diff --git a/NEWS b/NEWS
index 00f8696c..bb1160a6 100644
--- a/NEWS
+++ b/NEWS
@@ -2,7 +2,7 @@
 User visible changes for UPX
 ==================================================================
 
-Changes in 4.0.0 (XX XXX 2021):
+Changes in 4.0.0 (30 Sep 2022):
   * Switch to semantic versioning
   * SECURITY NOTES: emphasize the security context in the docs
   * Add support for EFI files (PE x86; Kornel Pal)
diff --git a/src/version.h b/src/version.h
index 84b349d9..9f52521f 100644
--- a/src/version.h
+++ b/src/version.h
@@ -1,8 +1,8 @@
 #define UPX_VERSION_HEX         0x040000        /* 04.00.00 */
 #define UPX_VERSION_STRING      "4.0.0"
 #define UPX_VERSION_STRING4     "4.00"
-#define UPX_VERSION_DATE        "Jan 1st 2021"
-#define UPX_VERSION_DATE_ISO    "2021-01-01"
-#define UPX_VERSION_YEAR        "2021"
+#define UPX_VERSION_DATE        "Sep 30th 2022"
+#define UPX_VERSION_DATE_ISO    "2022-09-30"
+#define UPX_VERSION_YEAR        "2022"
 
 /* vim:set ts=4 sw=4 et: */