diff --git a/static/js/chat.js b/static/js/chat.js
index 7727243..1aae6ca 100644
--- a/static/js/chat.js
+++ b/static/js/chat.js
@@ -1549,7 +1549,7 @@
 	$upload.addEventListener("click", async () => {
 		const files = await selectFile(
 			// the ultimate list
-			".adoc,.bash,.bashrc,.bat,.c,.cc,.cfg,.cjs,.cmd,.conf,.cpp,.cs,.css,.csv,.cxx,.dockerfile,.dockerignore,.editorconfig,.env,.fish,.fs,.fsx,.gitattributes,.gitignore,.go,.gradle,.groovy,.h,.hh,.hpp,.htm,.html,.ini,.ipynb,.java,.jl,.js,.json,.jsonc,.jsx,.kt,.kts,.less,.log,.lua,.m,.makefile,.markdown,.md,.mjs,.mk,.mm,.php,.phtml,.pl,.pm,.profile,.properties,.ps1,.psql,.py,.pyw,.r,.rb,.rs,.rst,.sass,.scala,.scss,.sh,.sql,.svelte,.swift,.t,.toml,.ts,.tsv,.tsx,.txt,.vb,.vue,.xhtml,.xml,.xsd,.xsl,.xslt,.yaml,.yml,.zig,.zsh",
+			"text/*",
 			true,
 			file => {
 				if (!file.name) {
@@ -1558,10 +1558,10 @@
 					throw new Error("File name too long (max 512 characters)");
 				}
 
-				if (typeof file.content !== "string") {
-					throw new Error("File is not a text file");
-				} else if (!file.content) {
+				if (!file.content) {
 					throw new Error("File is empty");
+				} else if (file.content.includes("\0")) {
+					throw new Error("File is not a text file");
 				} else if (file.content.length > 4 * 1024 * 1024) {
 					throw new Error("File is too big (max 4MB)");
 				}