diff --git a/appveyor.yml b/appveyor.yml
new file mode 100644
index 0000000..de3e378
--- /dev/null
+++ b/appveyor.yml
@@ -0,0 +1,23 @@
+environment:
+  matrix:
+    - nodejs_version: "6"
+    - nodejs_version: "8"
+
+# cache:
+#  - node_modules
+
+platform:
+  - x64
+
+install:
+  - ps: Install-Product node $env:nodejs_version $env:platform
+  - npm install
+
+test_script:
+  - node --version
+  - npm --version
+  - npm test
+
+build: off
+
+version: "{build}"
diff --git a/package.json b/package.json
index 63cba49..317b924 100644
--- a/package.json
+++ b/package.json
@@ -32,10 +32,10 @@
   "homepage": "https://github.com/ipld/js-ipld-resolver#readme",
   "license": "MIT",
   "devDependencies": {
-    "aegir": "^12.0.8",
+    "aegir": "^12.1.3",
     "chai": "^4.1.2",
     "dirty-chai": "^2.0.1",
-    "eth-hash-to-cid": "^0.1.0",
+    "eth-hash-to-cid": "~0.1.0",
     "ethereumjs-block": "^1.7.0",
     "lodash": "^4.17.4",
     "ncp": "^2.0.0",
@@ -46,20 +46,20 @@
   "dependencies": {
     "async": "^2.5.0",
     "cids": "~0.5.2",
-    "interface-datastore": "^0.3.1",
-    "ipfs-block": "~0.6.0",
-    "ipfs-block-service": "~0.12.0",
-    "ipfs-repo": "~0.17.0",
+    "interface-datastore": "~0.4.1",
+    "ipfs-block": "~0.6.1",
+    "ipfs-block-service": "~0.13.0",
+    "ipfs-repo": "~0.18.2",
     "ipld-dag-cbor": "~0.11.1",
     "ipld-dag-pb": "~0.11.2",
     "ipld-ethereum": "^1.4.3",
-    "ipld-git": "^0.1.0",
+    "ipld-git": "~0.1.0",
     "ipld-raw": "^1.0.6",
     "is-ipfs": "~0.3.2",
     "lodash.flatten": "^4.4.0",
     "lodash.includes": "^4.3.0",
     "memdown": "^1.4.1",
-    "multihashes": "~0.4.9",
+    "multihashes": "~0.4.12",
     "pull-sort": "^1.0.1",
     "pull-stream": "^3.6.1",
     "pull-traverse": "^1.0.3"
diff --git a/src/index.js b/src/index.js
index 1b07b0a..353c5fb 100644
--- a/src/index.js
+++ b/src/index.js
@@ -7,6 +7,7 @@ const doUntil = require('async/doUntil')
 const IPFSRepo = require('ipfs-repo')
 const BlockService = require('ipfs-block-service')
 const joinPath = require('path').join
+const osPathSep = require('path').sep
 const pullDeferSource = require('pull-defer').source
 const pullTraverse = require('pull-traverse')
 const map = require('async/map')
@@ -116,8 +117,12 @@ class IPLDResolver {
 
     // this removes occurrences of ./, //, ../
     // makes sure that path never starts with ./ or /
+    // path.join is OS specific. Need to convert back to POSIX format.
     if (typeof path === 'string') {
-      path = joinPath('/', path).substr(1)
+      path = joinPath('/', path)
+        .substr(1)
+        .split(osPathSep)
+        .join('/')
     }
 
     if (path === '' || !path) {
diff --git a/test/ipld-eth.js b/test/ipld-eth.js
index c7d0b82..2331b33 100644
--- a/test/ipld-eth.js
+++ b/test/ipld-eth.js
@@ -21,7 +21,8 @@ module.exports = (repo) => {
 
     let ethObjs
 
-    before((done) => {
+    before(function (done) {
+      this.timeout(10 * 1000)
       const bs = new BlockService(repo)
       resolver = new IPLDResolver(bs)