diff --git a/EnvelopeGenerator.Application/SQL/ParamsExtensions.cs b/EnvelopeGenerator.Application/SQL/ParamsExtensions.cs
index 2558eb5e..9f8ad1ec 100644
--- a/EnvelopeGenerator.Application/SQL/ParamsExtensions.cs
+++ b/EnvelopeGenerator.Application/SQL/ParamsExtensions.cs
@@ -1,4 +1,6 @@
-namespace EnvelopeGenerator.Application.SQL;
+using System.Globalization;
+
+namespace EnvelopeGenerator.Application.SQL;
 
 /// <summary>
 /// Extension method for converting objects to SQL parameter strings.
@@ -19,7 +21,7 @@ public static class ParamsExtensions
         else if (obj is bool boolVal)
             return boolVal ? "1" : "0";
         else if (obj is double doubleVal)
-            return $"'{doubleVal}'";
+            return $"'{doubleVal.ToString(CultureInfo.InvariantCulture)}'";
         else if (obj is int intVal)
             return intVal.ToString();
         else