diff --git a/Dockerfile b/Dockerfile
index 29cdc80f96..edf5a0602d 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -12,5 +12,5 @@ FROM alpine:latest
 RUN apk add --no-cache ca-certificates
 COPY --from=builder /go-ethereum/build/bin/geth /usr/local/bin/
 
-EXPOSE 8545 8546 30303 30303/udp 30304/udp
+EXPOSE 8545 8546 30303 30303/udp
 ENTRYPOINT ["geth"]
diff --git a/Dockerfile.alltools b/Dockerfile.alltools
index 1047738d25..e54e107bf3 100644
--- a/Dockerfile.alltools
+++ b/Dockerfile.alltools
@@ -12,4 +12,4 @@ FROM alpine:latest
 RUN apk add --no-cache ca-certificates
 COPY --from=builder /go-ethereum/build/bin/* /usr/local/bin/
 
-EXPOSE 8545 8546 30303 30303/udp 30304/udp
+EXPOSE 8545 8546 30303 30303/udp