diff --git a/WORKSPACE b/WORKSPACE
index 4147e12b..735fb0e6 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -1,11 +1,13 @@
 workspace(name = "com_github_grpc_grpc_web")
 
+load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
+
 http_archive(
     name = "io_bazel_rules_closure",
-    sha256 = "a8ea3251a6fd05eb3dbd05aa443a12b04cb88d80480d821bee453b18db97afaa",
-    strip_prefix = "rules_closure-8ec740d0b77ca1fb4914c857dc67ccc3f9cb3ed4",
+    sha256 = "3098d87bb0b5be7399b402da45b360b07a401bbd6d2b0033b0c16c4d060f4d01",
+    strip_prefix = "rules_closure-d1110778a2e94bcdac5d5d00044dcb6cd07f1d51",
     urls = [
-        "https://github.com/bazelbuild/rules_closure/archive/8ec740d0b77ca1fb4914c857dc67ccc3f9cb3ed4.zip",
+        "https://github.com/bazelbuild/rules_closure/archive/d1110778a2e94bcdac5d5d00044dcb6cd07f1d51.zip",
     ],
 )
 
diff --git a/scripts/kokoro.sh b/scripts/kokoro.sh
index 6b0ad6ce..a0dfeed3 100755
--- a/scripts/kokoro.sh
+++ b/scripts/kokoro.sh
@@ -31,7 +31,7 @@ done
 docker-compose -f advanced.yml build
 
 # Run all bazel unit tests
-BAZEL_VERSION=0.19.1
+BAZEL_VERSION=0.22.0
 wget https://github.com/bazelbuild/bazel/releases/download/"${BAZEL_VERSION}"/bazel-"${BAZEL_VERSION}"-installer-linux-x86_64.sh
 chmod +x ./bazel-"${BAZEL_VERSION}"-installer-linux-x86_64.sh
 ./bazel-"${BAZEL_VERSION}"-installer-linux-x86_64.sh --user