diff --git a/src/Commands/GC.cs b/src/Commands/GC.cs
index 61735f53..393b915e 100644
--- a/src/Commands/GC.cs
+++ b/src/Commands/GC.cs
@@ -10,7 +10,7 @@ namespace SourceGit.Commands
             WorkingDirectory = repo;
             Context = repo;
             TraitErrorAsOutput = true;
-            Args = "gc --prune";
+            Args = "gc --prune=now";
         }
 
         protected override void OnReadline(string line)