diff --git a/tutor/templates/openapi.yaml b/tutor/templates/openapi.yaml
index 6b4c5b4..bb3d2c4 100644
--- a/tutor/templates/openapi.yaml
+++ b/tutor/templates/openapi.yaml
@@ -41,6 +41,8 @@ paths:
       parameters:
         - name: q
           in: query
+          schema:
+            type: string
           description: >-
             Text in the query string will be used to filter cards having that text in their
             name. Additionally, the keyword expressions below can be used to search for