diff --git a/graphql-java-spring-webflux/src/main/java/graphql/spring/web/reactive/components/GraphQLController.java b/graphql-java-spring-webflux/src/main/java/graphql/spring/web/reactive/components/GraphQLController.java
index 552129f..306ef6a 100644
--- a/graphql-java-spring-webflux/src/main/java/graphql/spring/web/reactive/components/GraphQLController.java
+++ b/graphql-java-spring-webflux/src/main/java/graphql/spring/web/reactive/components/GraphQLController.java
@@ -62,7 +62,7 @@ public Object graphqlPOST(
         //   "variables": { "myVariable": "someValue", ... }
         // }
 
-        if (MediaType.APPLICATION_JSON_VALUE.equals(contentType)) {
+        if (contentType != null && contentType.startsWith(MediaType.APPLICATION_JSON_VALUE)) {
             GraphQLRequestBody request = jsonSerializer.deserialize(body, GraphQLRequestBody.class);
             if (request.getQuery() == null) {
                 request.setQuery("");
diff --git a/graphql-java-spring-webflux/src/test/java/graphql/spring/web/reactive/components/GraphQLControllerTest.java b/graphql-java-spring-webflux/src/test/java/graphql/spring/web/reactive/components/GraphQLControllerTest.java
index ea57695..4f482b7 100644
--- a/graphql-java-spring-webflux/src/test/java/graphql/spring/web/reactive/components/GraphQLControllerTest.java
+++ b/graphql-java-spring-webflux/src/test/java/graphql/spring/web/reactive/components/GraphQLControllerTest.java
@@ -64,7 +64,7 @@ public void testPostRequest() throws Exception {
         Mockito.when(graphql.executeAsync(captor.capture())).thenReturn(cf);
 
         client.post().uri("/graphql")
-                .contentType(MediaType.APPLICATION_JSON)
+                .contentType(MediaType.APPLICATION_JSON_UTF8)
                 .body(Mono.just(request), Map.class)
                 .accept(MediaType.APPLICATION_JSON_UTF8)
                 .exchange()
@@ -93,7 +93,7 @@ public void testSimplePostRequest() throws Exception {
         Mockito.when(graphql.executeAsync(captor.capture())).thenReturn(cf);
 
         client.post().uri("/graphql")
-                .contentType(MediaType.APPLICATION_JSON)
+                .contentType(MediaType.APPLICATION_JSON_UTF8)
                 .body(Mono.just(request), Map.class)
                 .accept(MediaType.APPLICATION_JSON_UTF8)
                 .exchange()
diff --git a/graphql-java-spring-webmvc/src/main/java/graphql/spring/web/servlet/components/GraphQLController.java b/graphql-java-spring-webmvc/src/main/java/graphql/spring/web/servlet/components/GraphQLController.java
index 9935b68..1ccd064 100644
--- a/graphql-java-spring-webmvc/src/main/java/graphql/spring/web/servlet/components/GraphQLController.java
+++ b/graphql-java-spring-webmvc/src/main/java/graphql/spring/web/servlet/components/GraphQLController.java
@@ -63,7 +63,7 @@ public Object graphqlPOST(
         //   "variables": { "myVariable": "someValue", ... }
         // }
 
-        if (MediaType.APPLICATION_JSON_VALUE.equals(contentType)) {
+        if (contentType != null && contentType.startsWith(MediaType.APPLICATION_JSON_VALUE)) {
             GraphQLRequestBody request = jsonSerializer.deserialize(body, GraphQLRequestBody.class);
             if (request.getQuery() == null) {
                 request.setQuery("");
diff --git a/graphql-java-spring-webmvc/src/test/java/graphql/spring/web/servlet/components/GraphQLControllerTest.java b/graphql-java-spring-webmvc/src/test/java/graphql/spring/web/servlet/components/GraphQLControllerTest.java
index 3594d8c..88a7e1f 100644
--- a/graphql-java-spring-webmvc/src/test/java/graphql/spring/web/servlet/components/GraphQLControllerTest.java
+++ b/graphql-java-spring-webmvc/src/test/java/graphql/spring/web/servlet/components/GraphQLControllerTest.java
@@ -86,7 +86,7 @@ public void testPostRequest() throws Exception {
 
         MvcResult mvcResult = this.mockMvc.perform(post("/graphql")
                 .content(toJson(request))
-                .contentType(MediaType.APPLICATION_JSON))
+                .contentType(MediaType.APPLICATION_JSON_UTF8))
                 .andExpect(status().isOk())
                 .andExpect(request().asyncStarted())
                 .andReturn();
@@ -121,7 +121,7 @@ public void testSimplePostRequest() throws Exception {
 
         MvcResult mvcResult = this.mockMvc.perform(post("/graphql")
                 .content(toJson(request))
-                .contentType(MediaType.APPLICATION_JSON))
+                .contentType(MediaType.APPLICATION_JSON_UTF8))
                 .andExpect(status().isOk())
                 .andExpect(request().asyncStarted())
                 .andReturn();