diff --git a/src/jrd/build_no.h b/src/jrd/build_no.h
index 8c933b09c4..2b5bffc8ad 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:852
+  FORMAL BUILD NUMBER:853
 */
 
-#define PRODUCT_VER_STRING "4.0.0.852"
-#define FILE_VER_STRING "WI-T4.0.0.852"
-#define LICENSE_VER_STRING "WI-T4.0.0.852"
-#define FILE_VER_NUMBER 4, 0, 0, 852
+#define PRODUCT_VER_STRING "4.0.0.853"
+#define FILE_VER_STRING "WI-T4.0.0.853"
+#define LICENSE_VER_STRING "WI-T4.0.0.853"
+#define FILE_VER_NUMBER 4, 0, 0, 853
 #define FB_MAJOR_VER "4"
 #define FB_MINOR_VER "0"
 #define FB_REV_NO "0"
-#define FB_BUILD_NO "852"
+#define FB_BUILD_NO "853"
 #define FB_BUILD_TYPE "T"
 #define FB_BUILD_SUFFIX "Firebird 4.0 Alpha 1"
diff --git a/src/misc/writeBuildNum.sh b/src/misc/writeBuildNum.sh
index 276abbe731..aaae3668a8 100755
--- a/src/misc/writeBuildNum.sh
+++ b/src/misc/writeBuildNum.sh
@@ -9,7 +9,7 @@ BuildType=T
 MajorVer=4
 MinorVer=0
 RevNo=0
-BuildNum=852
+BuildNum=853
 
 NowAt=`pwd`
 cd `dirname $0`