Index: doc/bibliography/pl.bib
===================================================================
--- doc/bibliography/pl.bib	(revision 3d97b78af61b9bd6126e7c2c5dbd6dda7e46f328)
+++ doc/bibliography/pl.bib	(revision 507e7a25c43d01f94faa1f5f24b309ae36bd70d6)
@@ -6687,5 +6687,5 @@
     contributer	= {pabuhr@plg},
     author	= {{TIOBE Index}},
-    year	= {March 2017},
+    year	= {February 2018},
     url		= {http://www.tiobe.com/tiobe_index},
 }