diff --git a/ShareX.HelpersLib/Extensions/StringExtensions.cs b/ShareX.HelpersLib/Extensions/StringExtensions.cs
index faa5ca008..916642f3d 100644
--- a/ShareX.HelpersLib/Extensions/StringExtensions.cs
+++ b/ShareX.HelpersLib/Extensions/StringExtensions.cs
@@ -31,6 +31,11 @@ namespace ShareX.HelpersLib
 {
     public static class StringExtensions
     {
+        public static bool Contains(this string str, string value, StringComparison comparisonType)
+        {
+            return str.IndexOf(value, comparisonType) >= 0;
+        }
+
         public static string Left(this string str, int length)
         {
             if (length < 1) return string.Empty;
diff --git a/ShareX.HistoryLib/HistoryForm.cs b/ShareX.HistoryLib/HistoryForm.cs
index c0fc3c94e..87692edbc 100644
--- a/ShareX.HistoryLib/HistoryForm.cs
+++ b/ShareX.HistoryLib/HistoryForm.cs
@@ -124,7 +124,7 @@ private HistoryItem[] ApplyFilters(HistoryItem[] historyItems)
 
                 if (!string.IsNullOrEmpty(host))
                 {
-                    result = result.Where(x => !string.IsNullOrEmpty(x.Host) && x.Host.IndexOf(host, StringComparison.InvariantCultureIgnoreCase) >= 0);
+                    result = result.Where(x => !string.IsNullOrEmpty(x.Host) && x.Host.Contains(host, StringComparison.InvariantCultureIgnoreCase));
                 }
             }
 
@@ -138,7 +138,7 @@ private HistoryItem[] ApplyFilters(HistoryItem[] historyItems)
 
                     if (cbFilenameFilterMethod.SelectedIndex == 0) // Contains
                     {
-                        result = result.Where(x => x.Filename.IndexOf(filenameFilter, rule) >= 0);
+                        result = result.Where(x => x.Filename.Contains(filenameFilter, rule));
                     }
                     else if (cbFilenameFilterMethod.SelectedIndex == 1) // Starts with
                     {