diff --git a/Makefile.debian b/Makefile.debian
index 72bac817a..c459ca36c 100644
--- a/Makefile.debian
+++ b/Makefile.debian
@@ -18,7 +18,7 @@ dotnet-debian.SENTINEL:
 	rm packages-microsoft-prod.deb
 	# install the sdk
 	sudo apt update
-	sudo apt install -y apt-transport-https &&  sudo apt update &&  sudo apt install -y dotnet-sdk-6.0
+	sudo apt install -y apt-transport-https &&  sudo apt update &&  sudo apt install -y dotnet-sdk-7.0
 	touch $@
 
 tests:
diff --git a/update.net_version.txt b/update.net_version.txt
index 9adc78767..cbb6d5b9c 100644
--- a/update.net_version.txt
+++ b/update.net_version.txt
@@ -1,3 +1,4 @@
 1. replace <TargetFramework>net6.0</TargetFramework> to <TargetFramework>net7.0</TargetFramework> in all *.csproj abd *.fsproj
 2. update regression scripts : "../asn1scc/bin/Debug/net6.0/asn1scc" to "../asn1scc/bin/Debug/net7.0/asn1scc" in all *.py under v4Tests and v4Tests-32
 3. update Dockerfile and Dockerfile.runtime
+4. update Makefile.debian