diff --git a/projects/gnutls/Dockerfile b/projects/gnutls/Dockerfile
index 7043aa48a..5d902272e 100644
--- a/projects/gnutls/Dockerfile
+++ b/projects/gnutls/Dockerfile
@@ -14,11 +14,7 @@
 #
 ################################################################################
 
-# Using Ubuntu 16.04 because of breakage on Ubuntu 20.04.
-# See https://github.com/google/oss-fuzz/issues/6291 for more details.
-FROM gcr.io/oss-fuzz-base/base-builder:xenial
-# Delete line above and uncomment line below to upgrade to 20.04.
-# FROM gcr.io/oss-fuzz-base/base-builder
+FROM gcr.io/oss-fuzz-base/base-builder
 RUN apt-get update && apt-get install -y \
  make \
  pkg-config \