diff --git a/.changeset/fix-webdriverio-peer-to-dep-v8.md b/.changeset/fix-webdriverio-peer-to-dep-v8.md
new file mode 100644
index 0000000..cf1fa5d
--- /dev/null
+++ b/.changeset/fix-webdriverio-peer-to-dep-v8.md
@@ -0,0 +1,5 @@
+---
+"@wdio/browserstack-service": patch
+---
+
+Declare `webdriverio` as a dependency instead of a peerDependency, matching the v8 package published from the WebdriverIO monorepo (`@wdio/browserstack-service@8.48.3` keeps `webdriverio` in `dependencies` at `8.46.0`, peering only `@wdio/cli`). The extraction had moved it into `peerDependencies` (`^8.0.0`), which forces the consumer's `webdriverio` and can `npm ERESOLVE` against a dep peering a non-overlapping `webdriverio` range. Restores install parity with the upstream v8 package; no user-facing API change.
diff --git a/package-lock.json b/package-lock.json
index 5c5affc..c621b18 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8945,6 +8945,7 @@
         "got": "^12.6.1",
         "tar": "^6.1.15",
         "uuid": "^10.0.0",
+        "webdriverio": "8.46.0",
         "winston-transport": "^4.5.0",
         "yauzl": "^3.0.0"
       },
@@ -8969,8 +8970,7 @@
         "node": "^16.13 || >=18"
       },
       "peerDependencies": {
-        "@wdio/cli": "^5.0.0 || ^6.0.0 || ^7.0.0 || ^8.0.0",
-        "webdriverio": "^8.0.0"
+        "@wdio/cli": "^5.0.0 || ^6.0.0 || ^7.0.0 || ^8.0.0"
       }
     }
   }
diff --git a/packages/browserstack-service/package.json b/packages/browserstack-service/package.json
index 2257cb4..bac3449 100644
--- a/packages/browserstack-service/package.json
+++ b/packages/browserstack-service/package.json
@@ -66,11 +66,11 @@
     "yauzl": "^3.0.0",
     "@wdio/logger": "8.38.0",
     "@wdio/reporter": "8.43.0",
-    "@wdio/types": "8.41.0"
+    "@wdio/types": "8.41.0",
+    "webdriverio": "8.46.0"
   },
   "peerDependencies": {
-    "@wdio/cli": "^5.0.0 || ^6.0.0 || ^7.0.0 || ^8.0.0",
-    "webdriverio": "^8.0.0"
+    "@wdio/cli": "^5.0.0 || ^6.0.0 || ^7.0.0 || ^8.0.0"
   },
   "devDependencies": {
     "@bufbuild/buf": "^1.55.1",