diff --git a/net/grpc/gateway/docker/ubuntu_14_04/Dockerfile b/net/grpc/gateway/docker/ubuntu_14_04/Dockerfile
index 1e8752e..1cc5134 100644
--- a/net/grpc/gateway/docker/ubuntu_14_04/Dockerfile
+++ b/net/grpc/gateway/docker/ubuntu_14_04/Dockerfile
@@ -77,6 +77,8 @@ RUN add-apt-repository ppa:openjdk-r/ppa && \
 COPY . /github/grpc-web
 
 RUN cd /github/grpc-web && \
+  rm -rf third_party && \
+  git checkout third_party && \
   ./scripts/init_submodules.sh
 
 RUN cd /github/grpc-web/third_party/grpc && \
diff --git a/net/grpc/gateway/docker/ubuntu_16_04/Dockerfile b/net/grpc/gateway/docker/ubuntu_16_04/Dockerfile
index ecf0666..595e39f 100644
--- a/net/grpc/gateway/docker/ubuntu_16_04/Dockerfile
+++ b/net/grpc/gateway/docker/ubuntu_16_04/Dockerfile
@@ -74,6 +74,8 @@ RUN apt-get update && apt-get install -y \
 COPY . /github/grpc-web
 
 RUN cd /github/grpc-web && \
+  rm -rf third_party && \
+  git checkout third_party && \
   ./scripts/init_submodules.sh
 
 RUN cd /github/grpc-web/third_party/grpc && \
diff --git a/scripts/darwin_x86_64.sh b/scripts/darwin_x86_64.sh
index 7481849..3ff9792 100755
--- a/scripts/darwin_x86_64.sh
+++ b/scripts/darwin_x86_64.sh
@@ -1,3 +1,18 @@
+#!/bin/bash
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# 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.
+
 cd "$(dirname "$0")"
 ./init_submodules.sh
 cd ..
diff --git a/scripts/debian_stretch.sh b/scripts/debian_stretch.sh
index 112f95d..fcc4d6b 100755
--- a/scripts/debian_stretch.sh
+++ b/scripts/debian_stretch.sh
@@ -1,3 +1,18 @@
+#!/bin/bash
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 cd "$(dirname "$0")"
 ./init_submodules.sh
 cd ..
diff --git a/scripts/init_submodules.sh b/scripts/init_submodules.sh
index fe4e770..9657eea 100755
--- a/scripts/init_submodules.sh
+++ b/scripts/init_submodules.sh
@@ -1,8 +1,20 @@
-cd "$(dirname "$0")"
-cd ..
+#!/bin/bash
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+cd "$(dirname "$0")"/..
 git submodule update --init
 cd third_party/closure-library && git checkout tags/v20171112 -f && cd ../..
 cd third_party/openssl && git checkout tags/OpenSSL_1_0_2h -f && cd ../..
 cd third_party/grpc && git checkout 8224c45 -f && git submodule update --init && cd ../..
-cd scripts/
-
diff --git a/scripts/ubuntu_12_04.sh b/scripts/ubuntu_12_04.sh
index bf6ffbb..dc9cca8 100755
--- a/scripts/ubuntu_12_04.sh
+++ b/scripts/ubuntu_12_04.sh
@@ -1,3 +1,18 @@
+#!/bin/bash
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 cd "$(dirname "$0")"
 ./init_submodules.sh
 cd ..
diff --git a/scripts/ubuntu_14_04.sh b/scripts/ubuntu_14_04.sh
index 45c4273..918b317 100755
--- a/scripts/ubuntu_14_04.sh
+++ b/scripts/ubuntu_14_04.sh
@@ -1,3 +1,18 @@
+#!/bin/bash
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 cd "$(dirname "$0")"
 ./init_submodules.sh
 cd ..
diff --git a/scripts/ubuntu_16_04.sh b/scripts/ubuntu_16_04.sh
new file mode 100644
index 0000000..1816385
--- /dev/null
+++ b/scripts/ubuntu_16_04.sh
@@ -0,0 +1,24 @@
+#!/bin/bash
+# Copyright 2018 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+cd "$(dirname "$0")"
+./init_submodules.sh
+cd ..
+make clean
+docker build -t ubuntu_16_04 -f net/grpc/gateway/docker/ubuntu_16_04/Dockerfile .
+CONTAINER_ID=$(docker create ubuntu_16_04)
+docker cp "$CONTAINER_ID:/github/grpc-web/gConnector.zip" net/grpc/gateway/docker/ubuntu_16_04
+docker cp "$CONTAINER_ID:/github/grpc-web/gConnector_static.zip" net/grpc/gateway/docker/ubuntu_16_04
+docker rm "$CONTAINER_ID"