diff --git a/files/update_mastodon.sh b/files/update_mastodon.sh
index 936c7b8..0115c68 100755
--- a/files/update_mastodon.sh
+++ b/files/update_mastodon.sh
@@ -97,6 +97,8 @@ if [ "${DEBUG}" == "true" ]; then
     echo "Changing to Mastodon's home directory '${mastodon_home}'..."
 fi
 cd "${mastodon_home}/live" || exit 3
+# shellcheck disable=SC1091
+source "${mastodon_home}/.profile"
 current_tag=$(git name-rev --name-only HEAD | awk 'BEGIN {FS="/"} {print($2)}')
 if [ "${current_tag}" != "${tag}" ] || [ "${reinstall}" ]; then
     if [ "${DEBUG}" == "true" ]; then
@@ -132,17 +134,17 @@ if [ "${current_tag}" != "${tag}" ] || [ "${reinstall}" ]; then
         echo "Running bundle install..."
     fi
     if [ "${dummy}" == "true" ]; then
-        echo sudo -u mastodon "${mastodon_home}/.rbenv/bin/bundle" install
+        echo sudo -u mastodon "${mastodon_home}/.rbenv/shims/bundle" install
     else
-        sudo -u mastodon "${mastodon_home}/.rbenv/bin/bundle" install
+        sudo -u mastodon "${mastodon_home}/.rbenv/shims/bundle" install
     fi
     if [ "${DEBUG}" == "true" ]; then
         echo "Running yarm install..."
     fi
     if [ "${dummy}" == "true" ]; then
-        echo sudo -u mastodon "${mastodon_home}/.rbenv/bin/yarn" install --frozen-lockfile
+        echo sudo -u mastodon "${mastodon_home}/live/bin/yarn" install --frozen-lockfile
     else
-        sudo -u mastodon "${mastodon_home}/.rbenv/bin/yarn" install --frozen-lockfile
+        sudo -u mastodon "${mastodon_home}/live/bin/yarn" install --frozen-lockfile
     fi
     if [ "${DEBUG}" == "true" ]; then
         echo "Restarting Mastodon services..."