diff --git a/build.lua b/build.lua
index 0898581..780af9c 100644
--- a/build.lua
+++ b/build.lua
@@ -23,13 +23,13 @@ end
 tagfiles         = {"*.dtx","presenter.tex"}
 function update_tag(file, content, tagname, tagdate)
     local iso = "%d%d%d%d%-%d%d%-%d%d"
-    local ver = "v%d.%d.%d"
+    local ver = "%d.%d.%d"
     if string.match(file, "%.dtx$") then
         return string.gsub(content, "{" .. iso .. "}{" .. ver .. "}", 
         "{" .. tagdate .. "}{" .. tagname .. "}")
     elseif string.match(file, "%.tex$") then
-        return string.gsub(content, "\\date{" .. iso .. " \\quad " .. ver .. "}",
-        "\\date{" .. tagdate .. " \\quad " .. tagname .. "}")
+        return string.gsub(content, "\\date{" .. iso .. " \\quad v" .. ver .. "}",
+        "\\date{" .. tagdate .. " \\quad v" .. tagname .. "}")
     end
     return content
 end
\ No newline at end of file
diff --git a/source/presenter.dtx b/source/presenter.dtx
index 688037d..2276ab8 100644
--- a/source/presenter.dtx
+++ b/source/presenter.dtx
@@ -24,7 +24,7 @@
 %<class>\ProvidesExplClass
 %<package>\ProvidesExplPackage
   {presenter}
-  {2023-07-03}{v0.4.0}
+  {2023-07-03}{0.4.0}
 %<class>  {A LaTeX presentation framework with seamless migration (class)}
 %<package>  {A LaTeX presentation framework with seamless migration (package)}
 %</class|package>
diff --git a/source/pretbg.dtx b/source/pretbg.dtx
index 1b9eda5..c70eb4a 100644
--- a/source/pretbg.dtx
+++ b/source/pretbg.dtx
@@ -23,7 +23,7 @@
 %<default>  {pretbg-default}
 %<block>  {pretbg-block}
 %<iiiblock>  {pretbg-iiiblock}
-  {2023-07-03}{v0.4.0}
+  {2023-07-03}{0.4.0}
 %<default>  {default background style for presenter}
 %<block>  {block background style for presenter}
 %<iiiblock>  {block background style for presenter implemented in l3draw}
diff --git a/source/pretfg.dtx b/source/pretfg.dtx
index 41a71b6..cf0746b 100644
--- a/source/pretfg.dtx
+++ b/source/pretfg.dtx
@@ -23,7 +23,7 @@
 %<default>  {pretfg-default}
 %<dual>  {pretfg-dual}
 %<cascade>  {pretfg-cascade}
-  {2023-07-03}{v0.4.0}
+  {2023-07-03}{0.4.0}
 %<default>  {default foreground style for presenter}
 %<dual>  {dual foreground style for presenter}
 %<cascade>  {cascade foreground style for presenter}
diff --git a/source/pretsec.dtx b/source/pretsec.dtx
index c0b2d74..3815aa7 100644
--- a/source/pretsec.dtx
+++ b/source/pretsec.dtx
@@ -21,7 +21,7 @@
 % \iffalse
 %<*package>
 \NeedsTeXFormat{LaTeX2e}[2020/10/01]
-\ProvidesExplPackage{pretsec}{2023-07-03}{v0.4.0}
+\ProvidesExplPackage{pretsec}{2023-07-03}{0.4.0}
   {sectioning support pack for presenter}
 %</package>
 % \fi