diff --git a/Lib/idlelib/config-main.def b/Lib/idlelib/config-main.def
index 5ddd098..132797c 100644
--- a/Lib/idlelib/config-main.def
+++ b/Lib/idlelib/config-main.def
@@ -59,7 +59,7 @@
 encoding= none
 
 [FormatParagraph]
-paragraph=70
+paragraph=72
 
 [Indent]
 use-spaces= 1
diff --git a/Misc/NEWS b/Misc/NEWS
index 89167fb..8f424ff 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -289,7 +289,9 @@
 IDLE
 ----
 
-- Issue 21284: Paragraph reformat test passes after user changes reformat width.
+- Issue #21139: Change default paragraph width to 72, the PEP 8 recommendation.
+
+- Issue #21284: Paragraph reformat test passes after user changes reformat width.
 
 - Issue #20406: Use Python application icons for Idle window title bars.
   Patch mostly by Serhiy Storchaka.