diff --git a/pages/students/2018/martin_wencel/README.md b/pages/students/2018/martin_wencel/README.md
index 9c2e5d519..9e2c1b993 100644
--- a/pages/students/2018/martin_wencel/README.md
+++ b/pages/students/2018/martin_wencel/README.md
@@ -2,7 +2,7 @@
 title: Martin Wencel
 published: true
 taxonomy:
-    category: [2018,bp2021]
+    category: [bp2021]
     tag: [demo,nlp]
     author: Daniel Hladek
 ---
diff --git a/pages/students/2018/oleh_bilykh/README.md b/pages/students/2018/oleh_bilykh/README.md
index 708f35e08..cd1fb6a50 100644
--- a/pages/students/2018/oleh_bilykh/README.md
+++ b/pages/students/2018/oleh_bilykh/README.md
@@ -2,7 +2,7 @@
 title: Oleh Bilykh
 published: true
 taxonomy:
-    category: [2018,bp2021]
+    category: [bp2021]
     tag: [demo,nlp]
     author: Daniel Hladek
 ---
diff --git a/pages/students/2018/ondrej_megela/README.md b/pages/students/2018/ondrej_megela/README.md
index 04ba87378..1653e8941 100644
--- a/pages/students/2018/ondrej_megela/README.md
+++ b/pages/students/2018/ondrej_megela/README.md
@@ -2,7 +2,7 @@
 title: Ondrej Megela 
 published: true
 taxonomy:
-    category: [2018,bp2021]
+    category: [bp2021]
     tag: [nlp]
     author: Daniel Hladek
 ---
@@ -41,4 +41,4 @@ https://git.kemt.fei.tuke.sk/KEMT/zpwiki/src/branch/master/pages/topics
 
 - python
 - nlp
-- seq2seq
\ No newline at end of file
+- seq2seq
diff --git a/pages/students/2018/samuel_sirotnik/README.md b/pages/students/2018/samuel_sirotnik/README.md
index 3f569ade0..68bf7da8e 100644
--- a/pages/students/2018/samuel_sirotnik/README.md
+++ b/pages/students/2018/samuel_sirotnik/README.md
@@ -3,7 +3,7 @@ title: Samuel Širotník
 published: true
 date: 01-02-2014
 taxonomy:
-    category: [2018,bp2021]
+    category: [bp2021]
     tag: [raspberrypi,cloud]
     author: Daniel Hladek
 ---