diff --git a/packages/shrinkwrap/src/satisfiesPackageJson.ts b/packages/shrinkwrap/src/satisfiesPackageJson.ts
index 30df18e2da..2507b34197 100644
--- a/packages/shrinkwrap/src/satisfiesPackageJson.ts
+++ b/packages/shrinkwrap/src/satisfiesPackageJson.ts
@@ -1,4 +1,7 @@
-import {PackageJson} from '@pnpm/types'
+import {
+  DEPENDENCIES_FIELDS,
+  PackageJson,
+} from '@pnpm/types'
 import R = require('ramda')
 import {
   Shrinkwrap,
@@ -8,20 +11,22 @@ export default (shr: Shrinkwrap, pkg: PackageJson) => {
   if (!R.equals({...pkg.devDependencies, ...pkg.dependencies, ...pkg.optionalDependencies}, shr.specifiers)) {
     return false
   }
-  for (const depType of ['optionalDependencies', 'dependencies', 'devDependencies']) {
-    const emptyDep = R.isEmpty(R.keys(pkg[depType]))
-    if (emptyDep !== R.isEmpty(R.keys(shr[depType]))) return false
+  for (const depField of DEPENDENCIES_FIELDS) {
+    const shrDeps = shr[depField] || {}
+    const pkgDeps = pkg[depField] || {}
+    const emptyDep = R.isEmpty(pkgDeps)
+    if (emptyDep !== R.isEmpty(shrDeps)) return false
     if (emptyDep) continue
 
-    const pkgDepNames = depType === 'optionalDependencies'
-      ? Object.keys(pkg.optionalDependencies || {})
-      : Object.keys(pkg[depType]).filter((depName) => !pkg.optionalDependencies || !pkg.optionalDependencies[depName])
-    if (pkgDepNames.length !== Object.keys(shr[depType]).length &&
-      pkgDepNames.length !== countOfNonLinkedDeps(shr[depType])) {
+    const pkgDepNames = depField === 'optionalDependencies'
+      ? Object.keys(pkgDeps)
+      : Object.keys(pkgDeps).filter((depName) => !pkg.optionalDependencies || !pkg.optionalDependencies[depName])
+    if (pkgDepNames.length !== R.keys(shrDeps).length &&
+      pkgDepNames.length !== countOfNonLinkedDeps(shrDeps)) {
         return false
       }
     for (const depName of pkgDepNames) {
-      if (!shr[depType][depName] || shr.specifiers[depName] !== pkg[depType][depName]) return false
+      if (!shrDeps[depName] || shr.specifiers[depName] !== pkgDeps[depName]) return false
     }
   }
   return true
diff --git a/packages/supi/src/api/install.ts b/packages/supi/src/api/install.ts
index 7766c27bc0..c2159acc5f 100644
--- a/packages/supi/src/api/install.ts
+++ b/packages/supi/src/api/install.ts
@@ -17,10 +17,10 @@ import {
 } from '@pnpm/resolver-base'
 import {
   Dependencies,
+  DEPENDENCIES_FIELDS,
   PackageJson,
 } from '@pnpm/types'
 import {
-  dependenciesTypes,
   getSaveType,
   realNodeModulesDir,
   safeReadPackageFromDir as safeReadPkgFromDir,
@@ -286,14 +286,16 @@ async function linkedPackagesSatisfyPackageJson (
   localPackages?: LocalPackages,
 ) {
   const localPackagesByDirectory = localPackages ? getLocalPackagesByDirectory(localPackages) : {}
-  for (const depType of ['optionalDependencies', 'dependencies', 'devDependencies']) {
-    if (!shr[depType] || !pkg[depType]) continue
-    const depNames = Object.keys(shr[depType])
+  for (const depField of DEPENDENCIES_FIELDS) {
+    const shrDeps = shr[depField]
+    const pkgDeps = pkg[depField]
+    if (!shrDeps || !pkgDeps) continue
+    const depNames = Object.keys(shrDeps)
     for (const depName of depNames) {
-      if (!shr[depType][depName].startsWith('link:') || !pkg[depType][depName]) continue
-      const dir = path.join(prefix, shr[depType][depName].substr(5))
+      if (!shrDeps[depName].startsWith('link:') || !pkgDeps[depName]) continue
+      const dir = path.join(prefix, shrDeps[depName].substr(5))
       const linkedPkg = localPackagesByDirectory[dir] || await safeReadPkgFromDir(dir)
-      if (!linkedPkg || !semver.satisfies(linkedPkg.version, pkg[depType][depName])) return false
+      if (!linkedPkg || !semver.satisfies(linkedPkg.version, pkgDeps[depName])) return false
     }
   }
   return true
@@ -877,7 +879,7 @@ function alignDependencyTypes (pkg: PackageJson, shr: Shrinkwrap) {
   const depTypesOfAliases = getAliasToDependencyTypeMap(pkg)
 
   // Aligning the dependency types in shrinkwrap.yaml
-  for (const depType of dependenciesTypes) {
+  for (const depType of DEPENDENCIES_FIELDS) {
     if (!shr[depType]) continue
     for (const alias of Object.keys(shr[depType] || {})) {
       if (depType === depTypesOfAliases[alias] || !depTypesOfAliases[alias]) continue
@@ -889,7 +891,7 @@ function alignDependencyTypes (pkg: PackageJson, shr: Shrinkwrap) {
 
 function getAliasToDependencyTypeMap (pkg: PackageJson) {
   const depTypesOfAliases = {}
-  for (const depType of dependenciesTypes) {
+  for (const depType of DEPENDENCIES_FIELDS) {
     if (!pkg[depType]) continue
     for (const alias of Object.keys(pkg[depType] || {})) {
       if (!depTypesOfAliases[alias]) {
diff --git a/packages/supi/src/api/link.ts b/packages/supi/src/api/link.ts
index 379344e9d7..094db4f563 100644
--- a/packages/supi/src/api/link.ts
+++ b/packages/supi/src/api/link.ts
@@ -7,10 +7,12 @@ import {
 import { linkBinsOfPackages } from '@pnpm/link-bins'
 import logger, { streamParser } from '@pnpm/logger'
 import { read as readModulesYaml } from '@pnpm/modules-yaml'
-import { PackageJson } from '@pnpm/types'
 import {
-  DependenciesType,
-  dependenciesTypes,
+  DEPENDENCIES_FIELDS,
+  DependenciesField,
+  PackageJson,
+} from '@pnpm/types'
+import {
   getSaveType,
   removeOrphanPackages as removeOrphanPkgs,
   safeReadPackage,
@@ -64,7 +66,7 @@ export default async function link (
     })
   }
   const linkedPkgs: Array<{path: string, pkg: PackageJson, alias: string}> = []
-  const specsToUpsert = [] as Array<{name: string, pref: string, saveType: DependenciesType}>
+  const specsToUpsert = [] as Array<{name: string, pref: string, saveType: DependenciesField}>
   const saveType = getSaveType(opts)
 
   for (const linkFrom of linkFromPkgs) {
@@ -83,7 +85,7 @@ export default async function link (
         saveExact: opts.saveExact,
         savePrefix: opts.savePrefix,
       }),
-      saveType: (saveType || pkg && guessDependencyType(linkedPkg.name, pkg)) as DependenciesType,
+      saveType: (saveType || pkg && guessDependencyType(linkedPkg.name, pkg)) as DependenciesField,
     })
 
     const packagePath = normalize(path.relative(opts.prefix, linkFromPath))
@@ -164,8 +166,8 @@ function addLinkToShrinkwrap (
   },
 ) {
   const id = `link:${opts.packagePath}`
-  let addedTo: DependenciesType | undefined
-  for (const depType of dependenciesTypes) {
+  let addedTo: DependenciesField | undefined
+  for (const depType of DEPENDENCIES_FIELDS) {
     if (!addedTo && opts.pkg && opts.pkg[depType] && opts.pkg[depType]![opts.linkedPkgName]) {
       addedTo = depType
       shr[depType] = shr[depType] || {}
@@ -203,7 +205,7 @@ async function linkToModules (
     packageDir: string,
     pkg: PackageJson,
     destModulesDir: string,
-    saveType?: DependenciesType,
+    saveType?: DependenciesField,
     prefix: string,
   },
 ) {
diff --git a/packages/supi/src/removeDeps.ts b/packages/supi/src/removeDeps.ts
index ca702902cd..ef4268faa2 100644
--- a/packages/supi/src/removeDeps.ts
+++ b/packages/supi/src/removeDeps.ts
@@ -1,9 +1,9 @@
 import { packageJsonLogger } from '@pnpm/core-loggers'
-import { PackageJson } from '@pnpm/types'
 import {
-  DependenciesType,
-  dependenciesTypes,
-} from '@pnpm/utils'
+  DEPENDENCIES_FIELDS,
+  DependenciesField,
+  PackageJson,
+} from '@pnpm/types'
 import loadJsonFile = require('load-json-file')
 import writePkg = require('write-pkg')
 
@@ -11,7 +11,7 @@ export default async function (
   pkgJsonPath: string,
   removedPackages: string[],
   opts: {
-    saveType?: DependenciesType,
+    saveType?: DependenciesField,
     prefix: string,
   },
 ): Promise<PackageJson> {
@@ -23,14 +23,14 @@ export default async function (
     if (!packageJson[opts.saveType]) return packageJson
 
     removedPackages.forEach((dependency) => {
-      delete packageJson[opts.saveType as DependenciesType][dependency]
+      delete packageJson[opts.saveType as DependenciesField][dependency]
     })
   } else {
-    dependenciesTypes
-      .filter((deptype) => packageJson[deptype])
-      .forEach((deptype) => {
+    DEPENDENCIES_FIELDS
+      .filter((depField) => packageJson[depField])
+      .forEach((depField) => {
         removedPackages.forEach((dependency) => {
-          delete packageJson[deptype][dependency]
+          delete packageJson[depField][dependency]
         })
       })
   }
diff --git a/packages/supi/src/save.ts b/packages/supi/src/save.ts
index 3234f400a8..d9a5bf08f0 100644
--- a/packages/supi/src/save.ts
+++ b/packages/supi/src/save.ts
@@ -1,9 +1,9 @@
 import { packageJsonLogger } from '@pnpm/core-loggers'
-import { PackageJson } from '@pnpm/types'
 import {
-  DependenciesType,
-  dependenciesTypes,
-} from '@pnpm/utils'
+  DEPENDENCIES_FIELDS,
+  DependenciesField,
+  PackageJson,
+} from '@pnpm/types'
 import loadJsonFile = require('load-json-file')
 import path = require('path')
 import writePkg = require('write-pkg')
@@ -13,7 +13,7 @@ export default async function save (
   packageSpecs: Array<{
     name: string,
     pref?: string,
-    saveType?: DependenciesType,
+    saveType?: DependenciesField,
   }>,
 ): Promise<PackageJson> {
   // Read the latest version of package.json to avoid accidental overwriting
@@ -31,7 +31,7 @@ export default async function save (
       packageJson[packageSpec.saveType] = packageJson[packageSpec.saveType] || {}
       packageSpecs.forEach((dependency) => {
         packageJson[saveType][dependency.name] = dependency.pref || findSpec(dependency.name, packageJson as PackageJson)
-        dependenciesTypes.filter((deptype) => deptype !== packageSpec.saveType).forEach((deptype) => {
+        DEPENDENCIES_FIELDS.filter((depField) => depField !== packageSpec.saveType).forEach((deptype) => {
           if (packageJson[deptype]) {
             delete packageJson[deptype][dependency.name]
           }
@@ -59,7 +59,7 @@ function findSpec (depName: string, pkg: PackageJson): string | undefined {
   return foundDepType && pkg[foundDepType]![depName]
 }
 
-export function guessDependencyType (depName: string, pkg: PackageJson): DependenciesType | undefined {
-  return dependenciesTypes
-    .find((deptype) => Boolean(pkg[deptype] && pkg[deptype]![depName]))
+export function guessDependencyType (depName: string, pkg: PackageJson): DependenciesField | undefined {
+  return DEPENDENCIES_FIELDS
+    .find((depField) => Boolean(pkg[depField] && pkg[depField]![depName]))
 }
diff --git a/packages/utils/src/getSaveType.ts b/packages/utils/src/getSaveType.ts
index 6bc656a6f3..8ae0b086f7 100644
--- a/packages/utils/src/getSaveType.ts
+++ b/packages/utils/src/getSaveType.ts
@@ -1,9 +1,6 @@
-import {PnpmOptions} from '@pnpm/types'
-export type DependenciesType = 'dependencies' | 'devDependencies' | 'optionalDependencies'
+import { DependenciesField, PnpmOptions } from '@pnpm/types'
 
-export const dependenciesTypes: DependenciesType[] = ['optionalDependencies', 'dependencies', 'devDependencies']
-
-export default function getSaveType (opts: PnpmOptions): DependenciesType | undefined {
+export default function getSaveType (opts: PnpmOptions): DependenciesField | undefined {
   if (opts.saveDev) return 'devDependencies'
   if (opts.saveOptional) return 'optionalDependencies'
   if (opts.saveProd) return 'dependencies'
diff --git a/packages/utils/src/index.ts b/packages/utils/src/index.ts
index c76f67423f..860ac84029 100644
--- a/packages/utils/src/index.ts
+++ b/packages/utils/src/index.ts
@@ -1,4 +1,4 @@
-import getSaveType, {DependenciesType, dependenciesTypes} from './getSaveType'
+import getSaveType from './getSaveType'
 import realNodeModulesDir from './realNodeModulesDir'
 import removeOrphanPackages from './removeOrphanPkgs'
 import removeTopDependency from './removeTopDependency'
@@ -7,8 +7,6 @@ import {fromDir as safeReadPackageFromDir} from './safeReadPkg'
 import readPackage from './safeReadPkg'
 
 export {
-  DependenciesType,
-  dependenciesTypes,
   getSaveType,
   readPackage,
   realNodeModulesDir,
diff --git a/packages/utils/src/removeOrphanPkgs.ts b/packages/utils/src/removeOrphanPkgs.ts
index df6f322e9a..124e7f4a3c 100644
--- a/packages/utils/src/removeOrphanPkgs.ts
+++ b/packages/utils/src/removeOrphanPkgs.ts
@@ -3,14 +3,14 @@ import {
   statsLogger,
 } from '@pnpm/core-loggers'
 import logger from '@pnpm/logger'
+import { DEPENDENCIES_FIELDS } from '@pnpm/types'
 import * as dp from 'dependency-path'
 import vacuumCB = require('fs-vacuum')
-import {StoreController} from 'package-store'
+import { StoreController } from 'package-store'
 import path = require('path')
-import {ResolvedPackages, Shrinkwrap} from 'pnpm-shrinkwrap'
+import { ResolvedPackages, Shrinkwrap } from 'pnpm-shrinkwrap'
 import R = require('ramda')
 import promisify = require('util.promisify')
-import {dependenciesTypes} from './getSaveType'
 import removeTopDependency from './removeTopDependency'
 
 const vacuum = promisify(vacuumCB)
@@ -28,8 +28,8 @@ export default async function removeOrphanPkgs (
     storeController: StoreController,
   },
 ): Promise<Set<string>> {
-  const oldPkgs = R.toPairs(R.mergeAll(R.map((depType) => opts.oldShrinkwrap[depType], dependenciesTypes)))
-  const newPkgs = R.toPairs(R.mergeAll(R.map((depType) => opts.newShrinkwrap[depType], dependenciesTypes)))
+  const oldPkgs = R.toPairs(R.mergeAll(R.map((depType) => opts.oldShrinkwrap[depType], DEPENDENCIES_FIELDS)))
+  const newPkgs = R.toPairs(R.mergeAll(R.map((depType) => opts.newShrinkwrap[depType], DEPENDENCIES_FIELDS)))
 
   const removedTopDeps: Array<[string, string]> = R.difference(oldPkgs, newPkgs) as Array<[string, string]>