diff --git a/codec-http2/src/main/java/io/netty/handler/codec/http2/AbstractHttp2StreamChannel.java b/codec-http2/src/main/java/io/netty/handler/codec/http2/AbstractHttp2StreamChannel.java
index 6ccff12288..15478d2eb7 100644
--- a/codec-http2/src/main/java/io/netty/handler/codec/http2/AbstractHttp2StreamChannel.java
+++ b/codec-http2/src/main/java/io/netty/handler/codec/http2/AbstractHttp2StreamChannel.java
@@ -1013,7 +1013,7 @@ abstract class AbstractHttp2StreamChannel extends DefaultAttributeMap implements
      * window, without having to create a new {@link WriteBufferWaterMark} object whenever the flow control window
      * changes.
      */
-    private final class Http2StreamChannelConfig extends DefaultChannelConfig {
+    private static final class Http2StreamChannelConfig extends DefaultChannelConfig {
         Http2StreamChannelConfig(Channel channel) {
             super(channel);
         }
diff --git a/resolver-dns/src/main/java/io/netty/resolver/dns/DnsNameResolver.java b/resolver-dns/src/main/java/io/netty/resolver/dns/DnsNameResolver.java
index 7bb5f2436d..7dbc148f80 100644
--- a/resolver-dns/src/main/java/io/netty/resolver/dns/DnsNameResolver.java
+++ b/resolver-dns/src/main/java/io/netty/resolver/dns/DnsNameResolver.java
@@ -1327,7 +1327,7 @@ public class DnsNameResolver extends InetNameResolver {
         }
     }
 
-    private final class AddressedEnvelopeAdapter implements AddressedEnvelope<DnsResponse, InetSocketAddress> {
+    private static final class AddressedEnvelopeAdapter implements AddressedEnvelope<DnsResponse, InetSocketAddress> {
         private final InetSocketAddress sender;
         private final InetSocketAddress recipient;
         private final DnsResponse response;