diff --git a/src/terminal.tsx b/src/terminal.tsx
index 6325466..4c3ea0f 100644
--- a/src/terminal.tsx
+++ b/src/terminal.tsx
@@ -33,7 +33,7 @@ const useTerminalResize = (terminalRef: React.RefObject<HTMLDivElement>, fitAddo
 
 function TerminalComponent(p: { websocket: string | null }) {
     const { websocket } = p;
-    const terminalRef = useRef<HTMLDivElement>(null);
+    const terminalRef = useRef<HTMLDivElement | null>(null);
     const terminal = useRef<Terminal | null>(null);
     const fitAddon = useRef<FitAddon | null>(null);
     const newWindow = useRef<Window | null>(null);