diff --git a/CHANGELOG.md b/CHANGELOG.md
index d5fac61dc..72202a2b8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -40,6 +40,10 @@
 
 - S3: Add a new AWS S3 connector using the Security Token Service (STS) API Assume Role.
 
+### Fixed
+
+- Install scripts: fix mssql install scripts by forcing debian/11 deb repo
+
 ### [4.7.3] 2023-08-22
 
 ### Fixed
diff --git a/toucan_connectors/install_scripts/mssql.sh b/toucan_connectors/install_scripts/mssql.sh
index 08855b011..5add2fb78 100755
--- a/toucan_connectors/install_scripts/mssql.sh
+++ b/toucan_connectors/install_scripts/mssql.sh
@@ -9,9 +9,16 @@ fi
 apt-get update
 apt-get install -fyq gnupg curl
 curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add -
-source /etc/os-release &&\
+
+source /etc/os-release
+if [ "$ID" == "debian" ]; then
+    # debian/12 fails - fixing to debian/11 works:
+    curl "https://packages.microsoft.com/config/debian/11/prod.list" \
+        | tee /etc/apt/sources.list.d/mssql-release.list
+else
     curl "https://packages.microsoft.com/config/${ID}/${VERSION_ID}/prod.list" \
-    | tee /etc/apt/sources.list.d/mssql-release.list
+        | tee /etc/apt/sources.list.d/mssql-release.list
+fi
 apt-get update
 ACCEPT_EULA=Y apt-get -y install msodbcsql17 unixodbc-dev
 
diff --git a/toucan_connectors/install_scripts/mssql_TLSv1_0.sh b/toucan_connectors/install_scripts/mssql_TLSv1_0.sh
index 216790464..f33c36faa 100755
--- a/toucan_connectors/install_scripts/mssql_TLSv1_0.sh
+++ b/toucan_connectors/install_scripts/mssql_TLSv1_0.sh
@@ -21,9 +21,15 @@ fi
 apt-get update
 apt-get install -fyq gnupg curl
 curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add -
-source /etc/os-release &&\
+source /etc/os-release
+if [ "$ID" == "debian" ]; then
+    # debian/12 fails - fixing to debian/11 works:
+    curl "https://packages.microsoft.com/config/debian/11/prod.list" \
+        | tee /etc/apt/sources.list.d/mssql-release.list
+else
     curl "https://packages.microsoft.com/config/${ID}/${VERSION_ID}/prod.list" \
-    | tee /etc/apt/sources.list.d/mssql-release.list
+        | tee /etc/apt/sources.list.d/mssql-release.list
+fi
 apt-get update
 ACCEPT_EULA=Y apt-get -y install msodbcsql17 unixodbc-dev