diff --git a/.changes/fix-expect.md b/.changes/fix-expect.md
new file mode 100644
index 000000000..4d7534559
--- /dev/null
+++ b/.changes/fix-expect.md
@@ -0,0 +1,6 @@
+---
+"wry": patch
+---
+
+Fix wkwebview crashed when received invalid UTF8 string from IPC. 
+
diff --git a/src/wkwebview/mod.rs b/src/wkwebview/mod.rs
index 68c9a4496..4003f030c 100644
--- a/src/wkwebview/mod.rs
+++ b/src/wkwebview/mod.rs
@@ -141,9 +141,11 @@ impl InnerWebView {
           let function = &mut *(*function as *mut Box<dyn Fn(String)>);
           let body: id = msg_send![msg, body];
           let utf8: *const c_char = msg_send![body, UTF8String];
-          let js = CStr::from_ptr(utf8).to_str().expect("Invalid UTF8 string");
-
-          (function)(js.to_string());
+          if let Ok(js) = CStr::from_ptr(utf8).to_str() {
+            (function)(js.to_string());
+          } else {
+            log::warn!("WebView received invalid UTF8 string from IPC.");
+          }
         } else {
           log::warn!("WebView instance is dropped! This handler shouldn't be called.");
         }