diff --git a/.github/renovate.json5 b/.github/renovate.json5
index be10cd24..553e3f44 100644
--- a/.github/renovate.json5
+++ b/.github/renovate.json5
@@ -190,6 +190,16 @@
       ],
       depNameTemplate: "mypy-protobuf",
       datasourceTemplate: "pypi",
+    },
+    {
+      fileMatch: [
+        "variables.sh$"
+      ],
+      matchStrings: [
+        "PROTOBUF_JS_VERSION=\\$\\{PROTOBUF_JS_VERSION:-(?<currentValue>.*?)\\}\\n"
+      ],
+      depNameTemplate: "protocolbuffers/protobuf-javascript",
+      datasourceTemplate: "github-releases",
     }
   ],
   packageRules: [
diff --git a/Dockerfile b/Dockerfile
index 7cfd0fda..047c1ac9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,6 +15,7 @@ ARG go_mwitkow_gpv_version
 ARG go_protoc_gen_go_version
 ARG go_protoc_gen_go_grpc_version
 ARG mypy_version
+ARG protobuf_js_version
 
 FROM golang:$go_version-$debian_version AS build
 
@@ -30,6 +31,7 @@ ARG uber_prototool_version
 ARG go_protoc_gen_go_version
 ARG go_protoc_gen_go_grpc_version
 ARG mypy_version
+ARG protobuf_js_version
 
 
 RUN set -ex && apt-get update && apt-get install -y --no-install-recommends \
@@ -49,7 +51,8 @@ RUN set -ex && apt-get update && apt-get install -y --no-install-recommends \
 
 WORKDIR /tmp
 RUN git clone --depth 1 --shallow-submodules -b v$grpc_version.x --recursive https://github.com/grpc/grpc && \
-    git clone --depth 1 --shallow-submodules -b v$grpc_java_version.x --recursive https://github.com/grpc/grpc-java.git && \
+    git clone --depth 1 --shallow-submodules -b v$grpc_java_version.x --recursive https://github.com/grpc/grpc-java && \
+    git clone --depth 1 --shallow-submodules -b $protobuf_js_version --recursive https://github.com/protocolbuffers/protobuf-javascript && \
     git clone --depth 1 https://github.com/googleapis/googleapis && \
     git clone --depth 1 https://github.com/googleapis/api-common-protos
 
@@ -63,6 +66,9 @@ RUN $bazel build //external:protocol_compiler && \
 WORKDIR /tmp/grpc-java
 RUN $bazel build //compiler:grpc_java_plugin
 
+WORKDIR /tmp/protobuf-javascript
+RUN $bazel build //generator:protoc-gen-js
+
 WORKDIR /tmp
 # Install protoc required by envoyproxy/protoc-gen-validate package
 RUN cp -a /tmp/grpc/bazel-bin/external/com_google_protobuf/. /usr/local/bin/
@@ -164,6 +170,8 @@ COPY --from=build /tmp/grpc/bazel-bin/external/com_google_protobuf/ /usr/local/b
 COPY --from=build /tmp/grpc/bazel-bin/src/compiler/ /usr/local/bin/
 # Copy protoc java plugin
 COPY --from=build /tmp/grpc-java/bazel-bin/compiler/ /usr/local/bin/
+# Copy protoc js plugin
+COPY --from=build /tmp/protobuf-javascript/bazel-bin/generator/protoc-gen-js /usr/local/bin/
 # Copy grpc_cli
 COPY --from=build /tmp/grpc/bazel-bin/test/cpp/util/ /usr/local/bin/
 
diff --git a/build.sh b/build.sh
index 06020571..fbb7bf87 100755
--- a/build.sh
+++ b/build.sh
@@ -14,6 +14,7 @@ for build in ${BUILDS[@]}; do
         --build-arg grpc_web_version="${GRPC_WEB_VERSION}" \
         --build-arg grpc_gateway_version="${GRPC_GATEWAY_VERSION}" \
         --build-arg go_version="${GO_VERSION}" \
+        --build-arg protobuf_js_version="${PROTOBUF_JS_VERSION}" \
         --build-arg uber_prototool_version="${UBER_PROTOTOOL_VERSION}" \
         --build-arg scala_pb_version="${SCALA_PB_VERSION}" \
         --build-arg mypy_version="${MYPY_VERSION}" \
diff --git a/variables.sh b/variables.sh
index 693e5609..ea0480b8 100755
--- a/variables.sh
+++ b/variables.sh
@@ -12,6 +12,7 @@ GRPC_VERSION=${GRPC_VERSION:-1.48}
 GRPC_JAVA_VERSION=${GRPC_JAVA_VERSION:-1.48}
 GRPC_WEB_VERSION=${GRPC_WEB_VERSION:-1.3.1}
 GRPC_GATEWAY_VERSION=${GRPC_GATEWAY_VERSION:-v2.0.1}
+PROTOBUF_JS_VERSION=${PROTOBUF_JS_VERSION:-v3.21.0}
 UBER_PROTOTOOL_VERSION=${UBER_PROTOTOOL_VERSION:-1.10.0}
 SCALA_PB_VERSION=${SCALA_PB_VERSION:-0.11.0}
 MYPY_VERSION=${MYPY_VERSION:-3.3.0}
@@ -19,7 +20,7 @@ NODE_VERSION=${NODE_VERSION:-14}
 NODE_GRPC_TOOLS_NODE_PROTOC_TS_VERSION=${NODE_GRPC_TOOLS_NODE_PROTOC_TS_VERSION:-5.3.2}
 NODE_GRPC_TOOLS_VERSION=${NODE_GRPC_TOOLS_VERSION:-1.11.2}
 NODE_PROTOC_GEN_GRPC_WEB_VERSION=${NODE_PROTOC_GEN_GRPC_WEB_VERSION:-1.4.0}
-TS_PROTO_VERSION=${TS_PROTO_VERSION:1.117.0}
+TS_PROTO_VERSION=${TS_PROTO_VERSION:-1.117.0}
 GO_ENVOYPROXY_PGV_VERSION=${GO_ENVOYPROXY_PGV_VERSION:-0.6.8}
 GO_MWITKOW_GPV_VERSION=${GO_MWITKOW_GPV_VERSION:-0.3.2}
 GO_PROTOC_GEN_GO_VERSION=${GO_PROTOC_GEN_GO_VERSION:-v1.28.1}