diff --git a/WORKSPACE b/WORKSPACE
index 74ea14d0fd7..622fa4d1412 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -49,34 +49,34 @@ remote_config_workspace()
 # Apple and Swift rules.
 http_archive(
     name = "build_bazel_rules_apple",
-    sha256 = "6efdde60c91724a2be7f89b0c0a64f01138a45e63ba5add2dca2645d981d23a1",
-    urls = ["https://github.com/bazelbuild/rules_apple/releases/download/0.17.2/rules_apple.0.17.2.tar.gz"],
+    sha256 = "a045a436b642c70fb0c10ca84ff0fd2dcbd59cc89100d597a61e8374afafb366",
+    urls = ["https://github.com/bazelbuild/rules_apple/releases/download/0.18.0/rules_apple.0.18.0.tar.gz"],
 )  # https://github.com/bazelbuild/rules_apple/releases
 http_archive(
     name = "build_bazel_rules_swift",
-    sha256 = "96a86afcbdab215f8363e65a10cf023b752e90b23abf02272c4fc668fcb70311",
-    urls = ["https://github.com/bazelbuild/rules_swift/releases/download/0.11.1/rules_swift.0.11.1.tar.gz"],
+    sha256 = "18cd4df4e410b0439a4935f9ca035bd979993d42372ba79e7f2d4fafe9596ef0",
+    urls = ["https://github.com/bazelbuild/rules_swift/releases/download/0.12.1/rules_swift.0.12.1.tar.gz"],
 )  # https://github.com/bazelbuild/rules_swift/releases
 http_archive(
     name = "build_bazel_apple_support",
-    sha256 = "7356dbd44dea71570a929d1d4731e870622151a5f27164d966dda97305f33471",
-    urls = ["https://github.com/bazelbuild/apple_support/releases/download/0.6.0/apple_support.0.6.0.tar.gz"],
+    sha256 = "122ebf7fe7d1c8e938af6aeaee0efe788a3a2449ece5a8d6a428cb18d6f88033",
+    urls = ["https://github.com/bazelbuild/apple_support/releases/download/0.7.1/apple_support.0.7.1.tar.gz"],
 )  # https://github.com/bazelbuild/apple_support/releases
 http_archive(
     name = "bazel_skylib",
-    sha256 = "2ef429f5d7ce7111263289644d233707dba35e39696377ebab8b0bc701f7818e",
-    urls = ["https://github.com/bazelbuild/bazel-skylib/releases/download/0.8.0/bazel-skylib.0.8.0.tar.gz"],
+    sha256 = "1dde365491125a3db70731e25658dfdd3bc5dbdfd11b840b3e987ecf043c7ca0",
+    urls = ["https://github.com/bazelbuild/bazel-skylib/releases/download/0.9.0/bazel-skylib.0.9.0.tar.gz"],
 )  # https://github.com/bazelbuild/bazel-skylib/releases
 http_archive(
     name = "com_github_apple_swift_swift_protobuf",
     type = "zip",
-    strip_prefix = "swift-protobuf-1.5.0/",
-    urls = ["https://github.com/apple/swift-protobuf/archive/1.5.0.zip"],
+    strip_prefix = "swift-protobuf-1.6.0/",
+    urls = ["https://github.com/apple/swift-protobuf/archive/1.6.0.zip"],
 )  # https://github.com/apple/swift-protobuf/releases
 http_file(
     name = "xctestrunner",
     executable = 1,
-    urls = ["https://github.com/google/xctestrunner/releases/download/0.2.7/ios_test_runner.par"],
+    urls = ["https://github.com/google/xctestrunner/releases/download/0.2.9/ios_test_runner.par"],
 )  # https://github.com/google/xctestrunner/releases
 # Use `swift_rules_dependencies` to fetch the toolchains. With the
 # `git_repository` rules above, the following call will skip redefining them.