diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..ed5f0d5
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,15 @@
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{ts,js,css}]
+charset = utf-8
+indent_style = space
+indent_size = 4
+
+[*.{json,mjs}]
+charset = utf-8
+indent_style = space
+indent_size = 2
diff --git a/version-bump.mjs b/version-bump.mjs
index d409fa0..e244ab7 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, 2));
 
 // 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, 2));