diff --git a/lua/copilot/api.lua b/lua/copilot/api.lua
index b996fe4e..3c27f1e7 100644
--- a/lua/copilot/api.lua
+++ b/lua/copilot/api.lua
@@ -28,7 +28,12 @@ end
 ---@return boolean sent
 function mod.notify(client, method, params)
   logger.trace("api notify:", method, params)
-  return client.notify(method, params)
+
+  if vim.fn.has("nvim-0.11") == 1 then
+    return client:notify(method, params)
+  else
+    return client.notify(method, params)
+  end
 end
 
 ---@alias copilot_editor_info { name: string, version: string }
diff --git a/lua/copilot/panel.lua b/lua/copilot/panel.lua
index 085548c4..fc6f7537 100644
--- a/lua/copilot/panel.lua
+++ b/lua/copilot/panel.lua
@@ -469,7 +469,7 @@ function panel:refresh()
   else
     local utf16_index
     -- assume cursor at end of line
-    if vim.has("nvim-0.11") then
+    if vim.fn.has("nvim-0.11") == 1 then
       utf16_index = vim.str_utfindex(self.state.line, "utf-16")
     else
       ---@diagnostic disable-next-line: missing-parameter