diff --git a/plugin/wakatime.vim b/plugin/wakatime.vim
index e68caeb..61c9b6d 100644
--- a/plugin/wakatime.vim
+++ b/plugin/wakatime.vim
@@ -53,7 +53,7 @@ let s:VERSION = '7.1.2'
     let s:local_cache_expire = 10  " seconds between reading s:data_file
     let s:last_heartbeat = {'last_activity_at': 0, 'last_heartbeat_at': 0, 'file': ''}
     let s:heartbeats_buffer = []
-    let s:send_buffer_seconds = 10  " seconds between sending buffered heartbeats
+    let s:send_buffer_seconds = 30  " seconds between sending buffered heartbeats
     let s:last_sent = localtime()
     let s:has_async = has('patch-7.4-2344') && exists('*job_start')
     let s:nvim_async = exists('*jobstart')