__init__.py b/nlpir/__init__.py
index 1cf6b1f..f14df4e 100644
--- a/nlpir/__init__.py
+++ b/nlpir/__init__.py
@@ -7,7 +7,7 @@
 import functools
 from .exception import NLPIRException
 
-__version__ = "0.9.9"
+__version__ = "0.9.10"
 PACKAGE_DIR = os.path.abspath(os.path.dirname(__file__))
 logger = logging.getLogger("nlpir")
 
diff --git a/nlpir/doc_extractor.py b/nlpir/doc_extractor.py
index 678fe90..5b2e376 100644
--- a/nlpir/doc_extractor.py
+++ b/nlpir/doc_extractor.py
@@ -72,8 +72,8 @@ def __init__(self, handle: int, user_retrieve_type: typing.List[str]):
         }
 
         self.re_sharp_split = re.compile(r"([^#]+)#"), lambda _: {0: _}
-        self.re_key_words = re.compile(r"(.+?)/([a-z0-9A-Z]+?)/([.\d]+?)/(\d+)?#"), lambda _: {0: _[0], 1: _[1],
-                                                                                               2: _[2], 3: _[3]}
+        self.re_key_words = re.compile(r"([^/^#]+)/([^/^#]+)/([.\d]+?)/(\d+)?#"), lambda _: {0: _[0], 1: _[1],
+                                                                                             2: _[2], 3: _[3]}
         self.re_weight = re.compile(r"(.+?)/(\d+)#"), lambda _: {0: _[0], 2: _[1]}
         self.re_none = re.compile("(.+)"), lambda _: {0: _}
         self.re_result_map = {