diff --git a/adapters/vim/collab.vim b/adapters/vim/collab.vim
index 239e454..9ac7d4d 100644
--- a/adapters/vim/collab.vim
+++ b/adapters/vim/collab.vim
@@ -27,7 +27,7 @@ def Send(msg: dict<any>): void
 enddef
 
 def OnOutput(ch: channel, msg: string): void
-    if empty(msg)
+    if msg->empty()
         return
     endif
     var data: dict<any>
@@ -61,7 +61,7 @@ def ApplyRemoteContent(content: string): void
         return
     endif
     suppressing = true
-    var lines = split(content, "\n", true)
+    var lines = content->split("\n", true)
     var view = winsaveview()
     silent! :%delete _
     setline(1, lines)
@@ -74,7 +74,7 @@ def SendBuffer(): void
         return
     endif
     var lines = getline(1, '$')
-    var content = join(lines, "\n")
+    var content = lines->join("\n")
     Send({type: 'content', text: content})
 enddef