diff --git a/CHANGES.md b/CHANGES.md
index 0317e4762e..9907f43620 100644
--- a/CHANGES.md
+++ b/CHANGES.md
@@ -1,6 +1,12 @@
 Libplanet changelog
 ===================
 
+Version 5.5.4
+-------------
+
+To be released.
+
+
 Version 5.5.3
 -------------
 
diff --git a/Directory.Build.props b/Directory.Build.props
index 25e5a03c66..bb9729d5a6 100644
--- a/Directory.Build.props
+++ b/Directory.Build.props
@@ -4,7 +4,7 @@
     <TargetFrameworks Condition="'$(_IsPacking)'=='true'">net6.0</TargetFrameworks>
     <TargetFramework Condition="'$(_IsPacking)'!='true'">net6.0</TargetFramework>
     <LangVersion>10</LangVersion>
-    <VersionPrefix>5.5.3</VersionPrefix>
+    <VersionPrefix>5.5.4</VersionPrefix>
     <!-- Note: don't be confused by the word "prefix" here.  It's merely a
     version without suffix like "-dev.123".  See the following examples:
     Version: 1.2.3-dev.456