diff --git a/src/runner.zig b/src/runner.zig
index 36c4687..a9ea3e3 100644
--- a/src/runner.zig
+++ b/src/runner.zig
@@ -40,6 +40,8 @@ pub const Runner = struct {
         if (self.image) |image| {
             image.close();
         }
+
+        std.process.argsFree(self.allocator, self.args);
     }
 
     pub fn clone(self: *Runner) !Runner {
@@ -117,6 +119,7 @@ pub const Runner = struct {
         }
     }
 
+    /// Caller owns returned memory.
     fn makeGlitchedPath(self: *Runner) ![]const u8 {
         // we want to transform basename, if it is "x.bmp" to "x_gN.bmp", where
         // N is the maximum non-used integer.
@@ -180,6 +183,7 @@ pub const Runner = struct {
     fn quicksaveCmd(self: *Runner) !void {
         var image = try self.getImage();
         const out_path = try self.makeGlitchedPath();
+        defer self.allocator.free(out_path);
         try image.saveTo(out_path);
     }
 
@@ -187,6 +191,7 @@ pub const Runner = struct {
         const runqs = cmd.cast(lang.Command.RunQS).?;
         var image = try self.getImage();
         const out_path = try self.makeGlitchedPath();
+        defer self.allocator.free(out_path);
         try image.saveTo(out_path);
 
         var proc = try std.ChildProcess.init(