diff --git a/scripts/build.sh b/scripts/build.sh
index 75a2c87..55a3dbe 100755
--- a/scripts/build.sh
+++ b/scripts/build.sh
@@ -1,8 +1,23 @@
 #!/bin/sh
 
 SHA=$(git rev-parse --short HEAD)
+
+# Build to a temporary file
 bun build ./src/js/main.js \
-            --outfile ./public/bundle.js \
+            --outfile ./public/bundle.tmp.js \
             --target browser
-printf "////\n// version: %s\n\n" "$SHA" | cat - ./public/bundle.js > ./public/bundle.tmp.js
-mv ./public/bundle.tmp.js ./public/bundle.js
+
+# If bundle.js doesn't exist yet, fake it it
+if [ ! -f ./public/bundle.js ]; then
+    touch ./public/bundle.js
+fi
+
+# Strip version comments from both files and compare
+tail -n +4 ./public/bundle.js > ./public/bundle.old.content.tmp
+tail -n +1 ./public/bundle.tmp.js > ./public/bundle.new.content.tmp
+
+if ! cmp -s ./public/bundle.old.content.tmp ./public/bundle.new.content.tmp; then
+    printf "////\n// version: %s\n\n" "$SHA" | cat - ./public/bundle.tmp.js > ./public/bundle.js
+fi
+
+rm ./public/bundle.tmp.js ./public/bundle.old.content.tmp ./public/bundle.new.content.tmp
\ No newline at end of file