diff --git a/version-bump.mjs b/version-bump.mjs
index d409fa0..44f4474 100644
--- a/version-bump.mjs
+++ b/version-bump.mjs
@@ -6,9 +6,9 @@ const targetVersion = process.env.npm_package_version;
 let manifest = JSON.parse(readFileSync("manifest.json", "utf8"));
 const { minAppVersion } = manifest;
 manifest.version = targetVersion;
-writeFileSync("manifest.json", JSON.stringify(manifest, null, "\t"));
+writeFileSync("manifest.json", JSON.stringify(manifest, null, "  "));
 
 // update versions.json with target version and minAppVersion from manifest.json
 let versions = JSON.parse(readFileSync("versions.json", "utf8"));
 versions[targetVersion] = minAppVersion;
-writeFileSync("versions.json", JSON.stringify(versions, null, "\t"));
+writeFileSync("versions.json", JSON.stringify(versions, null, "  "));