diff --git a/MVMCoreUI/Atomic/Atoms/Views/WebView.swift b/MVMCoreUI/Atomic/Atoms/Views/WebView.swift
index 1ce2b123..3de42935 100644
--- a/MVMCoreUI/Atomic/Atoms/Views/WebView.swift
+++ b/MVMCoreUI/Atomic/Atoms/Views/WebView.swift
@@ -128,7 +128,9 @@ extension WebView : WKUIDelegate {
         if !dynamicHeight {
             return
         }
-        /*  was using "document.readyState" to check the state, while       evaluateJavaScript "document.readyState",only works when webview contains userscrpt.otherwise, it would return WKErrorDomain Code=4 "A JavaScript exception occurred".
+        /*
+            was using "document.readyState" to check the state,
+            while evaluateJavaScript "document.readyState",only works when webview contains userscrpt.otherwise, it would return WKErrorDomain Code=4 "A JavaScript exception occurred".
             so webView.isLoading to check load finished state
         */
         if !webView.isLoading {
@@ -136,14 +138,18 @@ extension WebView : WKUIDelegate {
                 guard let self = self else {
                     return
                 }
-                if let height = result as? CGFloat {
-                    self.webViewHeight?.constant = height
-                } else {
-                    //if failed to get height from javascript, using scrollview.contensize's height
-                    let scrollHeight = self.webView?.scrollView.contentSize.height
-                    self.webViewHeight?.constant = scrollHeight ?? 44
-                }
-                self.delegateObject?.moleculeDelegate?.moleculeLayoutUpdated(self)
+                MVMCoreDispatchUtility.performBlock(onMainThread: { [weak self] in
+                    guard let self = self else {
+                        return
+                    }
+                    if let height = result as? CGFloat {
+                        self.webViewHeight?.constant = height
+                    } else {
+                        //if failed to get height from javascript, using scrollview.contensize's height
+                        self.webViewHeight?.constant = webView.scrollView.contentSize.height
+                    }
+                    self.delegateObject?.moleculeDelegate?.moleculeLayoutUpdated(self)
+                })
             })
         }
     }