diff --git a/src/jrd/build_no.h b/src/jrd/build_no.h
index 33cb7e2ab4..b982aad699 100644
--- a/src/jrd/build_no.h
+++ b/src/jrd/build_no.h
@@ -3,16 +3,16 @@
                *** DO NOT EDIT ***
   TO CHANGE ANY INFORMATION IN HERE PLEASE
   EDIT src/misc/writeBuildNum.sh
-  FORMAL BUILD NUMBER:419
+  FORMAL BUILD NUMBER:421
 */
 
-#define PRODUCT_VER_STRING "6.0.0.419"
-#define FILE_VER_STRING "WI-T6.0.0.419"
-#define LICENSE_VER_STRING "WI-T6.0.0.419"
-#define FILE_VER_NUMBER 6, 0, 0, 419
+#define PRODUCT_VER_STRING "6.0.0.421"
+#define FILE_VER_STRING "WI-T6.0.0.421"
+#define LICENSE_VER_STRING "WI-T6.0.0.421"
+#define FILE_VER_NUMBER 6, 0, 0, 421
 #define FB_MAJOR_VER "6"
 #define FB_MINOR_VER "0"
 #define FB_REV_NO "0"
-#define FB_BUILD_NO "419"
+#define FB_BUILD_NO "421"
 #define FB_BUILD_TYPE "T"
 #define FB_BUILD_SUFFIX "Firebird 6.0 Initial"
diff --git a/src/misc/writeBuildNum.sh b/src/misc/writeBuildNum.sh
index aa7a123981..585dba85ec 100755
--- a/src/misc/writeBuildNum.sh
+++ b/src/misc/writeBuildNum.sh
@@ -9,7 +9,7 @@ BuildType=T
 MajorVer=6
 MinorVer=0
 RevNo=0
-BuildNum=419
+BuildNum=421
 
 NowAt=`pwd`
 cd `dirname $0`