diff --git a/.bazelrc b/.bazelrc
index 14cda5a03e7f13..00fbb683bbb209 100644
--- a/.bazelrc
+++ b/.bazelrc
@@ -2,8 +2,8 @@
 # Licensed under the Apache License, Version 2.0, see LICENSE for details.
 # SPDX-License-Identifier: Apache-2.0
 
-# Opt-out of bzlmod for now and continue to use `WORKSPACE`.
-common --noenable_bzlmod
+# Enable bzlmod using both `MODULE.bazel` and `WORKSPACE.bzlmod`.
+common --enable_bzlmod
 
 # https://docs.opentitan.org/doc/rm/c_cpp_coding_style/#cxx-version specifies
 build --action_env=BAZEL_CXXOPTS="-std=gnu++14"
diff --git a/.gitattributes b/.gitattributes
index 786d9197caf999..c1462e9e4f150e 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -26,3 +26,6 @@ sw/**/*.md  doc
 sw/**/*.svg doc
 sw/**/*.jpg doc
 sw/**/*.png doc
+
+# Generated lock files
+MODULE.bazel.lock linguist-generated=true
diff --git a/BUILD.bazel b/BUILD.bazel
index c51a52b8ea3d9d..36c85f77b16c12 100644
--- a/BUILD.bazel
+++ b/BUILD.bazel
@@ -5,7 +5,7 @@
 package(default_visibility = ["//visibility:public"])
 
 exports_files([
-    "WORKSPACE",
+    "WORKSPACE.bzlmod",
     "python-requirements.txt",
     "tool_requirements.py",
 ])
diff --git a/MODULE.bazel b/MODULE.bazel
new file mode 100644
index 00000000000000..5f06444ea04bc1
--- /dev/null
+++ b/MODULE.bazel
@@ -0,0 +1,5 @@
+# Copyright lowRISC contributors (OpenTitan project).
+# Licensed under the Apache License, Version 2.0, see LICENSE for details.
+# SPDX-License-Identifier: Apache-2.0
+
+module(name = "lowrisc_opentitan")
diff --git a/MODULE.bazel.lock b/MODULE.bazel.lock
new file mode 100644
index 00000000000000..21b358eb827002
--- /dev/null
+++ b/MODULE.bazel.lock
@@ -0,0 +1,110 @@
+{
+  "lockFileVersion": 11,
+  "registryFileHashes": {
+    "https://bcr.bazel.build/bazel_registry.json": "8a28e4aff06ee60aed2a8c281907fb8bcbf3b753c91fb5a5c57da3215d5b3497",
+    "https://bcr.bazel.build/modules/abseil-cpp/20210324.2/MODULE.bazel": "7cd0312e064fde87c8d1cd79ba06c876bd23630c83466e9500321be55c96ace2",
+    "https://bcr.bazel.build/modules/abseil-cpp/20211102.0/MODULE.bazel": "70390338f7a5106231d20620712f7cccb659cd0e9d073d1991c038eb9fc57589",
+    "https://bcr.bazel.build/modules/abseil-cpp/20211102.0/source.json": "7e3a9adf473e9af076ae485ed649d5641ad50ec5c11718103f34de03170d94ad",
+    "https://bcr.bazel.build/modules/apple_support/1.5.0/MODULE.bazel": "50341a62efbc483e8a2a6aec30994a58749bd7b885e18dd96aa8c33031e558ef",
+    "https://bcr.bazel.build/modules/apple_support/1.5.0/source.json": "eb98a7627c0bc486b57f598ad8da50f6625d974c8f723e9ea71bd39f709c9862",
+    "https://bcr.bazel.build/modules/bazel_features/1.11.0/MODULE.bazel": "f9382337dd5a474c3b7d334c2f83e50b6eaedc284253334cf823044a26de03e8",
+    "https://bcr.bazel.build/modules/bazel_features/1.11.0/source.json": "c9320aa53cd1c441d24bd6b716da087ad7e4ff0d9742a9884587596edfe53015",
+    "https://bcr.bazel.build/modules/bazel_skylib/1.0.3/MODULE.bazel": "bcb0fd896384802d1ad283b4e4eb4d718eebd8cb820b0a2c3a347fb971afd9d8",
+    "https://bcr.bazel.build/modules/bazel_skylib/1.2.1/MODULE.bazel": "f35baf9da0efe45fa3da1696ae906eea3d615ad41e2e3def4aeb4e8bc0ef9a7a",
+    "https://bcr.bazel.build/modules/bazel_skylib/1.3.0/MODULE.bazel": "20228b92868bf5cfc41bda7afc8a8ba2a543201851de39d990ec957b513579c5",
+    "https://bcr.bazel.build/modules/bazel_skylib/1.6.1/MODULE.bazel": "8fdee2dbaace6c252131c00e1de4b165dc65af02ea278476187765e1a617b917",
+    "https://bcr.bazel.build/modules/bazel_skylib/1.6.1/source.json": "082ed5f9837901fada8c68c2f3ddc958bb22b6d654f71dd73f3df30d45d4b749",
+    "https://bcr.bazel.build/modules/buildozer/7.1.2/MODULE.bazel": "2e8dd40ede9c454042645fd8d8d0cd1527966aa5c919de86661e62953cd73d84",
+    "https://bcr.bazel.build/modules/buildozer/7.1.2/source.json": "c9028a501d2db85793a6996205c8de120944f50a0d570438fcae0457a5f9d1f8",
+    "https://bcr.bazel.build/modules/googletest/1.11.0/MODULE.bazel": "3a83f095183f66345ca86aa13c58b59f9f94a2f81999c093d4eeaa2d262d12f4",
+    "https://bcr.bazel.build/modules/googletest/1.11.0/source.json": "c73d9ef4268c91bd0c1cd88f1f9dfa08e814b1dbe89b5f594a9f08ba0244d206",
+    "https://bcr.bazel.build/modules/platforms/0.0.4/MODULE.bazel": "9b328e31ee156f53f3c416a64f8491f7eb731742655a47c9eec4703a71644aee",
+    "https://bcr.bazel.build/modules/platforms/0.0.5/MODULE.bazel": "5733b54ea419d5eaf7997054bb55f6a1d0b5ff8aedf0176fef9eea44f3acda37",
+    "https://bcr.bazel.build/modules/platforms/0.0.6/MODULE.bazel": "ad6eeef431dc52aefd2d77ed20a4b353f8ebf0f4ecdd26a807d2da5aa8cd0615",
+    "https://bcr.bazel.build/modules/platforms/0.0.7/MODULE.bazel": "72fd4a0ede9ee5c021f6a8dd92b503e089f46c227ba2813ff183b71616034814",
+    "https://bcr.bazel.build/modules/platforms/0.0.9/MODULE.bazel": "4a87a60c927b56ddd67db50c89acaa62f4ce2a1d2149ccb63ffd871d5ce29ebc",
+    "https://bcr.bazel.build/modules/platforms/0.0.9/source.json": "cd74d854bf16a9e002fb2ca7b1a421f4403cda29f824a765acd3a8c56f8d43e6",
+    "https://bcr.bazel.build/modules/protobuf/21.7/MODULE.bazel": "a5a29bb89544f9b97edce05642fac225a808b5b7be74038ea3640fae2f8e66a7",
+    "https://bcr.bazel.build/modules/protobuf/21.7/source.json": "bbe500720421e582ff2d18b0802464205138c06056f443184de39fbb8187b09b",
+    "https://bcr.bazel.build/modules/protobuf/3.19.0/MODULE.bazel": "6b5fbb433f760a99a22b18b6850ed5784ef0e9928a72668b66e4d7ccd47db9b0",
+    "https://bcr.bazel.build/modules/protobuf/3.19.6/MODULE.bazel": "9233edc5e1f2ee276a60de3eaa47ac4132302ef9643238f23128fea53ea12858",
+    "https://bcr.bazel.build/modules/rules_cc/0.0.1/MODULE.bazel": "cb2aa0747f84c6c3a78dad4e2049c154f08ab9d166b1273835a8174940365647",
+    "https://bcr.bazel.build/modules/rules_cc/0.0.2/MODULE.bazel": "6915987c90970493ab97393024c156ea8fb9f3bea953b2f3ec05c34f19b5695c",
+    "https://bcr.bazel.build/modules/rules_cc/0.0.8/MODULE.bazel": "964c85c82cfeb6f3855e6a07054fdb159aced38e99a5eecf7bce9d53990afa3e",
+    "https://bcr.bazel.build/modules/rules_cc/0.0.9/MODULE.bazel": "836e76439f354b89afe6a911a7adf59a6b2518fafb174483ad78a2a2fde7b1c5",
+    "https://bcr.bazel.build/modules/rules_cc/0.0.9/source.json": "1f1ba6fea244b616de4a554a0f4983c91a9301640c8fe0dd1d410254115c8430",
+    "https://bcr.bazel.build/modules/rules_java/4.0.0/MODULE.bazel": "5a78a7ae82cd1a33cef56dc578c7d2a46ed0dca12643ee45edbb8417899e6f74",
+    "https://bcr.bazel.build/modules/rules_java/7.6.5/MODULE.bazel": "481164be5e02e4cab6e77a36927683263be56b7e36fef918b458d7a8a1ebadb1",
+    "https://bcr.bazel.build/modules/rules_java/7.6.5/source.json": "a805b889531d1690e3c72a7a7e47a870d00323186a9904b36af83aa3d053ee8d",
+    "https://bcr.bazel.build/modules/rules_jvm_external/4.4.2/MODULE.bazel": "a56b85e418c83eb1839819f0b515c431010160383306d13ec21959ac412d2fe7",
+    "https://bcr.bazel.build/modules/rules_jvm_external/4.4.2/source.json": "a075731e1b46bc8425098512d038d416e966ab19684a10a34f4741295642fc35",
+    "https://bcr.bazel.build/modules/rules_license/0.0.3/MODULE.bazel": "627e9ab0247f7d1e05736b59dbb1b6871373de5ad31c3011880b4133cafd4bd0",
+    "https://bcr.bazel.build/modules/rules_license/0.0.7/MODULE.bazel": "088fbeb0b6a419005b89cf93fe62d9517c0a2b8bb56af3244af65ecfe37e7d5d",
+    "https://bcr.bazel.build/modules/rules_license/0.0.7/source.json": "355cc5737a0f294e560d52b1b7a6492d4fff2caf0bef1a315df5a298fca2d34a",
+    "https://bcr.bazel.build/modules/rules_pkg/0.7.0/MODULE.bazel": "df99f03fc7934a4737122518bb87e667e62d780b610910f0447665a7e2be62dc",
+    "https://bcr.bazel.build/modules/rules_pkg/0.7.0/source.json": "c2557066e0c0342223ba592510ad3d812d4963b9024831f7f66fd0584dd8c66c",
+    "https://bcr.bazel.build/modules/rules_proto/4.0.0/MODULE.bazel": "a7a7b6ce9bee418c1a760b3d84f83a299ad6952f9903c67f19e4edd964894e06",
+    "https://bcr.bazel.build/modules/rules_proto/5.3.0-21.7/MODULE.bazel": "e8dff86b0971688790ae75528fe1813f71809b5afd57facb44dad9e8eca631b7",
+    "https://bcr.bazel.build/modules/rules_proto/5.3.0-21.7/source.json": "d57902c052424dfda0e71646cb12668d39c4620ee0544294d9d941e7d12bc3a9",
+    "https://bcr.bazel.build/modules/rules_python/0.10.2/MODULE.bazel": "cc82bc96f2997baa545ab3ce73f196d040ffb8756fd2d66125a530031cd90e5f",
+    "https://bcr.bazel.build/modules/rules_python/0.22.1/MODULE.bazel": "26114f0c0b5e93018c0c066d6673f1a2c3737c7e90af95eff30cfee38d0bbac7",
+    "https://bcr.bazel.build/modules/rules_python/0.22.1/source.json": "57226905e783bae7c37c2dd662be078728e48fa28ee4324a7eabcafb5a43d014",
+    "https://bcr.bazel.build/modules/rules_python/0.4.0/MODULE.bazel": "9208ee05fd48bf09ac60ed269791cf17fb343db56c8226a720fbb1cdf467166c",
+    "https://bcr.bazel.build/modules/stardoc/0.5.1/MODULE.bazel": "1a05d92974d0c122f5ccf09291442580317cdd859f07a8655f1db9a60374f9f8",
+    "https://bcr.bazel.build/modules/stardoc/0.5.1/source.json": "a96f95e02123320aa015b956f29c00cb818fa891ef823d55148e1a362caacf29",
+    "https://bcr.bazel.build/modules/upb/0.0.0-20220923-a547704/MODULE.bazel": "7298990c00040a0e2f121f6c32544bab27d4452f80d9ce51349b1a28f3005c43",
+    "https://bcr.bazel.build/modules/upb/0.0.0-20220923-a547704/source.json": "f1ef7d3f9e0e26d4b23d1c39b5f5de71f584dd7d1b4ef83d9bbba6ec7a6a6459",
+    "https://bcr.bazel.build/modules/zlib/1.2.11/MODULE.bazel": "07b389abc85fdbca459b69e2ec656ae5622873af3f845e1c9d80fe179f3effa0",
+    "https://bcr.bazel.build/modules/zlib/1.2.12/MODULE.bazel": "3b1a8834ada2a883674be8cbd36ede1b6ec481477ada359cd2d3ddc562340b27",
+    "https://bcr.bazel.build/modules/zlib/1.3.1.bcr.3/MODULE.bazel": "af322bc08976524477c79d1e45e241b6efbeb918c497e8840b8ab116802dda79",
+    "https://bcr.bazel.build/modules/zlib/1.3.1.bcr.3/source.json": "2be409ac3c7601245958cd4fcdff4288be79ed23bd690b4b951f500d54ee6e7d"
+  },
+  "selectedYankedVersions": {},
+  "moduleExtensions": {
+    "@@apple_support~//crosstool:setup.bzl%apple_cc_configure_extension": {
+      "general": {
+        "bzlTransitiveDigest": "PjIds3feoYE8SGbbIq2SFTZy3zmxeO2tQevJZNDo7iY=",
+        "usagesDigest": "aLmqbvowmHkkBPve05yyDNGN7oh7QE9kBADr3QIZTZs=",
+        "recordedFileInputs": {},
+        "recordedDirentsInputs": {},
+        "envVariables": {},
+        "generatedRepoSpecs": {
+          "local_config_apple_cc": {
+            "bzlFile": "@@apple_support~//crosstool:setup.bzl",
+            "ruleClassName": "_apple_cc_autoconf",
+            "attributes": {}
+          },
+          "local_config_apple_cc_toolchains": {
+            "bzlFile": "@@apple_support~//crosstool:setup.bzl",
+            "ruleClassName": "_apple_cc_autoconf_toolchains",
+            "attributes": {}
+          }
+        },
+        "recordedRepoMappingEntries": [
+          [
+            "apple_support~",
+            "bazel_tools",
+            "bazel_tools"
+          ]
+        ]
+      }
+    },
+    "@@platforms//host:extension.bzl%host_platform": {
+      "general": {
+        "bzlTransitiveDigest": "xelQcPZH8+tmuOHVjL9vDxMnnQNMlwj0SlvgoqBkm4U=",
+        "usagesDigest": "meSzxn3DUCcYEhq4HQwExWkWtU4EjriRBQLsZN+Q0SU=",
+        "recordedFileInputs": {},
+        "recordedDirentsInputs": {},
+        "envVariables": {},
+        "generatedRepoSpecs": {
+          "host_platform": {
+            "bzlFile": "@@platforms//host:extension.bzl",
+            "ruleClassName": "host_platform_repo",
+            "attributes": {}
+          }
+        },
+        "recordedRepoMappingEntries": []
+      }
+    }
+  }
+}
diff --git a/WORKSPACE b/WORKSPACE.bzlmod
similarity index 100%
rename from WORKSPACE
rename to WORKSPACE.bzlmod
diff --git a/quality/BUILD.bazel b/quality/BUILD.bazel
index 5442c3bf1f9732..ced3e05c7b1e02 100644
--- a/quality/BUILD.bazel
+++ b/quality/BUILD.bazel
@@ -79,7 +79,7 @@ licence_test(
     Licensed under the Apache License, Version 2.0, see LICENSE for details.
     SPDX-License-Identifier: Apache-2.0
     """,
-    workspace = "//:WORKSPACE",
+    workspace = "//:WORKSPACE.bzlmod",
 )
 
 format_exclude = [
@@ -99,7 +99,7 @@ clang_format_test(
     name = "clang_format_check",
     exclude_patterns = format_exclude,
     mode = "diff",
-    workspace = "//:WORKSPACE",
+    workspace = "//:WORKSPACE.bzlmod",
 )
 
 clang_format_check(
@@ -141,7 +141,7 @@ test_suite(
 )
 
 buildifier_exclude = [
-    "./WORKSPACE",  # Prevent Buildifier from inserting unnecessary newlines.
+    "./WORKSPACE.bzlmod",  # Prevent Buildifier from inserting unnecessary newlines.
     "./**/vendor/**",
     "./build/**",
     "./third_party/rust/crates/crates.bzl",  # Autogenerated by cargo-raze
@@ -159,7 +159,7 @@ buildifier_test(
     mode = "diff",
     no_sandbox = True,
     verbose = True,
-    workspace = "//:WORKSPACE",
+    workspace = "//:WORKSPACE.bzlmod",
 )
 
 # TODO(cfrantz): Find a way to keep this list of rust targets synchronized
@@ -194,7 +194,7 @@ RUST_TARGETS = [
 rustfmt_test(
     name = "rustfmt_check",
     exclude_patterns = format_exclude,
-    workspace = "//:WORKSPACE",
+    workspace = "//:WORKSPACE.bzlmod",
 )
 
 rustfmt_fix(
@@ -210,7 +210,7 @@ sh_test(
     name = "shellcheck_check",
     srcs = ["//util/sh/scripts:run-shellcheck.sh"],
     data = [
-        "//:WORKSPACE",
+        "//:WORKSPACE.bzlmod",
         "@shellcheck",
     ],
     env = {
diff --git a/rules/repo.bzl b/rules/repo.bzl
index 47f59dc139631b..f58929e0cf99c4 100644
--- a/rules/repo.bzl
+++ b/rules/repo.bzl
@@ -79,7 +79,7 @@ bare_repository = repository_rule(
             doc = "Script to create symlink trees for the `local` case.",
         ),
         "workspace": attr.label(
-            default = Label("//:WORKSPACE"),
+            default = Label("//:WORKSPACE.bzlmod"),
             allow_single_file = True,
             doc = "Root workspace.",
         ),
diff --git a/rules/scripts/clang_format.template.sh b/rules/scripts/clang_format.template.sh
index 286db050401c2d..d3738f91b77e23 100644
--- a/rules/scripts/clang_format.template.sh
+++ b/rules/scripts/clang_format.template.sh
@@ -16,7 +16,7 @@ elif [[ ! -z "${BUILD_WORKSPACE_DIRECTORY+is_set}" ]]; then
     cd ${BUILD_WORKSPACE_DIRECTORY} || exit 1
 else
     echo "Neither WORKSPACE nor BUILD_WORKSPACE_DIRECTORY were set."
-    echo "If this is a test rule, add 'workspace = \"//:WORKSPACE\"' to your rule."
+    echo "If this is a test rule, add 'workspace = \"//:WORKSPACE.bzlmod\"' to your rule."
     exit 1
 fi
 
diff --git a/rules/scripts/rustfmt.template.sh b/rules/scripts/rustfmt.template.sh
index 975e4ac42dfdf8..d34994761d0d15 100644
--- a/rules/scripts/rustfmt.template.sh
+++ b/rules/scripts/rustfmt.template.sh
@@ -16,7 +16,7 @@ elif [[ -n "${BUILD_WORKSPACE_DIRECTORY+is_set}" ]]; then
     cd "${BUILD_WORKSPACE_DIRECTORY}" || exit 1
 else
     echo "Neither WORKSPACE nor BUILD_WORKSPACE_DIRECTORY were set."
-    echo "If this is a test rule, add 'workspace = \"//:WORKSPACE\"' to your rule."
+    echo "If this is a test rule, add 'workspace = \"//:WORKSPACE.bzlmod\"' to your rule."
     exit 1
 fi
 
diff --git a/util/sh/scripts/run-shellcheck.sh b/util/sh/scripts/run-shellcheck.sh
index b9c764f814fd9e..38af8127484e2e 100755
--- a/util/sh/scripts/run-shellcheck.sh
+++ b/util/sh/scripts/run-shellcheck.sh
@@ -6,12 +6,12 @@
 set -e
 
 # Escape the sandbox when running under `bazel test`. This script assumes that
-# when it's invoked by Bazel, the Bazel target will depend on `//:WORKSPACE`.
+# when it's invoked by Bazel, the Bazel target will depend on `//:WORKSPACE.bzlmod`.
 # This assumption enables us to infer that we're running in the sandbox when we
-# see a symlink named "WORKSPACE".
-if [[ -L WORKSPACE ]]; then
+# see a symlink named "WORKSPACE.bzlmod".
+if [[ -L WORKSPACE.bzlmod ]]; then
     SHELLCHECK="$(realpath "${SHELLCHECK}")"
-    REPO_TOP="$(dirname "$(realpath WORKSPACE)")"
+    REPO_TOP="$(dirname "$(realpath WORKSPACE.bzlmod)")"
     cd "${REPO_TOP}"
 else
     REPO_TOP="$(git rev-parse --show-toplevel)"