diff --git a/openapi2kong/oas3_testfiles/13-request-validator-plugin.expected.json b/openapi2kong/oas3_testfiles/13-request-validator-plugin.expected.json
index 0896e8c..70e34c6 100644
--- a/openapi2kong/oas3_testfiles/13-request-validator-plugin.expected.json
+++ b/openapi2kong/oas3_testfiles/13-request-validator-plugin.expected.json
@@ -44,6 +44,89 @@
             "OAS3file_13-request-validator-plugin.yaml"
           ]
         },
+        {
+          "id": "ab63ee84-0324-5832-840a-d51118308654",
+          "methods": [
+            "POST"
+          ],
+          "name": "example_body-single-content-type-with-charset_post",
+          "paths": [
+            "~/body-single-content-type-with-charset$"
+          ],
+          "plugins": [
+            {
+              "config": {
+                "allowed_content_types": [
+                  "application/json; charset=UTF-8"
+                ],
+                "body_schema": "{\"$ref\":\"#/definitions/jsonSchema\",\"definitions\":{\"jsonSchema\":{\"properties\":{\"id\":{\"type\":\"integer\"},\"name\":{\"type\":\"string\"}},\"type\":\"object\"}}}",
+                "version": "draft4"
+              },
+              "id": "c7ee68c7-96e8-56ca-98f6-cbe44cf3c9ce",
+              "name": "request-validator",
+              "tags": [
+                "OAS3_import",
+                "OAS3file_13-request-validator-plugin.yaml"
+              ]
+            }
+          ],
+          "regex_priority": 200,
+          "strip_path": false,
+          "tags": [
+            "OAS3_import",
+            "OAS3file_13-request-validator-plugin.yaml"
+          ]
+        },
+        {
+          "id": "38af9752-0698-5a31-b825-90a83fee4225",
+          "methods": [
+            "POST"
+          ],
+          "name": "example_body-single-content-type-with-structured-syntax-suffix_post",
+          "paths": [
+            "~/body-single-content-type-with-structured-syntax-suffix$"
+          ],
+          "plugins": [
+            {
+              "config": {
+                "allowed_content_types": [
+                  "application/merge-patch+json"
+                ],
+                "body_schema": "{\"$ref\":\"#/definitions/jsonSchema\",\"definitions\":{\"jsonSchema\":{\"properties\":{\"id\":{\"type\":\"integer\"},\"name\":{\"type\":\"string\"}},\"type\":\"object\"}}}",
+                "version": "draft4"
+              },
+              "id": "fc80da5e-c48a-59c6-b879-ab8ff331746d",
+              "name": "request-validator",
+              "tags": [
+                "OAS3_import",
+                "OAS3file_13-request-validator-plugin.yaml"
+              ]
+            }
+          ],
+          "regex_priority": 200,
+          "strip_path": false,
+          "tags": [
+            "OAS3_import",
+            "OAS3file_13-request-validator-plugin.yaml"
+          ]
+        },
+        {
+          "id": "fea43c61-09c5-5baf-879f-8542b485f631",
+          "methods": [
+            "POST"
+          ],
+          "name": "example_body-single-content-xml_post",
+          "paths": [
+            "~/body-single-content-xml$"
+          ],
+          "plugins": [],
+          "regex_priority": 200,
+          "strip_path": false,
+          "tags": [
+            "OAS3_import",
+            "OAS3file_13-request-validator-plugin.yaml"
+          ]
+        },
         {
           "id": "6d59c2fe-e723-5238-a847-d87d8e8bb7fc",
           "methods": [
@@ -150,4 +233,4 @@
     }
   ],
   "upstreams": []
-}
\ No newline at end of file
+}
diff --git a/openapi2kong/oas3_testfiles/13-request-validator-plugin.yaml b/openapi2kong/oas3_testfiles/13-request-validator-plugin.yaml
index 669b58f..1fd7270 100644
--- a/openapi2kong/oas3_testfiles/13-request-validator-plugin.yaml
+++ b/openapi2kong/oas3_testfiles/13-request-validator-plugin.yaml
@@ -66,6 +66,38 @@ paths:
       responses:
         "200":
           description: OK
+  /body-single-content-xml:
+    post:
+      requestBody:
+        content:
+          application/xml:
+            schema:
+              $ref: '#/components/schemas/xmlSchema'
+      responses:
+        "200":
+          description: OK
+
+  /body-single-content-type-with-charset:
+    post:
+      requestBody:
+        content:
+          application/json; charset=UTF-8:
+            schema:
+              $ref: '#/components/schemas/jsonSchema'
+      responses:
+        "200":
+          description: OK
+
+  /body-single-content-type-with-structured-syntax-suffix:
+    post:
+      requestBody:
+        content:
+          application/merge-patch+json:
+            schema:
+              $ref: '#/components/schemas/jsonSchema'
+      responses:
+        "200":
+          description: OK
 
 components:
   schemas:
diff --git a/openapi2kong/validator.go b/openapi2kong/validator.go
index 0202995..8476007 100644
--- a/openapi2kong/validator.go
+++ b/openapi2kong/validator.go
@@ -2,6 +2,7 @@ package openapi2kong
 
 import (
 	"encoding/json"
+	"mime"
 	"sort"
 	"strings"
 
@@ -79,6 +80,15 @@ func generateParameterSchema(operation *openapi3.Operation, insoCompat bool) []m
 	return result
 }
 
+func parseMediaType(mediaType string) (string, string, error) {
+	parsedMediaType, _, err := mime.ParseMediaType(mediaType)
+	if err != nil {
+		return "", "", err
+	}
+	parts := strings.Split(parsedMediaType, "/")
+	return parts[0], parts[1], nil
+}
+
 // generateBodySchema returns the given schema if there is one, a generated
 // schema if it was specified, or "" if there is none.
 func generateBodySchema(operation *openapi3.Operation) string {
@@ -98,7 +108,12 @@ func generateBodySchema(operation *openapi3.Operation) string {
 	}
 
 	for contentType, content := range content {
-		if strings.Contains(strings.ToLower(contentType), "application/json") {
+		typ, subtype, err := parseMediaType(contentType)
+		if err != nil {
+			logbasics.Info("invalid MediaType '" + contentType + "' will be ignored")
+			return ""
+		}
+		if typ == "application" && (subtype == "json" || strings.HasSuffix(subtype, "+json")) {
 			return extractSchema((*content).Schema)
 		}
 	}