diff --git a/packages/config/lib/scripts/genEnvConfig.js b/packages/config/lib/scripts/genEnvConfig.js
index eb7669056..9c919e03e 100644
--- a/packages/config/lib/scripts/genEnvConfig.js
+++ b/packages/config/lib/scripts/genEnvConfig.js
@@ -31,7 +31,7 @@ const generateEnvConfig = async () => {
     resolve(
       `${__dirname}/../../../../config/custom-environment-variables.json`,
     ),
-    JSON.stringify(recursiveObjCheck(sourceConfig), null, 2),
+    `${JSON.stringify(recursiveObjCheck(sourceConfig), null, 2)}\n`,
   )
 }
 
diff --git a/packages/locales/lib/missing.js b/packages/locales/lib/missing.js
index 3e26edc9e..5f68b7a52 100644
--- a/packages/locales/lib/missing.js
+++ b/packages/locales/lib/missing.js
@@ -41,7 +41,7 @@ async function missingAll() {
             ? fileName.replace('.json', '.js')
             : fileName,
         ),
-        JSON.stringify(missingKeys, null, 2),
+        `${JSON.stringify(missingKeys, null, 2)}\n`,
       )
       log.info(TAGS.locales, fileName, 'file saved.')
     }),
diff --git a/packages/locales/lib/utils.js b/packages/locales/lib/utils.js
index d20bfa01f..7a258eb6b 100644
--- a/packages/locales/lib/utils.js
+++ b/packages/locales/lib/utils.js
@@ -67,10 +67,11 @@ function readLocaleDirectory(human = false) {
 async function writeJson(translations, ...directories) {
   try {
     const resolved = resolve(...directories)
-    const file =
+    const contents =
       typeof translations === 'string'
         ? translations
         : JSON.stringify(translations, null, 2)
+    const file = contents.endsWith('\n') ? contents : `${contents}\n`
 
     await fs.writeFile(resolved, file, 'utf8')
     log.info(TAGS.locales, 'wrote file', `${resolved.split('/').pop()}`)
diff --git a/packages/masterfile/lib/index.js b/packages/masterfile/lib/index.js
index 920d076ec..3ad7b8f22 100644
--- a/packages/masterfile/lib/index.js
+++ b/packages/masterfile/lib/index.js
@@ -69,7 +69,7 @@ const generate = async (save = false, historicRarity = {}, dbRarity = {}) => {
   if (save) {
     await fs.promises.writeFile(
       resolve(`${__dirname}/data/masterfile.json`),
-      JSON.stringify(newMf, null, 2),
+      `${JSON.stringify(newMf, null, 2)}\n`,
       'utf8',
     )
   }