diff --git a/modules/reitit-core/src/reitit/coercion.cljc b/modules/reitit-core/src/reitit/coercion.cljc
index f6075ae9..969069ce 100644
--- a/modules/reitit-core/src/reitit/coercion.cljc
+++ b/modules/reitit-core/src/reitit/coercion.cljc
@@ -167,6 +167,12 @@
 ;; api-docs
 ;;
 
+(defn -warn-unsupported-coercions [{:keys [parameters responses] :as data}]
+  (when (:request parameters)
+    (println "WARNING [reitit.coercion]: swagger apidocs don't support :request coercion"))
+  (when (some :content (vals responses))
+    (println "WARNING [reitit.coercion]: swagger apidocs don't support :responses :content coercion")))
+
 (defn get-apidocs [coercion specification data]
   (let [swagger-parameter {:query :query
                            :body :body
@@ -176,15 +182,17 @@
                            :multipart :formData}]
     (case specification
       :openapi (-get-apidocs coercion specification data)
-      :swagger (->> (update
-                     data
-                     :parameters
-                     (fn [parameters]
-                       (->> parameters
-                            (map (fn [[k v]] [(swagger-parameter k) v]))
-                            (filter first)
-                            (into {}))))
-                    (-get-apidocs coercion specification)))))
+      :swagger (do
+                 (-warn-unsupported-coercions data)
+                 (->> (update
+                       data
+                       :parameters
+                       (fn [parameters]
+                         (->> parameters
+                              (map (fn [[k v]] [(swagger-parameter k) v]))
+                              (filter first)
+                              (into {}))))
+                      (-get-apidocs coercion specification))))))
 
 
 ;;
diff --git a/test/cljc/reitit/swagger_test.clj b/test/cljc/reitit/swagger_test.clj
index 0958b8b1..542b7ebd 100644
--- a/test/cljc/reitit/swagger_test.clj
+++ b/test/cljc/reitit/swagger_test.clj
@@ -384,3 +384,29 @@
         spec (:body (app {:request-method :get, :uri "/swagger.json"}))]
     (is (= ["query" "body" "formData" "header" "path"]
            (map :in (get-in spec [:paths "/parameters" :post :parameters]))))))
+
+(deftest multiple-content-types-test
+  (testing ":request coercion"
+    (let [app (ring/ring-handler
+               (ring/router
+                [["/parameters"
+                  {:post {:coercion spec/coercion
+                          :parameters {:request {:content {"application/json" {:x string?}}}}
+                          :handler identity}}]
+                 ["/swagger.json"
+                  {:get {:no-doc true
+                         :handler (swagger/create-swagger-handler)}}]]))
+          output (with-out-str (app {:request-method :get, :uri "/swagger.json"}))]
+      (is (.contains output "WARN"))))
+  (testing "multiple response content types"
+    (let [app (ring/ring-handler
+               (ring/router
+                [["/parameters"
+                  {:post {:coercion spec/coercion
+                          :responses {200 {:content {"application/json" {:r string?}}}}
+                          :handler identity}}]
+                 ["/swagger.json"
+                  {:get {:no-doc true
+                         :handler (swagger/create-swagger-handler)}}]]))
+          output (with-out-str (app {:request-method :get, :uri "/swagger.json"}))]
+      (is (.contains output "WARN")))))