diff --git a/packages/gatsby-transformer-excel/package.json b/packages/gatsby-transformer-excel/package.json
index d9336c3ac4e92..a8a802d4525f2 100644
--- a/packages/gatsby-transformer-excel/package.json
+++ b/packages/gatsby-transformer-excel/package.json
@@ -25,7 +25,7 @@
   "license": "MIT",
   "main": "index.js",
   "peerDependencies": {
-    "gatsby": "^2.0.0"
+    "gatsby": "^2.0.15"
   },
   "repository": "https://github.com/gatsbyjs/gatsby/tree/master/packages/gatsby-transformer-excel",
   "scripts": {
diff --git a/packages/gatsby-transformer-excel/src/__tests__/__snapshots__/gatsby-node.js.snap b/packages/gatsby-transformer-excel/src/__tests__/__snapshots__/gatsby-node.js.snap
index 5c31be92a58dd..19d5474d07bfe 100644
--- a/packages/gatsby-transformer-excel/src/__tests__/__snapshots__/gatsby-node.js.snap
+++ b/packages/gatsby-transformer-excel/src/__tests__/__snapshots__/gatsby-node.js.snap
@@ -9,7 +9,7 @@ Array [
       "funny": "yup",
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "73901821b17d5aa9dd6026181f73b64c",
+        "contentDigest": "contentDigest",
         "type": "TestCsv__Sheet1",
       },
       "parent": "whatever",
@@ -22,7 +22,7 @@ Array [
       "funny": "nope",
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "f624311d932d73dcd416d2a8bea2b67d",
+        "contentDigest": "contentDigest",
         "type": "TestCsv__Sheet1",
       },
       "parent": "whatever",
@@ -33,7 +33,7 @@ Array [
       "children": Array [],
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "10c867561d207bc7dae0455d3cccad5b",
+        "contentDigest": "contentDigest",
         "type": "TestCsv",
       },
       "parent": "whatever",
@@ -52,7 +52,7 @@ Array [
         "funny": "yup",
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "73901821b17d5aa9dd6026181f73b64c",
+          "contentDigest": "contentDigest",
           "type": "TestCsv__Sheet1",
         },
         "parent": "whatever",
@@ -82,7 +82,7 @@ FALSE,nope
         "funny": "nope",
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "f624311d932d73dcd416d2a8bea2b67d",
+          "contentDigest": "contentDigest",
           "type": "TestCsv__Sheet1",
         },
         "parent": "whatever",
@@ -110,7 +110,7 @@ FALSE,nope
         "children": Array [],
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "10c867561d207bc7dae0455d3cccad5b",
+          "contentDigest": "contentDigest",
           "type": "TestCsv",
         },
         "parent": "whatever",
@@ -142,7 +142,7 @@ Array [
       "children": Array [],
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "c685d551c99950924e4b7a78a267a993",
+        "contentDigest": "contentDigest",
         "type": "TestCsv__Sheet1",
       },
       "parent": "whatever",
@@ -155,7 +155,7 @@ Array [
       "children": Array [],
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "f197dfd371325c9aa0693a4c406f6cff",
+        "contentDigest": "contentDigest",
         "type": "TestCsv__Sheet1",
       },
       "parent": "whatever",
@@ -168,7 +168,7 @@ Array [
       "children": Array [],
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "10c867561d207bc7dae0455d3cccad5b",
+        "contentDigest": "contentDigest",
         "type": "TestCsv",
       },
       "parent": "whatever",
@@ -185,7 +185,7 @@ Array [
         "children": Array [],
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "c685d551c99950924e4b7a78a267a993",
+          "contentDigest": "contentDigest",
           "type": "TestCsv__Sheet1",
         },
         "parent": "whatever",
@@ -215,7 +215,7 @@ FALSE,nada
         "children": Array [],
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "f197dfd371325c9aa0693a4c406f6cff",
+          "contentDigest": "contentDigest",
           "type": "TestCsv__Sheet1",
         },
         "parent": "whatever",
@@ -245,7 +245,7 @@ FALSE,nada
         "children": Array [],
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "10c867561d207bc7dae0455d3cccad5b",
+          "contentDigest": "contentDigest",
           "type": "TestCsv",
         },
         "parent": "whatever",
@@ -277,7 +277,7 @@ Array [
       "children": Array [],
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "c685d551c99950924e4b7a78a267a993",
+        "contentDigest": "contentDigest",
         "type": "TestCsv__Sheet1",
       },
       "parent": "whatever",
@@ -290,7 +290,7 @@ Array [
       "children": Array [],
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "f197dfd371325c9aa0693a4c406f6cff",
+        "contentDigest": "contentDigest",
         "type": "TestCsv__Sheet1",
       },
       "parent": "whatever",
@@ -303,7 +303,7 @@ Array [
       "children": Array [],
       "id": "uuid-from-gatsby",
       "internal": Object {
-        "contentDigest": "10c867561d207bc7dae0455d3cccad5b",
+        "contentDigest": "contentDigest",
         "type": "TestCsv",
       },
       "parent": "whatever",
@@ -320,7 +320,7 @@ Array [
         "children": Array [],
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "c685d551c99950924e4b7a78a267a993",
+          "contentDigest": "contentDigest",
           "type": "TestCsv__Sheet1",
         },
         "parent": "whatever",
@@ -350,7 +350,7 @@ FALSE,nada
         "children": Array [],
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "f197dfd371325c9aa0693a4c406f6cff",
+          "contentDigest": "contentDigest",
           "type": "TestCsv__Sheet1",
         },
         "parent": "whatever",
@@ -380,7 +380,7 @@ FALSE,nada
         "children": Array [],
         "id": "uuid-from-gatsby",
         "internal": Object {
-          "contentDigest": "10c867561d207bc7dae0455d3cccad5b",
+          "contentDigest": "contentDigest",
           "type": "TestCsv",
         },
         "parent": "whatever",
diff --git a/packages/gatsby-transformer-excel/src/__tests__/gatsby-node.js b/packages/gatsby-transformer-excel/src/__tests__/gatsby-node.js
index 00ccf2b0e50ce..ae51ff027a3b4 100644
--- a/packages/gatsby-transformer-excel/src/__tests__/gatsby-node.js
+++ b/packages/gatsby-transformer-excel/src/__tests__/gatsby-node.js
@@ -29,17 +29,20 @@ describe(`Process nodes correctly`, () => {
     const actions = { createNode, createParentChildLink }
     const createNodeId = jest.fn()
     createNodeId.mockReturnValue(`uuid-from-gatsby`)
+    const createDigestContent = jest.fn().mockReturnValue(`contentDigest`)
 
     await onCreateNode({
       node,
       loadNodeContent,
       actions,
       createNodeId,
+      createDigestContent,
     }).then(() => {
       expect(createNode.mock.calls).toMatchSnapshot()
       expect(createParentChildLink.mock.calls).toMatchSnapshot()
       expect(createNode).toHaveBeenCalledTimes(2 + 1)
       expect(createParentChildLink).toHaveBeenCalledTimes(2 + 1)
+      expect(createDigestContent).toHaveBeenCalledTimes(2 + 1)
     })
   })
 
@@ -53,6 +56,7 @@ describe(`Process nodes correctly`, () => {
     const actions = { createNode, createParentChildLink }
     const createNodeId = jest.fn()
     createNodeId.mockReturnValue(`uuid-from-gatsby`)
+    const createDigestContent = jest.fn().mockReturnValue(`contentDigest`)
 
     await onCreateNode(
       {
@@ -60,6 +64,7 @@ describe(`Process nodes correctly`, () => {
         loadNodeContent,
         actions,
         createNodeId,
+        createDigestContent,
       },
       { raw: false }
     ).then(() => {
@@ -67,6 +72,7 @@ describe(`Process nodes correctly`, () => {
       expect(createParentChildLink.mock.calls).toMatchSnapshot()
       expect(createNode).toHaveBeenCalledTimes(2 + 1)
       expect(createParentChildLink).toHaveBeenCalledTimes(2 + 1)
+      expect(createDigestContent).toHaveBeenCalledTimes(2 + 1)
     })
   })
 
@@ -80,6 +86,7 @@ describe(`Process nodes correctly`, () => {
     const actions = { createNode, createParentChildLink }
     const createNodeId = jest.fn()
     createNodeId.mockReturnValue(`uuid-from-gatsby`)
+    const createDigestContent = jest.fn().mockReturnValue(`contentDigest`)
 
     await onCreateNode(
       {
@@ -87,6 +94,7 @@ describe(`Process nodes correctly`, () => {
         loadNodeContent,
         actions,
         createNodeId,
+        createDigestContent,
       },
       { rawOutput: false }
     ).then(() => {
@@ -94,6 +102,7 @@ describe(`Process nodes correctly`, () => {
       expect(createParentChildLink.mock.calls).toMatchSnapshot()
       expect(createNode).toHaveBeenCalledTimes(2 + 1)
       expect(createParentChildLink).toHaveBeenCalledTimes(2 + 1)
+      expect(createDigestContent).toHaveBeenCalledTimes(2 + 1)
     })
   })
 })
diff --git a/packages/gatsby-transformer-excel/src/gatsby-node.js b/packages/gatsby-transformer-excel/src/gatsby-node.js
index eb537e6e24719..cb36ecae5cc7e 100644
--- a/packages/gatsby-transformer-excel/src/gatsby-node.js
+++ b/packages/gatsby-transformer-excel/src/gatsby-node.js
@@ -1,7 +1,6 @@
 const XLSX = require(`xlsx`)
 const fs = require(`fs-extra`)
 const _ = require(`lodash`)
-const crypto = require(`crypto`)
 
 // read files as `binary` from file system
 function _loadNodeContent(fileNode, fallback) {
@@ -11,7 +10,7 @@ function _loadNodeContent(fileNode, fallback) {
 }
 
 async function onCreateNode(
-  { node, actions, loadNodeContent, createNodeId },
+  { node, actions, loadNodeContent, createNodeId, createDigestContent },
   options = {}
 ) {
   const { createNode, createParentChildLink } = actions
@@ -45,12 +44,7 @@ async function onCreateNode(
 
     if (_.isArray(parsedContent)) {
       const csvArray = parsedContent.map((obj, i) => {
-        const objStr = JSON.stringify(obj)
-        const contentDigest = crypto
-          .createHash(`md5`)
-          .update(objStr)
-          .digest(`hex`)
-
+        const contentDigest = createDigestContent(obj)
         return {
           ...obj,
           id: obj.id
@@ -74,12 +68,7 @@ async function onCreateNode(
       })
 
       const shObj = { name: n, idx: idx }
-      const shStr = JSON.stringify(shObj)
-      const contentDigest = crypto
-        .createHash(`md5`)
-        .update(shStr)
-        .digest(`hex`)
-
+      const contentDigest = createDigestContent(shObj)
       const z = {
         id: createNodeId(`${node.id} [${idx}] >>> ${node.extension}`),
         children: [],