diff --git a/spec/domkm/silk/serve_spec.cljx b/spec/domkm/silk/serve_spec.cljx
index 2aab410..7650553 100644
--- a/spec/domkm/silk/serve_spec.cljx
+++ b/spec/domkm/silk/serve_spec.cljx
@@ -41,11 +41,14 @@
                   (-> @req
                       (@ring-handler)
                       :params
-                      (select-keys [:username :project])))
-    (spec/should= @req
+                      (select-keys [:username :project]))))
+   (spec/it
+    "won't override existing params in request"
+    (spec/should= "param"
                   (-> @req
+                      (assoc :params {:extra "param"})
                       (@ring-handler)
-                      (dissoc :params)))))
+                      (get-in [:params :extra])))))
   (spec/context
    "match and no `get-handler` provided"
    (spec/it
diff --git a/src/domkm/silk/serve.cljx b/src/domkm/silk/serve.cljx
index e560265..08516dc 100644
--- a/src/domkm/silk/serve.cljx
+++ b/src/domkm/silk/serve.cljx
@@ -34,7 +34,7 @@
      (fn [req]
        (if-let [params (silk/match rtes (request-map->URL req))]
          ((-> params :domkm.silk/name get-handler)
-          (assoc req :params params))
+          (update req :params merge params))
          ((get-handler nil) req))))))