diff --git a/CMakeLists.txt b/CMakeLists.txt
index ceb6d0b..57e01ac 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -2,7 +2,7 @@ cmake_minimum_required(VERSION 2.8.12)
 if (POLICY CMP0048)
   cmake_policy(SET CMP0048 NEW)
 endif (POLICY CMP0048)
-project(base16384 VERSION 2.2.2)
+project(base16384 VERSION 2.2.3)
 
 add_executable(base16384_b base16384.c)
 
diff --git a/base16384.c b/base16384.c
index 59bd4db..73e2ae0 100644
--- a/base16384.c
+++ b/base16384.c
@@ -39,7 +39,7 @@ unsigned long get_start_ms() {
 #endif
 
 static void print_usage() {
-	puts("Copyright (c) 2022 Fumiama Minamoto.\nBase16384 2.2.2 (Dec 14th 2022). Usage:");
+	puts("Copyright (c) 2022-2023 Fumiama Minamoto.\nBase16384 2.2.3 (May 18th 2023). Usage:");
 	puts("base16384 [-edt] [inputfile] [outputfile]");
 	puts("  -e\t\tencode");
 	puts("  -d\t\tdecode");