diff --git a/service/Core/Configuration/ConfigEnvVars.cs b/service/Core/Configuration/ConfigEnvVars.cs
index eb4a6d2c2..78c36dd2d 100644
--- a/service/Core/Configuration/ConfigEnvVars.cs
+++ b/service/Core/Configuration/ConfigEnvVars.cs
@@ -73,7 +73,7 @@ private static Dictionary<string, string> GenerateEnvVars(object source, string
                 {
                     if (dictionary[key] != null)
                     {
-                        var dictKey = $"{fullKey}_{key}";
+                        var dictKey = $"{fullKey}__{key}";
                         result[dictKey] = dictionary[key]?.ToString() ?? string.Empty;
                     }
                 }