diff --git a/hw/application_fpga/tools/b2s/b2s.go b/hw/application_fpga/tools/b2s/b2s.go
index bfd9afe..083a366 100644
--- a/hw/application_fpga/tools/b2s/b2s.go
+++ b/hw/application_fpga/tools/b2s/b2s.go
@@ -7,6 +7,7 @@ import (
 	"flag"
 	"fmt"
 	"os"
+	"path"
 
 	"golang.org/x/crypto/blake2s"
 )
@@ -16,8 +17,9 @@ func usage() {
 }
 
 func printCDigest(digest [blake2s.Size]byte, fileName string) {
-	fmt.Printf("// BLAKE2s digest of %v\n", fileName)
-	fmt.Printf("const uint8_t digest[32] = {\n")
+	fmt.Printf("#include <stdint.h>\n\n")
+	fmt.Printf("// BLAKE2s digest of %v\n", path.Base(fileName))
+	fmt.Printf("const uint8_t allowed_app_digest[32] = {\n")
 
 	for _, n := range digest {
 		fmt.Printf("0x%02x, ", n)
diff --git a/hw/application_fpga/tools/b2s/go.mod b/hw/application_fpga/tools/b2s/go.mod
index 5c98d9b..b328422 100644
--- a/hw/application_fpga/tools/b2s/go.mod
+++ b/hw/application_fpga/tools/b2s/go.mod
@@ -2,8 +2,6 @@ module b2s
 
 go 1.23.0
 
-toolchain go1.23.7
-
 require golang.org/x/crypto v0.36.0
 
 require golang.org/x/sys v0.31.0 // indirect