diff --git a/app/src/main/java/jp/atled/agileworks/view/ui/documentweb/DocumentWebFragment.kt b/app/src/main/java/jp/atled/agileworks/view/ui/documentweb/DocumentWebFragment.kt
index d86da91619117eee77e8fd8169db475a0d770126..400d95d1caa1b6361f31f0b4c55e805e67dadc26 100644
--- a/app/src/main/java/jp/atled/agileworks/view/ui/documentweb/DocumentWebFragment.kt
+++ b/app/src/main/java/jp/atled/agileworks/view/ui/documentweb/DocumentWebFragment.kt
@@ -228,7 +228,9 @@ class DocumentWebFragment : Fragment(), DocumentWebPresenter {
             webSettings.useWideViewPort = true
             webSettings.domStorageEnabled = true
             webSettings.setSupportMultipleWindows(false)
-            webSettings.userAgentString += " AwMobileApp"
+            if (!webSettings.userAgentString.contains("AwMobileApp")) {
+                webSettings.userAgentString += " AwMobileApp"
+            }
             it.webViewClient = DocumentWebViewClient(webShare)
             it.webChromeClient = DocumentWebChromeClient(webShare)