diff --git a/.drone.jsonnet b/.drone.jsonnet
index b35b1598d..06e479e5a 100644
--- a/.drone.jsonnet
+++ b/.drone.jsonnet
@@ -217,7 +217,7 @@ local mac_builder(name, build_type='Release', werror=true, cmake_extra='', extra
                 'echo "Building on ${DRONE_STAGE_MACHINE}"',
                 apt_get_quiet + ' update',
                 apt_get_quiet + ' install -y eatmydata',
-                'eatmydata ' + apt_get_quiet + ' install -y git clang-format-9',
+                'eatmydata ' + apt_get_quiet + ' install -y git clang-format-11',
                 './contrib/ci/drone-format-verify.sh']
         }]
     },
diff --git a/contrib/ci/docker/lint.dockerfile b/contrib/ci/docker/lint.dockerfile
index a9200c3c1..f247fd6a7 100644
--- a/contrib/ci/docker/lint.dockerfile
+++ b/contrib/ci/docker/lint.dockerfile
@@ -1,3 +1,3 @@
 FROM debian:sid
 RUN /bin/bash -c 'echo "man-db man-db/auto-update boolean false" | debconf-set-selections'
-RUN /bin/bash -c 'apt-get -o=Dpkg::Use-Pty=0 -q update && apt-get -o=Dpkg::Use-Pty=0 -q install -y eatmydata git clang-format-9'
\ No newline at end of file
+RUN /bin/bash -c 'apt-get -o=Dpkg::Use-Pty=0 -q update && apt-get -o=Dpkg::Use-Pty=0 -q install -y eatmydata git clang-format-11'
diff --git a/contrib/ci/drone-format-verify.sh b/contrib/ci/drone-format-verify.sh
index 09062a369..68a7ac620 100755
--- a/contrib/ci/drone-format-verify.sh
+++ b/contrib/ci/drone-format-verify.sh
@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
 test "x$IGNORE" != "x" && exit 0
 repo=$(readlink -e $(dirname $0)/../../)
-clang-format-9 -i $(find $repo/jni $repo/daemon $repo/llarp $repo/include $repo/pybind | grep -E '\.[hc](pp)?$')
+clang-format-11 -i $(find $repo/jni $repo/daemon $repo/llarp $repo/include $repo/pybind | grep -E '\.[hc](pp)?$')
 git --no-pager diff --exit-code --color || (echo -ne '\n\n\e[31;1mLint check failed; please run ./contrib/format.sh\e[0m\n\n' ; exit 1)
diff --git a/contrib/format.sh b/contrib/format.sh
index 6cb8b0ff8..ed3936857 100755
--- a/contrib/format.sh
+++ b/contrib/format.sh
@@ -2,4 +2,4 @@
 
 # TODO: readlink -e is a GNU-ism
 cd "$(readlink -e $(dirname $0)/../)"
-clang-format-9 -i $(find jni daemon llarp include pybind | grep -E '\.[hc](pp)?$') &> /dev/null
+clang-format-11 -i $(find jni daemon llarp include pybind | grep -E '\.[hc](pp)?$') &> /dev/null