diff --git a/Model/Entities/Entities.swift b/Model/Entities/Entities.swift
index 1dc04695..f996504b 100644
--- a/Model/Entities/Entities.swift
+++ b/Model/Entities/Entities.swift
@@ -146,6 +146,14 @@ struct URLContent {
     let start: UInt
     let end: UInt
     let size: UInt
+
+    var httpContentType: String {
+        if mime == "text/plain" {
+            return "text/plain;charset=UTf-8"
+        } else {
+            return mime
+        }
+    }
 }
 
 final class ZimFile: NSManagedObject, Identifiable {
diff --git a/Model/Utilities/WebKitHandler.swift b/Model/Utilities/WebKitHandler.swift
index b28c57e2..a431c8b6 100644
--- a/Model/Utilities/WebKitHandler.swift
+++ b/Model/Utilities/WebKitHandler.swift
@@ -76,7 +76,7 @@ final class KiwixURLSchemeHandler: NSObject, WKURLSchemeHandler {
     }
 
     private func sendHTTP200Response(_ urlSchemeTask: WKURLSchemeTask, url: URL, content: URLContent) {
-        let headers = ["Content-Type": content.mime, "Content-Length": "\(content.size)"]
+        let headers = ["Content-Type": content.httpContentType, "Content-Length": "\(content.size)"]
         if let response = HTTPURLResponse(url: url, statusCode: 200, httpVersion: "HTTP/1.1", headerFields: headers) {
             guard isStartedFor(urlSchemeTask.hash) else { return }
             urlSchemeTask.didReceive(response)