diff --git a/init.org b/init.org
index 6ccb82d..54deefc 100644
--- a/init.org
+++ b/init.org
@@ -492,7 +492,9 @@ Windows Theme:
   (setq org-src-window-setup 'current-window ;; C-c ' opens in current window
         org-src-fontify-natively t ;; use syntax highlighting in code blocks
         org-src-preserve-indentation t ;; no extra indentation
-        org-src-tab-acts-natively t))
+        org-src-tab-acts-natively t)
+
+  (setq org-log-done 'time))  ;; create timestamp when task is done
 #+END_SRC
 ** languages
    :PROPERTIES: