diff --git a/tagmark/core/data.py b/tagmark/core/data.py
index d3ce51d..a3b4438 100644
--- a/tagmark/core/data.py
+++ b/tagmark/core/data.py
@@ -1,6 +1,7 @@
 import json
 import re
 from dataclasses import dataclass, field
+from urllib.parse import quote_plus
 from pathlib import Path
 from typing import Iterable
 
@@ -257,6 +258,10 @@ def count_total(self):
     def count_github(self):
         return self.filtered_tagmark.count_github_url
 
+    @property
+    def as_url_param(self):
+        return quote_plus(self.value)
+
     def filter(
         self,
         tagmark: Tagmark,
diff --git a/tagmark/tools/maketagdoc.toml.default b/tagmark/tools/maketagdoc.toml.default
index 05aff77..db08a57 100644
--- a/tagmark/tools/maketagdoc.toml.default
+++ b/tagmark/tools/maketagdoc.toml.default
@@ -14,7 +14,7 @@ regex = "{{((.*?):(.*?))}}"
 [formatter.value.format_expression]
 total = "[All TagMarks]({url_base}) `Total {filter.count_total} (Github {filter.count_github})`"
 tag = "{tag_item.formatted_name}"   # `tag_item` is the instance on tagmark.core.tag.TagItem
-filter = "{url_base}/?tags={filter.value}" # `filter` is the instance of tagmark.core.data.TagmarkFilter
-tag_filter_counts = "[{tag_item.formatted_name}]({url_base}/?tags={filter.value}) `Total {filter.count_total} (Github {filter.count_github})`"
-tag_filter = "[{tag_item.formatted_name}]({url_base}/?tags={filter.value})"
-filter_counts = "({url_base}/?tags={filter.value}) `Total {filter.count_total} (Github {filter.count_github})`"
\ No newline at end of file
+filter = "{url_base}/?tags={filter.as_url_param}" # `filter` is the instance of tagmark.core.data.TagmarkFilter
+tag_filter_counts = "[{tag_item.formatted_name}]({url_base}/?tags={filter.as_url_param}) `Total {filter.count_total} (Github {filter.count_github})`"
+tag_filter = "[{tag_item.formatted_name}]({url_base}/?tags={filter.as_url_param})"
+filter_counts = "({url_base}/?tags={filter.as_url_param}) `Total {filter.count_total} (Github {filter.count_github})`"
\ No newline at end of file
diff --git a/tests/data/maketagdoc_result.md b/tests/data/maketagdoc_result.md
index bcfe195..3f4d089 100644
--- a/tests/data/maketagdoc_result.md
+++ b/tests/data/maketagdoc_result.md
@@ -2,6 +2,6 @@
 
 * [All TagMarks](https://pwnfan.github.io/tagmark) `Total 2 (Github 2)`
 
-* test line #1: line start, [library / moudle / package](https://pwnfan.github.io/tagmark/?tags=library) `Total 2 (Github 2)`. line middle, [development bookmarks with count](https://pwnfan.github.io/tagmark/?tags=dev) `Total 2 (Github 2)`, line end.
+* test line #1: line start, [library / package / module](https://pwnfan.github.io/tagmark/?tags=library) `Total 2 (Github 2)`. line middle, [development bookmarks with count](https://pwnfan.github.io/tagmark/?tags=dev) `Total 2 (Github 2)`, line end.
 * test line #2: {{xxxyyy}}
-* test line #3: line start, [library / moudle / package](https://pwnfan.github.io/tagmark/?tags=library). line middle, [development bookmarks without count]https://pwnfan.github.io/tagmark/?tags=dev AND license , only tag: `development` , line end.
+* test line #3: line start, [library / package / module](https://pwnfan.github.io/tagmark/?tags=library). line middle, [development bookmarks without count]https://pwnfan.github.io/tagmark/?tags=dev+AND+license , only tag: `development` , line end.