diff --git a/BUILD b/BUILD
index 89a33095dd..1107a7b75e 100644
--- a/BUILD
+++ b/BUILD
@@ -114,6 +114,10 @@ COPTS = select({
         "-march=rv64gcv1p0",
         "-menable-experimental-extensions",
     ],
+    "@platforms//cpu:loongarch64": [
+        "-mlsx",
+        "-mlasx",
+    ],
     "//conditions:default": [
     ],
 })
@@ -193,6 +197,10 @@ cc_library(
         "//conditions:default": [],
     }) + select({
         "@platforms//cpu:riscv64": ["hwy/ops/rvv-inl.h"],
+        "@platforms//cpu:loongarch64": [
+            "hwy/ops/loongarch_lsx-inl.h",
+            "hwy/ops/loongarch_lasx-inl.h",
+            ],
         "//conditions:default": [],
     }),
 )
@@ -580,6 +588,7 @@ HWY_TEST_DEPS = [
             # Fixes OOM for matvec_test on RVV.
             exec_properties = select({
                 "@platforms//cpu:riscv64": {"mem": "16g"},
+		"@platforms//cpu:loongarch64": {"mem": "16g"},
                 "//conditions:default": None,
             }),
             features = select({
@@ -599,6 +608,7 @@ HWY_TEST_DEPS = [
             }),
             linkstatic = select({
                 "@platforms//cpu:riscv64": True,
+		"@platforms//cpu:loongarch64": True,
                 "//conditions:default": False,
             }),
             local_defines = ["HWY_IS_TEST"],
diff --git a/WORKSPACE b/WORKSPACE
index 8dab288d06..78c9d89aa5 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -4,13 +4,13 @@ load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")
 load("@bazel_tools//tools/build_defs/repo:utils.bzl", "maybe")
 
 # Bazel platform rules.
-maybe(
-    http_archive,
+http_archive(
     name = "platforms",
     urls = [
-        "https://github.com/bazelbuild/platforms/releases/download/0.0.7/platforms-0.0.7.tar.gz",
+        "https://mirror.bazel.build/github.com/bazelbuild/platforms/releases/download/1.0.0/platforms-1.0.0.tar.gz",
+        "https://github.com/bazelbuild/platforms/releases/download/1.0.0/platforms-1.0.0.tar.gz",
     ],
-    sha256 = "3a561c99e7bdbe9173aa653fd579fe849f1d8d67395780ab4770b1f381431d51",
+    sha256 = "3384eb1c30762704fbe38e440204e114154086c8fc8a8c2e3e28441028c019a8",
 )
 
 maybe(