diff --git a/ParadoxSaveParser.Lib/ParsedValueJsonContext.cs b/ParadoxSaveParser.Lib/ParsedValueJsonContext.cs
index 5fff6fa..bbef300 100644
--- a/ParadoxSaveParser.Lib/ParsedValueJsonContext.cs
+++ b/ParadoxSaveParser.Lib/ParsedValueJsonContext.cs
@@ -8,6 +8,7 @@ namespace ParadoxSaveParser.Lib;
 [JsonSerializable(typeof(string))]
 [JsonSerializable(typeof(long))]
 [JsonSerializable(typeof(double))]
+[JsonSerializable(typeof(bool))]
 public partial class ParsedValueJsonContext : JsonSerializerContext
 {
 }
\ No newline at end of file
diff --git a/ParadoxSaveParser.Lib/SaveParserEU4.cs b/ParadoxSaveParser.Lib/SaveParserEU4.cs
index 8cee521..d6e07c7 100644
--- a/ParadoxSaveParser.Lib/SaveParserEU4.cs
+++ b/ParadoxSaveParser.Lib/SaveParserEU4.cs
@@ -154,19 +154,29 @@ public class SaveParserEU4
         switch (tok.type)
         {
             case TokenType.StringOrNumber:
-                // string values can be empty
-                if(tok.value!.Length == 0)
-                    return string.Empty;
-                
-                string tokStr = tok.value.ToString();
-                _stringBuilderPool.Return(tok.value);
-                if (tokStr[0] != '-' && !char.IsDigit(tokStr[0]))
+                try
+                {
+                    // string values can be empty
+                    if (tok.value!.Length == 0)
+                        return string.Empty;
+                    if (tok.value.Equals("yes"))
+                        return true;
+                    if (tok.value.Equals("no"))
+                        return false;
+                    
+                    string tokStr = tok.value.ToString();
+                    if (tokStr[0] != '-' && !char.IsDigit(tokStr[0]))
+                        return tokStr;
+                    if (tokStr.Contains('.') && double.TryParse(tokStr, out double d))
+                        return d;
+                    if (long.TryParse(tokStr, out long l))
+                        return l;
                     return tokStr;
-                if (tokStr.Contains('.') && double.TryParse(tokStr, out double d))
-                    return d;
-                if (long.TryParse(tokStr, out long l))
-                    return l;
-                return tokStr;
+                }
+                finally
+                {
+                    _stringBuilderPool.Return(tok.value!);
+                }
             case TokenType.BracketOpen:
                 object obj = ParseListOrDict();
                 return obj;
diff --git a/ParadoxSaveParser.WebAPI/Protobuf/ParsedData.proto b/ParadoxSaveParser.WebAPI/Protobuf/ParsedData.proto
index 2cc00a5..3d2c30a 100644
--- a/ParadoxSaveParser.WebAPI/Protobuf/ParsedData.proto
+++ b/ParadoxSaveParser.WebAPI/Protobuf/ParsedData.proto
@@ -3,11 +3,12 @@ option csharp_namespace = "ParadoxSaveParser.WebAPI.MyProtobuf";
 
 message Item {
   oneof value {
-    int64 i64 = 1;
-    double f64 = 2;
-    string str = 3;
-    ItemList list = 4;
-    ItemListMap map = 5;
+    bool b = 1;
+    int64 i64 = 2;
+    double f64 = 3;
+    string str = 4;
+    ItemList list = 5;
+    ItemListMap map = 6;
   }
 }