diff --git a/dynamic/client_test.go b/dynamic/client_test.go
index a205514d..979d7fe3 100644
--- a/dynamic/client_test.go
+++ b/dynamic/client_test.go
@@ -275,6 +275,11 @@ func TestDelete(t *testing.T) {
 				t.Errorf("Delete(%q) got path %s. wanted %s", tc.name, r.URL.Path, tc.path)
 			}
 
+			content := r.Header.Get("Content-Type")
+			if content != runtime.ContentTypeJSON {
+				t.Errorf("Delete(%q) got Content-Type %s. wanted %s", tc.name, content, runtime.ContentTypeJSON)
+			}
+
 			w.Header().Set("Content-Type", runtime.ContentTypeJSON)
 			unstructured.UnstructuredJSONScheme.Encode(statusOK, w)
 		})
@@ -323,6 +328,11 @@ func TestDeleteCollection(t *testing.T) {
 				t.Errorf("DeleteCollection(%q) got path %s. wanted %s", tc.name, r.URL.Path, tc.path)
 			}
 
+			content := r.Header.Get("Content-Type")
+			if content != runtime.ContentTypeJSON {
+				t.Errorf("DeleteCollection(%q) got Content-Type %s. wanted %s", tc.name, content, runtime.ContentTypeJSON)
+			}
+
 			w.Header().Set("Content-Type", runtime.ContentTypeJSON)
 			unstructured.UnstructuredJSONScheme.Encode(statusOK, w)
 		})
@@ -389,6 +399,11 @@ func TestCreate(t *testing.T) {
 				t.Errorf("Create(%q) got path %s. wanted %s", tc.name, r.URL.Path, tc.path)
 			}
 
+			content := r.Header.Get("Content-Type")
+			if content != runtime.ContentTypeJSON {
+				t.Errorf("Create(%q) got Content-Type %s. wanted %s", tc.name, content, runtime.ContentTypeJSON)
+			}
+
 			w.Header().Set("Content-Type", runtime.ContentTypeJSON)
 			data, err := ioutil.ReadAll(r.Body)
 			if err != nil {
@@ -466,6 +481,11 @@ func TestUpdate(t *testing.T) {
 				t.Errorf("Update(%q) got path %s. wanted %s", tc.name, r.URL.Path, tc.path)
 			}
 
+			content := r.Header.Get("Content-Type")
+			if content != runtime.ContentTypeJSON {
+				t.Errorf("Uppdate(%q) got Content-Type %s. wanted %s", tc.name, content, runtime.ContentTypeJSON)
+			}
+
 			w.Header().Set("Content-Type", runtime.ContentTypeJSON)
 			data, err := ioutil.ReadAll(r.Body)
 			if err != nil {
diff --git a/dynamic/simple.go b/dynamic/simple.go
index 9ae320d3..65f40fe1 100644
--- a/dynamic/simple.go
+++ b/dynamic/simple.go
@@ -110,6 +110,7 @@ func (c *dynamicResourceClient) Create(ctx context.Context, obj *unstructured.Un
 	result := c.client.client.
 		Post().
 		AbsPath(append(c.makeURLSegments(name), subresources...)...).
+		SetHeader("Content-Type", runtime.ContentTypeJSON).
 		Body(outBytes).
 		SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
 		Do(ctx)
@@ -145,6 +146,7 @@ func (c *dynamicResourceClient) Update(ctx context.Context, obj *unstructured.Un
 	result := c.client.client.
 		Put().
 		AbsPath(append(c.makeURLSegments(name), subresources...)...).
+		SetHeader("Content-Type", runtime.ContentTypeJSON).
 		Body(outBytes).
 		SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
 		Do(ctx)
@@ -181,6 +183,7 @@ func (c *dynamicResourceClient) UpdateStatus(ctx context.Context, obj *unstructu
 	result := c.client.client.
 		Put().
 		AbsPath(append(c.makeURLSegments(name), "status")...).
+		SetHeader("Content-Type", runtime.ContentTypeJSON).
 		Body(outBytes).
 		SpecificallyVersionedParams(&opts, dynamicParameterCodec, versionV1).
 		Do(ctx)
@@ -211,6 +214,7 @@ func (c *dynamicResourceClient) Delete(ctx context.Context, name string, opts me
 	result := c.client.client.
 		Delete().
 		AbsPath(append(c.makeURLSegments(name), subresources...)...).
+		SetHeader("Content-Type", runtime.ContentTypeJSON).
 		Body(deleteOptionsByte).
 		Do(ctx)
 	return result.Error()
@@ -225,6 +229,7 @@ func (c *dynamicResourceClient) DeleteCollection(ctx context.Context, opts metav
 	result := c.client.client.
 		Delete().
 		AbsPath(c.makeURLSegments("")...).
+		SetHeader("Content-Type", runtime.ContentTypeJSON).
 		Body(deleteOptionsByte).
 		SpecificallyVersionedParams(&listOptions, dynamicParameterCodec, versionV1).
 		Do(ctx)