diff --git a/package.json b/package.json
index a72458b7..1186c6b1 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "browsertrix-crawler",
-  "version": "1.5.10",
+  "version": "1.5.11",
   "main": "browsertrix-crawler",
   "type": "module",
   "repository": "https://github.com/webrecorder/browsertrix-crawler",
diff --git a/src/util/file_reader.ts b/src/util/file_reader.ts
index 096dd34f..9836358f 100644
--- a/src/util/file_reader.ts
+++ b/src/util/file_reader.ts
@@ -83,7 +83,9 @@ async function collectGitBehaviors(gitUrl: string): Promise<FileSources> {
 
 async function collectOnlineBehavior(url: string): Promise<FileSources> {
   const filename = crypto.randomBytes(4).toString("hex") + ".js";
-  const behaviorFilepath = `/app/behaviors/${filename}`;
+  const tmpDir = `/tmp/behaviors-${crypto.randomBytes(4).toString("hex")}`;
+  await fsp.mkdir(tmpDir, { recursive: true });
+  const behaviorFilepath = path.join(tmpDir, filename);
 
   try {
     const res = await fetch(url, { dispatcher: getProxyDispatcher() });