diff --git a/stdlib/src/canvas.rs b/stdlib/src/canvas.rs
index d7dee547..644dd36a 100644
--- a/stdlib/src/canvas.rs
+++ b/stdlib/src/canvas.rs
@@ -1,6 +1,7 @@
 use crate::{StdFunction, StdlibModule, StdlibRegistry};
 use std::cell::RefCell;
 use std::collections::HashMap;
+use std::fmt::Write;
 use std::rc::Rc;
 use techscript_runtime::{
     context::RuntimeContext, error::RuntimeError, function::Callable, value::RuntimeValue,
@@ -132,10 +133,11 @@ fn dsl_to_svg(val: &RuntimeValue, is_dragon: bool) -> String {
                         for i in 0..count {
                             let r = 80 + i as i64 * (size / 2);
                             let opacity = 0.4 - (i as f32 * 0.08);
-                            svg.push_str(&format!(
+                            let _ = write!(
+                                svg,
                                 r#"<circle cx="250" cy="180" r="{}" fill="none" stroke="{}" stroke-width="{}" opacity="{}"/>"#,
                                 r, color, thickness, opacity
-                            ));
+                            );
                         }
                     }
                     "emblem" => {