diff --git a/CHANGELOG.md b/CHANGELOG.md
index dc67f2f0..0491c8e5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,12 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/) and this p
 
 Please see [here](https://github.com/hrntsm/Tunny/releases) for the data released for each version.
 
+## [v0.9.1] -2023-12-30
+
+### Fixed
+
+- Error generated due to missing path in settings on first startup.
+
 ## [v0.9.0] -2023-12-30
 
 ### Added
diff --git a/Tunny/Settings/TunnySettings.cs b/Tunny/Settings/TunnySettings.cs
index 8bd9f4af..15c8230a 100644
--- a/Tunny/Settings/TunnySettings.cs
+++ b/Tunny/Settings/TunnySettings.cs
@@ -1,3 +1,4 @@
+using System.IO;
 using System.Reflection;
 
 using Newtonsoft.Json;
@@ -16,7 +17,12 @@ public class TunnySettings
         public void Serialize(string path)
         {
             string json = JsonConvert.SerializeObject(this, Formatting.Indented);
-            System.IO.File.WriteAllText(path, json);
+            string dirPath = Path.GetDirectoryName(path);
+            if (!Directory.Exists(dirPath))
+            {
+                Directory.CreateDirectory(dirPath);
+            }
+            File.WriteAllText(path, json);
         }
 
         public static TunnySettings Deserialize(string json)
diff --git a/Tunny/Tunny.csproj b/Tunny/Tunny.csproj
index e6838e77..94943f57 100644
--- a/Tunny/Tunny.csproj
+++ b/Tunny/Tunny.csproj
@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <TargetFramework>net48</TargetFramework>
-    <Version>0.9.0</Version>
+    <Version>0.9.1</Version>
     <Title>Tunny</Title>
     <Description>Tunny is an optimization component wrapped in optuna.</Description>
     <TargetExt>.gha</TargetExt>
diff --git a/Tunny/TunnyInfo.cs b/Tunny/TunnyInfo.cs
index 8476e197..50eccd88 100644
--- a/Tunny/TunnyInfo.cs
+++ b/Tunny/TunnyInfo.cs
@@ -10,7 +10,7 @@ namespace Tunny
     public class Tunny : GH_AssemblyInfo
     {
         public override string Name => "Tunny";
-        public override string Version => "0.9.0";
+        public override string Version => "0.9.1";
         public override Bitmap Icon => Resource.TunnyIcon;
         public override string Description => "Tunny is an optimization component wrapped in optuna.";
         public override Guid Id => new Guid("01E58960-AFAA-48FF-BC90-174FDC4A9D64");
diff --git a/Yak/manifest.yml b/Yak/manifest.yml
index cd758d0c..7e341c3f 100644
--- a/Yak/manifest.yml
+++ b/Yak/manifest.yml
@@ -1,8 +1,8 @@
 ---
 name: Tunny
-version: 0.9.0
+version: 0.9.1
 authors:
-- hrntsm
+  - hrntsm
 description: 🐟Tunny🐟 is Grasshopper's optimization component using Optuna, an open source hyperparameter auto-optimization framework. Tunny includes some features such as multi-objective optimization with constraint, Quasi-MonteCarlo sampling and dashboards for results analysis etc.
 url: https://tunny-docs.deno.dev/
 keywords: