diff --git a/.gitmodules b/.gitmodules
index 92e5c3e7..a0bb8380 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,6 +1,6 @@
 [submodule "third_party/ukey2"]
 	path = third_party/ukey2
-	url = sso://team/nearby-eng/ukey2
+	url = https://github.com/google/ukey2
 	branch = master
 [submodule "third_party/protobuf"]
 	path = third_party/protobuf
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 00000000..939e5341
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,28 @@
+# How to Contribute
+
+We'd love to accept your patches and contributions to this project. There are
+just a few small guidelines you need to follow.
+
+## Contributor License Agreement
+
+Contributions to this project must be accompanied by a Contributor License
+Agreement. You (or your employer) retain the copyright to your contribution;
+this simply gives us permission to use and redistribute your contributions as
+part of the project. Head over to <https://cla.developers.google.com/> to see
+your current agreements on file or to sign a new one.
+
+You generally only need to submit a CLA once, so if you've already submitted one
+(even if it was for a different project), you probably don't need to do it
+again.
+
+## Code reviews
+
+All submissions, including submissions by project members, require review. We
+use GitHub pull requests for this purpose. Consult
+[GitHub Help](https://help.github.com/articles/about-pull-requests/) for more
+information on using pull requests.
+
+## Community Guidelines
+
+This project follows [Google's Open Source Community
+Guidelines](https://opensource.google.com/conduct/).
diff --git a/script/oss.py b/script/oss.py
index bcf835bf..cd0199d8 100755
--- a/script/oss.py
+++ b/script/oss.py
@@ -17,6 +17,7 @@
 
 import argparse
 import os
+import re
 import shutil
 import sys
 
@@ -34,6 +35,8 @@ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 See the License for the specific language governing permissions and
 limitations under the License.""".split("\n")
 
+headline_match=".*Copyright [0-9,\- ]+ Google.*"
+
 MISSING = 0
 HEADLINE = 1
 PARTIAL = 2
@@ -41,20 +44,24 @@ FULL = 3
 
 def has_copyright(lines, max_lookup=3):
   pos = 0
+  result = MISSING
+  headline = re.compile(headline_match)
   for line in lines:
     pos += 1 # points to the next line
-    if line.find(copy_header[0]) >= 0:
+    if headline.match(line) != None:
+      result = HEADLINE
       break
     if pos > max_lookup:
-      return MISSING
-
-  result = HEADLINE
+      return result
 
   for line in copy_header[1:]:
+    if pos >= len(lines):
+      return result
     if lines[pos].find(line) < 0:
       return result
     else:
       result = PARTIAL
+      pos += 1
 
   return FULL
 
diff --git a/third_party/ukey2 b/third_party/ukey2
index 2fc30c88..4550c848 160000
--- a/third_party/ukey2
+++ b/third_party/ukey2
@@ -1 +1 @@
-Subproject commit 2fc30c8894da17442c476d9416b5a811bfe88e32
+Subproject commit 4550c84830286c24f8c189cbd54edbbd986a2dd1