diff --git a/python/cppjswasm/js/tools/bundle.mjs b/python/cppjswasm/js/tools/bundle.mjs
index f493141..83fd0f7 100644
--- a/python/cppjswasm/js/tools/bundle.mjs
+++ b/python/cppjswasm/js/tools/bundle.mjs
@@ -23,7 +23,7 @@ const DEFAULT_BUILD = {
   target: ["es2022"],
   bundle: true,
   format: "esm",
-  minify: DEBUG,
+  minify: !DEBUG,
   sourcemap: true,
   metafile: true,
   entryNames: "[name]",
diff --git a/python/js/js/tools/bundle.mjs b/python/js/js/tools/bundle.mjs
index f493141..83fd0f7 100644
--- a/python/js/js/tools/bundle.mjs
+++ b/python/js/js/tools/bundle.mjs
@@ -23,7 +23,7 @@ const DEFAULT_BUILD = {
   target: ["es2022"],
   bundle: true,
   format: "esm",
-  minify: DEBUG,
+  minify: !DEBUG,
   sourcemap: true,
   metafile: true,
   entryNames: "[name]",
diff --git a/python/rustjswasm/js/tools/bundle.mjs b/python/rustjswasm/js/tools/bundle.mjs
index f493141..83fd0f7 100644
--- a/python/rustjswasm/js/tools/bundle.mjs
+++ b/python/rustjswasm/js/tools/bundle.mjs
@@ -23,7 +23,7 @@ const DEFAULT_BUILD = {
   target: ["es2022"],
   bundle: true,
   format: "esm",
-  minify: DEBUG,
+  minify: !DEBUG,
   sourcemap: true,
   metafile: true,
   entryNames: "[name]",