diff --git a/src/sly/lexer/LexerPosition.cs b/src/sly/lexer/LexerPosition.cs
index ee04922f..db610723 100644
--- a/src/sly/lexer/LexerPosition.cs
+++ b/src/sly/lexer/LexerPosition.cs
@@ -2,6 +2,7 @@
 using System.Collections.Generic;
 using System.Collections.Immutable;
 using System.Diagnostics.CodeAnalysis;
+using Newtonsoft.Json;
 
 namespace sly.lexer
 
@@ -18,33 +19,19 @@ public LexerPosition(int index, int line, int column, string mode = ModeAttribut
             Index = index;
             Line = line;
             Column = column;
-            Indentations = ImmutableStack<string>.Empty;
-            Indentations2 = new List<string>();
             Mode = mode;
         }
         
-        public LexerPosition(int index, int line, int column, ImmutableStack<string> indentations, IList<string> indentations2, string mode = ModeAttribute.DefaultLexerMode) : this(index, line, column, mode)
-        {
-            Indentations = indentations;
-            Indentations2 = indentations2;
-        }
-        
-        public LexerPosition(int index, int line, int column, ImmutableStack<string> indentations, IList<string> indentations2, int currentIndentation, string mode = ModeAttribute.DefaultLexerMode) : this(index, line, column, indentations, indentations2, mode)
+        public LexerPosition(int index, int line, int column, int currentIndentation, string mode = ModeAttribute.DefaultLexerMode) : this(index, line, column, mode)
         {
             CurrentIndentation = currentIndentation;
-            Indentations2 = indentations2;
         }
 
         public bool IsStartOfLine => Column == 0;
 
-
-        public ImmutableStack<string> Indentations { get; set; }
-        
-        public IList<string> Indentations2 { get; set; }
-
-        public string PreviousIndentation { get; set; } = "";
         public int CurrentIndentation { get; set; }
 
+        [JsonIgnore]
         public LexerIndentation Indentation { get; set; } = new LexerIndentation();
 
         public int Column { get; set; }
@@ -81,7 +68,7 @@ public int CompareTo(object obj)
 
         public LexerPosition Clone()
         {
-            return new LexerPosition(Index, Line, Column, Indentations, Indentations2, CurrentIndentation)
+            return new LexerPosition(Index, Line, Column, CurrentIndentation)
             {
                 Indentation = this.Indentation.Clone(),
                 Mode = Mode
diff --git a/src/sly/lexer/Token.cs b/src/sly/lexer/Token.cs
index f897c3aa..8f3025f5 100644
--- a/src/sly/lexer/Token.cs
+++ b/src/sly/lexer/Token.cs
@@ -188,6 +188,7 @@ public Token<T> Previous(int channelId)
         
         public bool IsUnIndent { get; set; } = false;
 
+        [JsonIgnore]
         public bool IsNoIndent { get; set; } = false;
 
         public bool IsIndentation => IsIndent || IsUnIndent || IsNoIndent;
diff --git a/src/sly/lexer/fsm/FSMLexer.cs b/src/sly/lexer/fsm/FSMLexer.cs
index 5a4da5e0..aef21580 100644
--- a/src/sly/lexer/fsm/FSMLexer.cs
+++ b/src/sly/lexer/fsm/FSMLexer.cs
@@ -317,7 +317,7 @@ private FSMMatch<N> ConsumeIndents3(ReadOnlyMemory<char> source, LexerPosition l
                 {
                     case LexerIndentationType.Indent:
                     {
-                        var indent = FSMMatch<N>.Indent(lexerPosition.Indentations.Count<string>() + 1);
+                        var indent = FSMMatch<N>.Indent(lexerPosition.Indentation.CurrentLevel);
                         indent.Result = new Token<N>
                         {
                             IsIndent = true,
@@ -331,14 +331,11 @@ private FSMMatch<N> ConsumeIndents3(ReadOnlyMemory<char> source, LexerPosition l
                         indent.NewPosition = lexerPosition.Clone();
                         indent.NewPosition.Index += currentShift.Length;
                         indent.NewPosition.Column += currentShift.Length;
-                        indent.NewPosition.Indentations = indent.NewPosition.Indentations.Push(currentShift);
-                        indent.NewPosition.Indentations2.Add(currentShift);
-                        indent.NewPosition.PreviousIndentation = currentShift;
                         return indent;
                     }
                     case LexerIndentationType.UIndent:
                     {
-                        var uIndent = FSMMatch<N>.UIndent(lexerPosition.Indentations.Count<string>() + 1);
+                        var uIndent = FSMMatch<N>.UIndent(lexerPosition.Indentation.CurrentLevel);
                         uIndent.Result = new Token<N>
                         {
                             IsIndent = false,
@@ -352,22 +349,17 @@ private FSMMatch<N> ConsumeIndents3(ReadOnlyMemory<char> source, LexerPosition l
                         uIndent.NewPosition = lexerPosition.Clone();
                         uIndent.NewPosition.Index += currentShift.Length;
                         uIndent.NewPosition.Column += currentShift.Length;
-                        uIndent.NewPosition.Indentations = uIndent.NewPosition.Indentations.Push(currentShift);
-                        uIndent.NewPosition.Indentations2.Add(currentShift);
-                        uIndent.NewPosition.PreviousIndentation = currentShift;
                         return uIndent;
                     }
                     case LexerIndentationType.None:
                     {
-                        var noIndent = FSMMatch<N>.Indent(lexerPosition.Indentations.Count<string>());
+                        var noIndent = FSMMatch<N>.Indent(lexerPosition.Indentation.CurrentLevel);
                         noIndent.IsNoIndent = true;
                         noIndent.IsIndent = false;
                         noIndent.IsUnIndent = false;
                         noIndent.NewPosition = lexerPosition.Clone();
                         noIndent.NewPosition.Index += currentShift.Length;
                         noIndent.NewPosition.Column += currentShift.Length;
-                        noIndent.NewPosition.PreviousIndentation = currentShift;
-                        
                         return noIndent;
                     }
                     case LexerIndentationType.Error:
diff --git a/src/sly/sly.csproj b/src/sly/sly.csproj
index 2f3a8ce6..f00abb0f 100644
--- a/src/sly/sly.csproj
+++ b/src/sly/sly.csproj
@@ -6,10 +6,10 @@
     <AllowedOutputExtensionsInPackageBuildOutputFolder>$(AllowedOutputExtensionsInPackageBuildOutputFolder);.pdb</AllowedOutputExtensionsInPackageBuildOutputFolder>
     <Description>#LY is a parser generator halfway between parser combinators and parser generator like ANTLR</Description>
     <Authors>b3b00</Authors>
-    <version>3.2.2</version>
+    <version>3.2.3</version>
     <PackageProjectUrl>https://github.com/b3b00/sly</PackageProjectUrl>
     <RepositoryUrl>https://github.com/b3b00/sly</RepositoryUrl>    
-    <PackageVersion>3.2.2</PackageVersion>
+    <PackageVersion>3.2.3</PackageVersion>
     <ApplicationIcon/>
     <OutputType>Library</OutputType>
     <StartupObject/>