diff --git a/X10D/src/Collections/DictionaryExtensions.cs b/X10D/src/Collections/DictionaryExtensions.cs
index 86ae231..67872aa 100644
--- a/X10D/src/Collections/DictionaryExtensions.cs
+++ b/X10D/src/Collections/DictionaryExtensions.cs
@@ -227,7 +227,7 @@ public static class DictionaryExtensions
                 return string.Empty;
             }
 
-            return value.Contains(' ') ? $"\"{value}\"" : value;
+            return value.Contains(' ', StringComparison.Ordinal) ? $"\"{value}\"" : value;
         }
 
         static string GetQueryParameter(KeyValuePair<TKey, TValue> pair)
@@ -282,7 +282,7 @@ public static class DictionaryExtensions
                 return string.Empty;
             }
 
-            return value.Contains(' ') ? $"\"{value}\"" : value;
+            return value.Contains(' ', StringComparison.Ordinal) ? $"\"{value}\"" : value;
         }
 
         string GetQueryParameter(KeyValuePair<TKey, TValue> pair)
@@ -351,7 +351,7 @@ public static class DictionaryExtensions
                 return string.Empty;
             }
 
-            return value.Contains(' ') ? $"\"{value}\"" : value;
+            return value.Contains(' ', StringComparison.Ordinal) ? $"\"{value}\"" : value;
         }
 
         string GetQueryParameter(KeyValuePair<TKey, TValue> pair)