diff --git a/modules/reitit-interceptors/src/reitit/http/interceptors/multipart.clj b/modules/reitit-interceptors/src/reitit/http/interceptors/multipart.clj
index d616c689..4a2d4ba1 100644
--- a/modules/reitit-interceptors/src/reitit/http/interceptors/multipart.clj
+++ b/modules/reitit-interceptors/src/reitit/http/interceptors/multipart.clj
@@ -19,13 +19,17 @@
   "Spec for file param created by ring.middleware.multipart-params.temp-file store."
   (st/spec
    {:spec (s/keys :req-un [::filename ::content-type ::tempfile ::size])
-    :swagger/type "file"}))
+    :swagger/type "file"
+    :openapi {:type "string"
+              :format "binary"}}))
 
 (def bytes-part
   "Spec for file param created by ring.middleware.multipart-params.byte-array store."
   (st/spec
    {:spec (s/keys :req-un [::filename ::content-type ::bytes])
-    :swagger/type "file"}))
+    :swagger/type "file"
+    :openapi {:type "string"
+              :format "binary"}}))
 
 (defn- coerced-request [request coercers]
   (if-let [coerced (if coercers (coercion/coerce-request coercers request))]
diff --git a/modules/reitit-spec/src/reitit/coercion/spec.cljc b/modules/reitit-spec/src/reitit/coercion/spec.cljc
index d453dd61..d5edd78b 100644
--- a/modules/reitit-spec/src/reitit/coercion/spec.cljc
+++ b/modules/reitit-spec/src/reitit/coercion/spec.cljc
@@ -108,7 +108,7 @@
                                 (update $ :schema #(coercion/-compile-model this % nil))
                                 $))]))})))
         :openapi (merge
-                  (when (seq (dissoc parameters :body :request))
+                  (when (seq (dissoc parameters :body :request :multipart))
                     (openapi/openapi-spec {::openapi/parameters
                                            (into (empty parameters)
                                                  (for [[k v] (dissoc parameters :body :request)]
@@ -124,6 +124,12 @@
                                                        (into {}
                                                              (for [[format model] (:content (:request parameters))]
                                                                [format (coercion/-compile-model this model nil)])))})})
+                  (when (:multipart parameters)
+                       {:requestBody
+                        (openapi/openapi-spec
+                         {::openapi/content
+                          {"multipart/form-data"
+                           (coercion/-compile-model this (:multipart parameters) nil)}})})
                   (when responses
                     {:responses
                      (into
diff --git a/test/cljc/reitit/openapi_test.clj b/test/cljc/reitit/openapi_test.clj
index 3db5533f..0216ac8e 100644
--- a/test/cljc/reitit/openapi_test.clj
+++ b/test/cljc/reitit/openapi_test.clj
@@ -8,6 +8,7 @@
             [reitit.coercion.malli :as malli]
             [reitit.coercion.schema :as schema]
             [reitit.coercion.spec :as spec]
+            [reitit.http.interceptors.multipart]
             [reitit.openapi :as openapi]
             [reitit.ring :as ring]
             [reitit.ring.spec]
@@ -429,6 +430,39 @@
         (testing "spec is valid"
           (is (nil? (validate spec))))))))
 
+(deftest multipart-test
+  (doseq [[coercion file-schema]
+          [#_[#'malli/coercion (fn [nom] [:map [nom :string]])]
+           #_[#'schema/coercion (fn [nom] {nom s/Str})]
+           [#'spec/coercion reitit.http.interceptors.multipart/bytes-part]]]
+    (testing coercion
+      (let [app (ring/ring-handler
+                 (ring/router
+                  [["/upload"
+                    {:post {:decription "upload"
+                            :coercion @coercion
+                            :parameters {:multipart {:file file-schema}}
+                            :handler identity}}]
+                   ["/openapi.json"
+                    {:get {:handler (openapi/create-openapi-handler)
+                           :openapi {:info {:title "" :version "0.0.1"}}
+                           :no-doc true}}]]
+                  {:data {:middleware [openapi/openapi-feature]}}))
+            spec (-> {:request-method :get
+                      :uri "/openapi.json"}
+                     app
+                     :body)]
+        (testing "multipart body"
+          (is (= {:requestBody {:content {"multipart/form-data" {:schema {:type "object"
+                                                                          :properties {"file" {:type "string"
+                                                                                               :format "binary"}}
+                                                                          :required ["file"]}}}}}
+                 (-> spec
+                     (get-in [:paths "/upload" :post])
+                     #_normalize))))
+        (testing "spec is valid"
+          (is (nil? (validate spec))))))))
+
 (deftest per-content-type-test
   (doseq [[coercion ->schema]
           [[#'malli/coercion (fn [nom] [:map [nom :string]])]