diff --git a/install/check-memcached-backend.sh b/install/check-memcached-backend.sh
index 72f580c456..25ef70dcbd 100644
--- a/install/check-memcached-backend.sh
+++ b/install/check-memcached-backend.sh
@@ -1,14 +1,15 @@
 echo "${_group}Checking memcached backend ..."
 
 if grep -q "\.PyMemcacheCache" "$SENTRY_CONFIG_PY"; then
-  echo "found PyMemcacheCache in $SENTRY_CONFIG_PY, looks good"
+  echo "PyMemcacheCache found in $SENTRY_CONFIG_PY, gonna assume you're good."
 else
   if grep -q "\.MemcachedCache" "$SENTRY_CONFIG_PY"; then
-    echo "found MemcachedCache in $SENTRY_CONFIG_PY, switching to PyMemcacheCache"
-    sed -i '' -e 's/\.MemcachedCache/.PyMemcacheCache/' "$SENTRY_CONFIG_PY"
-    sed -i '' -e 's/^\( *\)"server_max_value_length.*$/\1"ignore_exc": True,/' "$SENTRY_CONFIG_PY"
+    echo "MemcachedCache found in $SENTRY_CONFIG_PY, you should switch to PyMemcacheCache."
+    echo "See:"
+    echo "  https://develop.sentry.dev/self-hosted/releases/#breaking-changes"
+    exit 1
   else
-    echo 'weird setup, good luck'
+    echo 'Your setup looks weird. Good luck.'
   fi
 fi