diff --git a/alpha/Update_English.txt b/alpha/Update_English.txt
index ec3782e..51aa2c8 100644
--- a/alpha/Update_English.txt
+++ b/alpha/Update_English.txt
@@ -1,5 +1,16 @@
 Release note of v1.3.3 tree
 
+[ Changes from 1.3.3.0 to 1.3.3.1 ] (2023/10/23)
+
+PAR2 client update
+ Change
+  Max number of threads to read files on SSD was increased to 6.
+
+ Improvement
+  GPU acceleration may become faster slightly.
+
+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+
 [ Changes from 1.3.2.9 to 1.3.3.0 ] (2023/10/10)
 
 GUI update
diff --git a/alpha/par2j.exe b/alpha/par2j.exe
index 2866e1b..bf7c304 100644
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diff --git a/alpha/par2j64.exe b/alpha/par2j64.exe
index 46a2dca..9a027a4 100644
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