diff -r ee1caac29bb2 -r 496a37d816e9 thys/README
--- a/thys/README	Sun Feb 10 21:53:57 2019 +0000
+++ b/thys/README	Mon Feb 11 14:36:23 2019 +0000
@@ -4,7 +4,7 @@
  Lexer.thy
  Simplifying.thy
 
-The repository can be checked using Isabelle 2016.
+The repository can be checked using Isabelle 2017.
 
   isabelle build -c -v -d . Lex