diff --git a/src/Strata.SqlTools.LinqToSql/Visitors/LinqExpressionVisitor.cs b/src/Strata.SqlTools.LinqToSql/Visitors/LinqExpressionVisitor.cs
index c4b3e20..ab548fb 100644
--- a/src/Strata.SqlTools.LinqToSql/Visitors/LinqExpressionVisitor.cs
+++ b/src/Strata.SqlTools.LinqToSql/Visitors/LinqExpressionVisitor.cs
@@ -303,7 +303,7 @@ public class LinqExpressionVisitor : ExpressionVisitor
         return string.IsNullOrEmpty(name) ? "*" : name;
     }
 
-    private string ExtractMemberName(Expression expression)
+    private static string ExtractMemberName(Expression expression)
     {
         if (expression is MemberExpression member)
         {
diff --git a/src/Strata.SqlTools.Markdown/Expressions/ExpressionGenerator.cs b/src/Strata.SqlTools.Markdown/Expressions/ExpressionGenerator.cs
index 706d197..8f19153 100644
--- a/src/Strata.SqlTools.Markdown/Expressions/ExpressionGenerator.cs
+++ b/src/Strata.SqlTools.Markdown/Expressions/ExpressionGenerator.cs
@@ -245,7 +245,7 @@ public class ExpressionGenerator : IVisitor<string>
     /// <summary>
     /// Generates a Mermaid tree diagram from an Expression tree.
     /// </summary>
-    private string GenerateMermaidDiagram(Expression expression)
+    private static string GenerateMermaidDiagram(Expression expression)
     {
         var sb = new StringBuilder();
         sb.AppendLine("```mermaid");