diff --git a/nontech/memorials/music/chaikovskiy.txt b/nontech/memorials/music/chaikovskiy.txt
index 951d99ab5..ee001fdd4 100644
--- a/nontech/memorials/music/chaikovskiy.txt
+++ b/nontech/memorials/music/chaikovskiy.txt
@@ -1,3 +1,3 @@
 2024
-Aganov - Obolenskiy - Chaikovskiy 58:00 of 1:46:52
+Aganov - Obolenskiy - Chaikovskiy 1:27:00 of 1:46:52
     https://www.youtube.com/watch?v=zwDLzx3S3F4
diff --git a/pl/java/features/io/nio.txt b/pl/java/features/io/nio.txt
new file mode 100644
index 000000000..d0b1d4864
--- /dev/null
+++ b/pl/java/features/io/nio.txt
@@ -0,0 +1,3 @@
+2025
+Otus - Rudnov - NIO2 intro 5:00 of 1:37:09
+    https://www.youtube.com/watch?v=apDCLGEcRB8
diff --git a/pl/java/libfws/io/formats/json/jackson/features/pretty-print.txt b/pl/java/libfws/io/formats/json/jackson/features/pretty-print.txt
index c7205273d..863b712e2 100644
--- a/pl/java/libfws/io/formats/json/jackson/features/pretty-print.txt
+++ b/pl/java/libfws/io/formats/json/jackson/features/pretty-print.txt
@@ -1,4 +1,5 @@
 https://stackoverflow.com/questions/14515994/convert-json-string-to-pretty-print-json-output-using-jackson
 mapper.withDefaultPrettyPrintingWriter().writeValueAsString(jsonString)
+writerWithDefaultPrettyPrinter()
 
 objectMapper.setSerializationInclusion(JsonInclude.Include.NON_NULL);