diff --git a/launcher-impl/microprofile/openapi/pom.xml b/launcher-impl/microprofile/openapi/pom.xml
index 4a4e243..10dfbb3 100644
--- a/launcher-impl/microprofile/openapi/pom.xml
+++ b/launcher-impl/microprofile/openapi/pom.xml
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
-    Copyright (c) 2019 Fujitsu Limited and/or its affiliates. All rights reserved.
+    Copyright (c) 2019-2021 Fujitsu Limited and/or its affiliates. All rights reserved.
 
     This program and the accompanying materials are made available under the
     terms of the Eclipse Public License v. 2.0, which is available at
@@ -30,7 +30,36 @@
         </dependency>
         <dependency>
             <groupId>io.smallrye</groupId>
-            <artifactId>smallrye-open-api-1.1</artifactId>
+            <artifactId>smallrye-open-api-core</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>io.smallrye</groupId>
+            <artifactId>smallrye-open-api-jaxrs</artifactId>
+        </dependency>
+        <!-- Unit Test -->
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <version>5.8.1</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
+            <version>5.8.1</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-params</artifactId>
+            <version>5.8.1</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.mockito</groupId>
+            <artifactId>mockito-core</artifactId>
+            <version>4.0.0</version>
+            <scope>test</scope>
         </dependency>
     </dependencies>
 
@@ -47,6 +76,11 @@
                     </execution>
                 </executions>
             </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>3.0.0-M5</version>
+            </plugin>
         </plugins>
     </build>
 </project>
diff --git a/launcher-impl/microprofile/openapi/src/main/java/com/fujitsu/launcher/microprofile/openapi/OpenApiService.java b/launcher-impl/microprofile/openapi/src/main/java/com/fujitsu/launcher/microprofile/openapi/OpenApiService.java
index 59f4fdb..61b3fa5 100644
--- a/launcher-impl/microprofile/openapi/src/main/java/com/fujitsu/launcher/microprofile/openapi/OpenApiService.java
+++ b/launcher-impl/microprofile/openapi/src/main/java/com/fujitsu/launcher/microprofile/openapi/OpenApiService.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019 Fujitsu Limited and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019-2021 Fujitsu Limited and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0, which is available at
@@ -17,6 +17,7 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.Set;
+import java.util.regex.Pattern;
 
 import javax.inject.Inject;
 
@@ -39,7 +40,7 @@
 import io.smallrye.openapi.api.OpenApiDocument;
 import io.smallrye.openapi.runtime.OpenApiProcessor;
 import io.smallrye.openapi.runtime.OpenApiStaticFile;
-import io.smallrye.openapi.runtime.io.OpenApiSerializer.Format;
+import io.smallrye.openapi.runtime.io.Format;
 /**
  *
  * @author Katsuhiro Kunisada
@@ -166,10 +167,10 @@ private boolean isJarToBeScanned(OpenApiConfig config, String entry) {
     }
 
     private boolean isClassToBeScanned(OpenApiConfig config, String entry) {
-        Set<String> scanClasses = config.scanClasses();
-        Set<String> scanPackages = config.scanPackages();
-        Set<String> scanExcludeClasses = config.scanExcludeClasses();
-        Set<String> scanExcludePackages = config.scanExcludePackages();
+        Pattern scanClasses = config.scanClasses();
+        Pattern scanPackages = config.scanPackages();
+        Pattern scanExcludeClasses = config.scanExcludeClasses();
+        Pattern scanExcludePackages = config.scanExcludePackages();
 
         if (entry == null) {
             return false;
@@ -179,16 +180,16 @@ private boolean isClassToBeScanned(OpenApiConfig config, String entry) {
         String packageName = getPackageName(fqcn);
         boolean ret;
 
-        if (scanClasses.isEmpty() && scanPackages.isEmpty()) {
+        if (scanClasses.pattern().isEmpty() && scanPackages.pattern().isEmpty()) {
             ret = true;
-        } else if (!scanClasses.isEmpty() && scanPackages.isEmpty()) {
-            ret = scanClasses.contains(fqcn);
-        } else if (scanClasses.isEmpty() && !scanPackages.isEmpty()) {
-            ret = scanPackages.contains(packageName);
+        } else if (!scanClasses.pattern().isEmpty() && scanPackages.pattern().isEmpty()) {
+            ret = scanClasses.matcher(fqcn).matches();
+        } else if (scanClasses.pattern().isEmpty() && !scanPackages.pattern().isEmpty()) {
+            ret = scanPackages.matcher(packageName).matches();
         } else {
-            ret = scanClasses.contains(fqcn) || scanPackages.contains(packageName);
+            ret = scanClasses.matcher(fqcn).matches() || scanPackages.matcher(packageName).matches();
         }
-        if (scanExcludeClasses.contains(fqcn) || scanExcludePackages.contains(packageName)) {
+        if (scanExcludeClasses.matcher(fqcn).matches() || scanExcludePackages.matcher(packageName).matches()) {
             ret = false;
         }
         return ret;
diff --git a/launcher-impl/microprofile/openapi/src/main/java/com/fujitsu/launcher/microprofile/openapi/OpenApiServlet.java b/launcher-impl/microprofile/openapi/src/main/java/com/fujitsu/launcher/microprofile/openapi/OpenApiServlet.java
index fafa20c..7d24f99 100644
--- a/launcher-impl/microprofile/openapi/src/main/java/com/fujitsu/launcher/microprofile/openapi/OpenApiServlet.java
+++ b/launcher-impl/microprofile/openapi/src/main/java/com/fujitsu/launcher/microprofile/openapi/OpenApiServlet.java
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019 Fujitsu Limited and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019-2021 Fujitsu Limited and/or its affiliates. All rights reserved.
  *
  * This program and the accompanying materials are made available under the
  * terms of the Eclipse Public License v. 2.0, which is available at
@@ -10,6 +10,9 @@
 package com.fujitsu.launcher.microprofile.openapi;
 
 import java.io.IOException;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
 
 import javax.servlet.annotation.WebServlet;
 import javax.servlet.http.HttpServlet;
@@ -17,45 +20,81 @@
 import javax.servlet.http.HttpServletResponse;
 
 import io.smallrye.openapi.api.OpenApiDocument;
+import io.smallrye.openapi.runtime.io.Format;
 import io.smallrye.openapi.runtime.io.OpenApiSerializer;
-import io.smallrye.openapi.runtime.io.OpenApiSerializer.Format;
+
+import org.glassfish.jersey.message.internal.AcceptableMediaType;
+import org.glassfish.jersey.message.internal.HttpHeaderReader;
+
+import java.text.ParseException;
+
+import javax.ws.rs.core.MediaType;
 
 /**
  * 
  * @author Takahiro Nagao
  * @author Katsuhiro Kunisada
+ * @author Koki Kosaka
  */
 @SuppressWarnings("serial")
 @WebServlet
 public class OpenApiServlet extends HttpServlet {
-    public static final String MEDIA_TYPE_YAML = "text/plain";
-    public static final String MEDIA_TYPE_JSON = "application/json";
+    public static final Map<Format, String> ACCEPTED_TYPES = new HashMap<>();
+
+    static {
+        ACCEPTED_TYPES.put(Format.YAML, MediaType.TEXT_PLAIN);
+        ACCEPTED_TYPES.put(Format.JSON, MediaType.APPLICATION_JSON);
+    }
 
     @Override
     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException {
-        Format format = Format.YAML;
-        String type = MEDIA_TYPE_YAML;
+        Format format = getResponseFormat(request);
+        if (format != null) {
+            String oai = OpenApiSerializer.serialize(OpenApiDocument.INSTANCE.get(), format);
+            response.setContentType(ACCEPTED_TYPES.get(format));
+            response.getWriter().write(oai);
+            response.setStatus(HttpServletResponse.SC_OK);
+        } else {
+            response.sendError(HttpServletResponse.SC_NOT_ACCEPTABLE);
+        }
+    }
 
-        if (isJson(request)) {
-            format = Format.JSON;
-            type = MEDIA_TYPE_JSON;
+    protected Format getResponseFormat(HttpServletRequest request) {
+        try {
+            Format format = parseFormatQueryParameter(request);
+            if (format != null) return format;
+            return parseAcceptHeader(request);
+        } catch (ParseException e) {
+            throw new RuntimeException(e);
         }
+    }
 
-        String oai = OpenApiSerializer.serialize(OpenApiDocument.INSTANCE.get(), format);
-        response.getWriter().write(oai);
-        response.setContentType(type);
-        response.setStatus(200);
+    private Format parseFormatQueryParameter(HttpServletRequest request) {
+        String formatParam = request.getParameter("format");
+        if (formatParam != null) {
+            for (Format f : Format.values()) {
+                if (f.name().equalsIgnoreCase(formatParam)) return f;
+            }
+        }
+        return null;
     }
 
-    private boolean isJson(HttpServletRequest request) {
-        String accept = request.getHeader("Accept");
-        if (accept != null && accept.equals(MEDIA_TYPE_JSON)) {
-            return true;
+    private Format parseAcceptHeader(HttpServletRequest request) throws ParseException {
+        String acceptHeader = request.getHeader("Accept");
+        // sorted by quality value
+        List<AcceptableMediaType> mediaTypes = HttpHeaderReader.readAcceptMediaType(acceptHeader);
+        if (mediaTypes.isEmpty()) {
+            mediaTypes.add(AcceptableMediaType.valueOf(MediaType.WILDCARD_TYPE));
         }
-        String formatParam = request.getParameter("format");
-        if (formatParam != null && formatParam.equals("json")) {
-            return true;
+
+        for (AcceptableMediaType mediaType : mediaTypes) {
+            if (mediaType.isCompatible(MediaType.TEXT_PLAIN_TYPE)) {
+                return Format.YAML;
+            }
+            if (mediaType.isCompatible(MediaType.APPLICATION_JSON_TYPE)) {
+                return Format.JSON;
+            }
         }
-        return false;
+        return null;
     }
 }
diff --git a/launcher-impl/microprofile/openapi/src/test/java/com/fujitsu/launcher/microprofile/openapi/OpenApiServletTest.java b/launcher-impl/microprofile/openapi/src/test/java/com/fujitsu/launcher/microprofile/openapi/OpenApiServletTest.java
new file mode 100644
index 0000000..d7e73dc
--- /dev/null
+++ b/launcher-impl/microprofile/openapi/src/test/java/com/fujitsu/launcher/microprofile/openapi/OpenApiServletTest.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2021 Fujitsu Limited and/or its affiliates. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v. 2.0, which is available at
+ * http://www.eclipse.org/legal/epl-2.0.
+ *
+ * SPDX-License-Identifier: EPL-2.0
+ */
+
+package com.fujitsu.launcher.microprofile.openapi;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertThrows;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import java.io.IOException;
+import java.util.stream.Stream;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import io.smallrye.openapi.runtime.io.Format;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.Arguments;
+import org.junit.jupiter.params.provider.MethodSource;
+
+public class OpenApiServletTest {
+
+    HttpServletRequest mockRequest = mock(HttpServletRequest.class);
+    HttpServletResponse mockResponse = mock(HttpServletResponse.class);
+
+    OpenApiServlet servlet = spy(new OpenApiServlet());
+
+    @ParameterizedTest
+    @MethodSource({"provideOnlyAcceptHeader", "provideOnlyFormatQuery", "provideFormatQueryAndAcceptHeader"})
+    public void testGetResponseFormat(String format, String acceptHeader, Format expected) {
+        when(mockRequest.getParameter("format")).thenReturn(format);
+        when(mockRequest.getHeader("Accept")).thenReturn(acceptHeader);
+        Format result = servlet.getResponseFormat(mockRequest);
+        assertEquals(result, expected);
+    }
+
+    private static Stream<Arguments> provideOnlyAcceptHeader() {
+        return Stream.of(
+                // one value
+                Arguments.of(null, "", Format.YAML),
+                Arguments.of(null, "text/plain", Format.YAML),
+                Arguments.of(null, "application/json", Format.JSON),
+                Arguments.of(null, "*/*", Format.YAML),
+                Arguments.of(null, "text/*", Format.YAML),
+                Arguments.of(null, "application/*", Format.JSON),
+                Arguments.of(null, "hoge/hoge", null),
+
+                // two value
+                Arguments.of(null, "text/plain, application/json", Format.YAML),
+                Arguments.of(null, "application/json, text/plain", Format.JSON),
+                Arguments.of(null, "text/plain;q=0.9, application/json", Format.JSON),
+                Arguments.of(null, "application/json;q=0.9, text/plain", Format.YAML),
+
+                Arguments.of(null, "*/*, application/json", Format.JSON),
+                Arguments.of(null, "text/*, application/json", Format.JSON),
+                Arguments.of(null, "application/*, text/plain", Format.YAML),
+                Arguments.of(null, "text/*, application/json;q=0.9", Format.YAML),
+                Arguments.of(null, "application/*, text/plain;q=0.9", Format.JSON),
+
+                // three value
+                Arguments.of(null, "*/*, application/*, text/plain", Format.YAML),
+                Arguments.of(null, "*/*, application/*, text/plain;q=0.9", Format.JSON),
+                Arguments.of(null, "*/*, application/*;q=0.9, text/plain;q=0.8", Format.YAML)
+        );
+    }
+
+    private static Stream<Arguments> provideOnlyFormatQuery() {
+        return Stream.of(
+                // one value
+                Arguments.of("YAML", null, Format.YAML),
+                Arguments.of("JSON", null, Format.JSON),
+                Arguments.of("yaml", null, Format.YAML),
+                Arguments.of("json", null, Format.JSON),
+                Arguments.of("hoge", null, Format.YAML),
+                Arguments.of(null, null, Format.YAML)
+        );
+    }
+
+    private static Stream<Arguments> provideFormatQueryAndAcceptHeader() {
+        return Stream.of(
+                Arguments.of("YAML", "application/json", Format.YAML),
+                Arguments.of("JSON", "text/plain", Format.JSON),
+                Arguments.of("hoge", "application/json", Format.JSON)
+        );
+    }
+
+    @Test
+    public void testSendError406() throws IOException {
+        doReturn(null).when(servlet).getResponseFormat(mockRequest);
+        servlet.doGet(mockRequest, mockResponse);
+        verify(mockResponse, times(1)).sendError(406);
+    }
+
+    @Test
+    public void testThrowRuntimeException() {
+        when(mockRequest.getParameter("format")).thenReturn(null);
+        when(mockRequest.getHeader("Accept")).thenReturn("application/json:q=0.4"); //colon
+        assertThrows(RuntimeException.class, () -> servlet.getResponseFormat(mockRequest));
+    }
+
+}
\ No newline at end of file
diff --git a/pom.xml b/pom.xml
index 17bf88d..6526fbe 100644
--- a/pom.xml
+++ b/pom.xml
@@ -30,7 +30,7 @@
         <mp.health.version>3.1</mp.health.version>
         <mp.jwt-auth.version>1.2.2</mp.jwt-auth.version>
         <mp.metrics.version>3.0</mp.metrics.version>
-        <mp.openapi.version>1.1.2</mp.openapi.version>
+        <mp.openapi.version>2.0</mp.openapi.version>
         <mp.opentracing.version>1.3.1</mp.opentracing.version>
         <mp.rest-client.version>1.3.4</mp.rest-client.version>
         <glassfish.version>5.1.0</glassfish.version>
@@ -44,7 +44,7 @@
         <smallrye.health.version>3.1.1</smallrye.health.version>
         <smallrye.jwt.version>3.3.0</smallrye.jwt.version>
         <smallrye.metrics.version>3.0.3</smallrye.metrics.version>
-        <smallrye.openapi.version>1.0.2</smallrye.openapi.version>
+        <smallrye.openapi.version>2.1.15</smallrye.openapi.version>
         <smallrye.opentracing.version>1.3.2</smallrye.opentracing.version>
         <args4j.version>2.33</args4j.version>
         <jackson.version>2.9.4</jackson.version>
@@ -285,7 +285,12 @@
             </dependency>
             <dependency>
                 <groupId>io.smallrye</groupId>
-                <artifactId>smallrye-open-api-1.1</artifactId>
+                <artifactId>smallrye-open-api-core</artifactId>
+                <version>${smallrye.openapi.version}</version>
+            </dependency>
+            <dependency>
+                <groupId>io.smallrye</groupId>
+                <artifactId>smallrye-open-api-jaxrs</artifactId>
                 <version>${smallrye.openapi.version}</version>
             </dependency>
             <dependency>