diff --git a/OpenRA.Mods.Common/UtilityCommands/Documentation/ExtractSpriteSequenceDocsCommand.cs b/OpenRA.Mods.Common/UtilityCommands/Documentation/ExtractSpriteSequenceDocsCommand.cs
index 863d43f8c5..99ce78d8e9 100644
--- a/OpenRA.Mods.Common/UtilityCommands/Documentation/ExtractSpriteSequenceDocsCommand.cs
+++ b/OpenRA.Mods.Common/UtilityCommands/Documentation/ExtractSpriteSequenceDocsCommand.cs
@@ -13,7 +13,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Reflection;
-using Newtonsoft.Json;
+using System.Text.Json;
 using OpenRA.Graphics;
 using OpenRA.Mods.Common.Graphics;
 using OpenRA.Mods.Common.UtilityCommands.Documentation.Objects;
@@ -97,7 +97,7 @@ namespace OpenRA.Mods.Common.UtilityCommands.Documentation
 				RelatedEnums = DocumentationHelpers.GetRelatedEnumInfos(relatedEnumTypes)
 			};
 
-			return JsonConvert.SerializeObject(result);
+			return JsonSerializer.Serialize(result);
 		}
 	}
 }
diff --git a/OpenRA.Mods.Common/UtilityCommands/Documentation/ExtractTraitDocsCommand.cs b/OpenRA.Mods.Common/UtilityCommands/Documentation/ExtractTraitDocsCommand.cs
index ef47fb4724..fe1e8938a1 100644
--- a/OpenRA.Mods.Common/UtilityCommands/Documentation/ExtractTraitDocsCommand.cs
+++ b/OpenRA.Mods.Common/UtilityCommands/Documentation/ExtractTraitDocsCommand.cs
@@ -12,7 +12,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using Newtonsoft.Json;
+using System.Text.Json;
 using OpenRA.Mods.Common.UtilityCommands.Documentation.Objects;
 using OpenRA.Primitives;
 using OpenRA.Traits;
@@ -76,7 +76,7 @@ namespace OpenRA.Mods.Common.UtilityCommands.Documentation
 				RelatedEnums = DocumentationHelpers.GetRelatedEnumInfos(relatedEnumTypes)
 			};
 
-			return JsonConvert.SerializeObject(result);
+			return JsonSerializer.Serialize(result);
 		}
 
 		static IEnumerable<Type> RequiredTraitTypes(Type t)
diff --git a/OpenRA.Mods.Common/UtilityCommands/Documentation/ExtractWeaponDocsCommand.cs b/OpenRA.Mods.Common/UtilityCommands/Documentation/ExtractWeaponDocsCommand.cs
index 7dac303a56..ab694b7be4 100644
--- a/OpenRA.Mods.Common/UtilityCommands/Documentation/ExtractWeaponDocsCommand.cs
+++ b/OpenRA.Mods.Common/UtilityCommands/Documentation/ExtractWeaponDocsCommand.cs
@@ -12,7 +12,7 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
-using Newtonsoft.Json;
+using System.Text.Json;
 using OpenRA.GameRules;
 using OpenRA.Mods.Common.UtilityCommands.Documentation.Objects;
 using OpenRA.Primitives;
@@ -79,7 +79,7 @@ namespace OpenRA.Mods.Common.UtilityCommands.Documentation
 				RelatedEnums = DocumentationHelpers.GetRelatedEnumInfos(relatedEnumTypes)
 			};
 
-			return JsonConvert.SerializeObject(result);
+			return JsonSerializer.Serialize(result);
 		}
 	}
 }