diff --git a/projects/containerd/containerd/ATTRIBUTION.txt b/projects/containerd/containerd/ATTRIBUTION.txt
index 6229563688..043cb884ab 100644
--- a/projects/containerd/containerd/ATTRIBUTION.txt
+++ b/projects/containerd/containerd/ATTRIBUTION.txt
@@ -2,6 +2,9 @@
 ** github.com/containerd/aufs; version v1.0.0 --
 https://github.com/containerd/aufs
 
+** github.com/containerd/btrfs; version v1.0.0 --
+https://github.com/containerd/btrfs
+
 ** github.com/containerd/cgroups; version v1.0.4 --
 https://github.com/containerd/cgroups
 
@@ -967,6 +970,39 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 ------
 
+** github.com/miekg/pkcs11; version v1.1.1 --
+https://github.com/miekg/pkcs11
+
+Copyright (c) 2013 Miek Gieben. All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+   * Redistributions of source code must retain the above copyright
+notice, this list of conditions and the following disclaimer.
+   * Redistributions in binary form must reproduce the above
+copyright notice, this list of conditions and the following disclaimer
+in the documentation and/or other materials provided with the
+distribution.
+   * Neither the name of Miek Gieben nor the names of its
+contributors may be used to endorse or promote products derived from
+this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+------
+
 ** github.com/prometheus/common/internal/bitbucket.org/ww/goautoneg; version v0.30.0 --
 https://github.com/prometheus/common