diff --git a/.gitmodules b/.gitmodules
index 956fea5..eef3643 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -47,7 +47,7 @@
 [submodule "libraries/mysqlconnector"]
 	path = libraries/mysqlconnector
 	url = https://github.com/mysql/mysql-connector-cpp.git
-	branch = 8.0.12
+	checkout = 8.0.12
 [submodule "libraries/boringssl"]
 	path = libraries/boringssl
 	url = https://boringssl.googlesource.com/boringssl
diff --git a/attach_modules.sh b/attach_modules.sh
index b4826fd..b11accc 100755
--- a/attach_modules.sh
+++ b/attach_modules.sh
@@ -9,3 +9,13 @@ fi
 git checkout ${BRANCH};
 echo "git pull origin ${BRANCH}"
 git pull origin ${BRANCH}'
+
+git submodule foreach -q --recursive '
+echo "Updating $name";
+CHECKOUT=$(git config -f $toplevel/.gitmodules submodule.$name.checkout)
+if [ ! -z ${CHECKOUT} ]; then
+	git checkout ${CHECKOUT};
+	echo "Checking out ${CHECKOUT} for $name"
+fi
+'
+