diff --git a/CHANGELOG.md b/CHANGELOG.md
index e2915105..f8160914 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## v1.2.62
+
+- fix throw error on empty files
+
 ## v1.2.61
 
 - fix missing cors origin header when port and crossDomainPort are the same
diff --git a/package-lock.json b/package-lock.json
index 2fc5a49e..8b10fb8f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,12 +1,12 @@
 {
   "name": "rammerhead",
-  "version": "1.2.61",
+  "version": "1.2.62",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "rammerhead",
-      "version": "1.2.61",
+      "version": "1.2.62",
       "hasInstallScript": true,
       "license": "MIT",
       "dependencies": {
diff --git a/package.json b/package.json
index a0758f60..5b01623c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "rammerhead",
-  "version": "1.2.61",
+  "version": "1.2.62",
   "description": "User friendly web proxy powered by testcafe-hammerhead",
   "main": "src/index.js",
   "scripts": {
diff --git a/src/classes/RammerheadJSFileCache.js b/src/classes/RammerheadJSFileCache.js
index 4d2f93ea..c65ee9f8 100644
--- a/src/classes/RammerheadJSFileCache.js
+++ b/src/classes/RammerheadJSFileCache.js
@@ -36,7 +36,7 @@ class RammerheadJSFileCache {
     this.lruMarker = new LRUCache({
       max: maxItems,
       maxSize: jsCacheSize,
-      sizeCalculation: n => n,
+      sizeCalculation: n => n || 1,
       dispose(_, key) {
         fs.unlinkSync(path.join(diskJsCachePath, key));
       }
@@ -55,6 +55,11 @@ class RammerheadJSFileCache {
       initFileList.sort((a, b) => a.size - b.size);
 
       for (const file of initFileList) {
+        if (!file.size) {
+          // writing probably got interrupted. so we delete the corrupted file
+          fs.unlinkSync(path.join(diskJsCachePath, file.key));
+          continue;
+        }
         this.lruMarker.set(file.key, file.size, {
           noDisposeOnSet: true
         });
diff --git a/src/classes/RammerheadJSMemCache.js b/src/classes/RammerheadJSMemCache.js
index da2da6f3..d9692805 100644
--- a/src/classes/RammerheadJSMemCache.js
+++ b/src/classes/RammerheadJSMemCache.js
@@ -4,7 +4,7 @@ class RammerheadJSMemCache {
   constructor(jsCacheSize) {
     this.lru = new LRUCache({
       maxSize: jsCacheSize,
-      sizeCalculation: n => n.length
+      sizeCalculation: n => n.length || 1
     });
   }
   get(key) {
diff --git a/src/util/addJSDiskCache.js b/src/util/addJSDiskCache.js
index afc07f88..64fda053 100644
--- a/src/util/addJSDiskCache.js
+++ b/src/util/addJSDiskCache.js
@@ -15,7 +15,10 @@ module.exports = async function (jsCache) {
     const md5 = (data) => crypto.createHash('md5').update(data).digest('hex');
 
     cacheGet = async (key) => await jsCache.get(md5(key));
-    cacheSet = async (key, value) => await jsCache.set(md5(key), value);
+    cacheSet = async (key, value) => {
+        if (!value) return;
+        await jsCache.set(md5(key), value);
+    }
 };
 
 // patch ScriptResourceProcessor