diff --git a/src/AdvancedCalculator/AdvancedCalculator.csproj b/src/AdvancedCalculator/AdvancedCalculator.csproj
index 52bc69e..11269ea 100644
--- a/src/AdvancedCalculator/AdvancedCalculator.csproj
+++ b/src/AdvancedCalculator/AdvancedCalculator.csproj
@@ -19,6 +19,6 @@
 
     <!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
     <PackageReference Condition="'$(Configuration)' == 'Debug'" Include="Avalonia.Diagnostics" Version="$(AvaloniaVersion)" />
-    <PackageReference Include="CSMic.StandardLibrary" Version="2.0.0-beta-03" />
+    <PackageReference Include="CSMic.StandardLibrary" Version="2.0.0-beta-04" />
   </ItemGroup>
 </Project>
diff --git a/src/AdvancedCalculator/Converters/BoolToGridLengthConverter.cs b/src/AdvancedCalculator/Converters/BoolToGridLengthConverter.cs
index d1de3fb..6f6ca9a 100644
--- a/src/AdvancedCalculator/Converters/BoolToGridLengthConverter.cs
+++ b/src/AdvancedCalculator/Converters/BoolToGridLengthConverter.cs
@@ -1,6 +1,7 @@
 using System;
 using Avalonia.Data.Converters;
 using Avalonia;
+using Avalonia.Controls;
 
 namespace AdvancedCalculator.Converters;
 
diff --git a/src/AdvancedCalculator/Services/CalculatorService.cs b/src/AdvancedCalculator/Services/CalculatorService.cs
index aaf47c2..4b43519 100644
--- a/src/AdvancedCalculator/Services/CalculatorService.cs
+++ b/src/AdvancedCalculator/Services/CalculatorService.cs
@@ -12,10 +12,12 @@ public class CalculatorService : ICalculatorService
 {
     private readonly object _lock = new();
 
-    // We attempt to use the legacy namespace to maximize compatibility.
-    // If using the newer CSMic.StandardLibrary with different namespaces,
-    // update the using directives and type names here.
-    private readonly csmic.InputInterpreter _interpreter = new();
+    private readonly CSMic.InputInterpreter _interpreter = new();
+
+    public CalculatorService()
+    {
+        CSMic.StandardLibrary.Initializer.InitializeAllFunctions(_interpreter);
+    }
 
     public Task<InterpretResult> InterpretAsync(string input)
     {
@@ -24,17 +26,17 @@ public class CalculatorService : ICalculatorService
             lock (_lock)
             {
                 _interpreter.Interpret(input);
-                var output = _interpreter.Output ?? string.Empty;
+                var output = string.IsNullOrWhiteSpace(_interpreter.StringValue) ? _interpreter.NumericValue.ToString() : _interpreter.StringValue;
 
                 // Build variables list
                 var variables = new List<VariableItem>();
-                foreach (var kvp in _interpreter.Variables)
+                foreach (var csmicVariable in _interpreter.Variables)
                 {
-                    var name = kvp.Key;
-                    var variable = kvp.Value;
-                    var valueString = variable?.Value?.ToString() ?? string.Empty;
+                    var name = csmicVariable.Name;
+                    var variable = csmicVariable.Value;
+                    var valueString = variable?.ToString() ?? string.Empty;
 
-                    var isExpression = variable?.Type == csmic.VariableType.Equation;
+                    var isExpression = csmicVariable.Type == CSMic.VariableType.Expression;
                     var item = new VariableItem
                     {
                         VariableName = name,
@@ -48,7 +50,7 @@ public class CalculatorService : ICalculatorService
                     {
                         // Compute the expression-based variable's current value
                         _interpreter.Interpret(valueString);
-                        item.ExpressionComputation = _interpreter.Output ?? string.Empty;
+                        item.ExpressionComputation = _interpreter.StringValue ?? string.Empty;
                         item.Icon = IconFont.Function;
                     }