diff --git a/README.md b/README.md
index de7408f..5e98010 100644
--- a/README.md
+++ b/README.md
@@ -106,8 +106,8 @@ Shell completion scripts for Bash, Fish and Zsh can be found in respective subdi
 **NOTE:** If you are using `buku` v1.9 or below please refer to the installed man page or program help.
 
     usage: buku [-a URL [tags ...]] [-u [N [URL tags ...]]]
-                [-t [...]] [-d [N]] [-h]
-                [-s keyword [...]] [-S keyword [...]]
+                [-t [...]] [-c [...]] [-d [N]] [-h]
+                [-s keyword [...]] [-S keyword [...]] [--st keyword [...]]
                 [-k [N]] [-l [N]] [-p [N]] [-f N]
                 [-r oldtag [newtag ...]] [-j] [-o N] [-z]
 
@@ -137,6 +137,8 @@ Shell completion scripts for Bash, Fish and Zsh can be found in respective subdi
                            special keywords -
                            "tags" : list all tags alphabetically
                            "blank": list entries with empty title/tag
+      --st, --stag keyword [...]
+                           search bookmarks by tag
 
     encryption options:
       -l, --lock [N]       encrypt DB file with N (> 0, default 8)
@@ -176,6 +178,7 @@ Shell completion scripts for Bash, Fish and Zsh can be found in respective subdi
   - Substrings match (`match` matches `rematched`) for URL, title and tags.
   - `-s` : match any of the keywords in URL, title or tags.
   - `-S` : match all the keywords in URL, title or tags.
+  - `--st` : search bookmarks by tag.
   - You can search bookmarks by tag (see [examples](#examples)).
   - Search results are indexed serially. This index is different from actual database index of a bookmark record which is shown within `[]` after the URL.
 - Auto DB compaction: when a record is deleted, the last record is moved to the index.
@@ -222,7 +225,7 @@ The last index is moved to the deleted index to keep the DB compact.
 
 10. **Search** bookmarks with **tag** `general kernel concepts`:
 
-        $ buku -S ',general kernel concepts,'
+        $ buku --st general kernel concepts
 Note the commas (,) before and after the tag. Comma is the tag delimiter in DB.
 11. List **all unique tags** alphabetically:
 
diff --git a/buku b/buku
index 83eb8a6..c8990f5 100755
--- a/buku
+++ b/buku
@@ -1105,7 +1105,7 @@ argparser = ExtendedArgumentParser(
     formatter_class=argparse.RawTextHelpFormatter,
     usage='''buku [-a URL [tags ...]] [-u [N [URL tags ...]]]
             [-t [...]] [-c [...]] [-d [N]] [-h]
-            [-s keyword [...]] [-S keyword [...]]
+            [-s keyword [...]] [-S keyword [...]] [--st keyword [...]]
             [-k [N]] [-l [N]] [-p [N]] [-f N]
             [-r oldtag [newtag ...]] [-j] [-o N] [-z]''',
     add_help=False
@@ -1143,7 +1143,8 @@ search_group=argparser.add_argument_group(title="search options",
                      special keywords -
                      "tags" : list all tags alphabetically
                      "blank": list entries with empty title/tag
---st --stag tag      search bookmarks by tag''')
+--st, --stag keyword [...]
+                     search bookmarks by tag''')
 search_group.add_argument('-s', '--sany', nargs='+', metavar='keyword', help=argparse.SUPPRESS)
 search_group.add_argument('-S', '--sall', nargs='+', metavar='keyword', help=argparse.SUPPRESS)
 search_group.add_argument('--st', '--stag', nargs='+', dest='stag', metavar='keyword', help=argparse.SUPPRESS)
diff --git a/buku.1 b/buku.1
index 7efd256..bebdbd5 100644
--- a/buku.1
+++ b/buku.1
@@ -7,7 +7,7 @@ buku \- A private command-line bookmark manager. Your mini web!
 .br
      [-t [...]] [-c [...]] [-d [N]] [-h]
 .br
-     [-s keyword [...]] [-S keyword [...]]
+     [-s keyword [...]] [-S keyword [...]] [--st keyword [...]]
 .br
      [-k [N]] [-l [N]] [-p [N]] [-f N]
 .br
@@ -37,6 +37,7 @@ Search works in mysterious ways:
   - Substrings match ('match' matches 'rematched') for URL, title and tags.
   - -s : match any of the keywords in URL, title or tags.
   - -S : match all the keywords in URL, title or tags.
+  - --st : search bookmarks by tag.
   - You can search bookmarks by tag (see examples below).
   - Search results are indexed serially. This index is different from actual database index of a bookmark record which is shown within '[]' after the URL.
 .PP
@@ -87,6 +88,9 @@ Special keywords:
 "tags" : list all tags alphabetically
 .br
 "blank": list entries with empty title/tag
+.TP
+.BI \--st " " \--stag " keyword [...]"
+Search bookmarks by tag.
 .SH ENCRYPTION OPTIONS
 .TP
 .BI \-l " " \--lock " [N]"
@@ -237,7 +241,7 @@ The last index is moved to the deleted index to keep the DB compact.
 .PP
 .EX
 .IP
-.B buku -S ',general kernel concepts,'
+.B buku --st general kernel concepts
 .EE
 .PP
 .IP "" 4