diff --git a/.gitignore b/.gitignore
index 915aafb5b..2d7c79c25 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,4 @@ dist/
 *.iml
 *.ipr
 *.iws
+yarn-error.log
diff --git a/CHANGELOG.md b/CHANGELOG.md
index a7487b751..7e69e7198 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,8 @@
 
+# 3.6.2
+
+* Fixed accidental dependency on the `node` typings. Fixes [#1387](https://github.com/mobxjs/mobx/issues/1387) / [#1362](https://github.com/mobxjs/mobx/issues/1387)
+
 # 3.6.1
 
 * Fixed [#1358](https://github.com/mobxjs/mobx/pull/1359): Deep comparison failing on IE11. By [le0nik](https://github.com/le0nik) through [#1359](https://github.com/mobxjs/mobx/pull/1359)
diff --git a/src/api/autorun.ts b/src/api/autorun.ts
index 8f646ba6c..87b246967 100644
--- a/src/api/autorun.ts
+++ b/src/api/autorun.ts
@@ -231,7 +231,7 @@ export function reaction<T>(
             setTimeout(() => {
                 isScheduled = false
                 reactionRunner()
-            }, opts.delay)
+            }, opts.delay!)
         }
     })
 
diff --git a/src/core/globalstate.ts b/src/core/globalstate.ts
index d74190e97..36fda2dff 100644
--- a/src/core/globalstate.ts
+++ b/src/core/globalstate.ts
@@ -105,7 +105,7 @@ let warnedAboutMultipleInstances = false
                     "[mobx] Warning: there are multiple mobx instances active. This might lead to unexpected results. See https://github.com/mobxjs/mobx/issues/1082 for details."
                 )
             }
-        })
+        }, 1)
     }
 }
 
diff --git a/src/utils/eq.ts b/src/utils/eq.ts
index 9445b783d..d0438d37d 100644
--- a/src/utils/eq.ts
+++ b/src/utils/eq.ts
@@ -2,12 +2,14 @@ import { areBothNaN, isArrayLike, isES6Map, iteratorToArray } from "./utils"
 import { observable } from "../api/observable"
 import { isObservableArray, isObservableMap } from "../mobx"
 
-// Copied from https://github.com/jashkenas/underscore/blob/5c237a7c682fb68fd5378203f0bf22dce1624854/underscore.js#L1186-L1289
+declare var Symbol
+const toString = Object.prototype.toString
 
 export function deepEqual(a, b): boolean {
     return eq(a, b)
 }
 
+// Copied from https://github.com/jashkenas/underscore/blob/5c237a7c682fb68fd5378203f0bf22dce1624854/underscore.js#L1186-L1289
 // Internal recursive comparison function for `isEqual`.
 function eq(a, b, aStack?, bStack?) {
     // Identical objects are equal. `0 === -0`, but they aren't identical.
@@ -23,8 +25,6 @@ function eq(a, b, aStack?, bStack?) {
     return deepEq(a, b, aStack, bStack)
 }
 
-const toString = Object.prototype.toString
-
 // Internal recursive comparison function for `isEqual`.
 function deepEq(a, b, aStack?, bStack?) {
     // Unwrap any wrapped objects.
diff --git a/src/utils/utils.ts b/src/utils/utils.ts
index 1beafe597..a4e0f6e76 100644
--- a/src/utils/utils.ts
+++ b/src/utils/utils.ts
@@ -1,7 +1,8 @@
 export const EMPTY_ARRAY = []
 Object.freeze(EMPTY_ARRAY)
 
-declare var global
+declare var window, global, Symbol
+
 export function getGlobal() {
     return typeof window !== "undefined" ? window : global
 }
@@ -182,8 +183,6 @@ export function iteratorToArray<T>(it: Iterator<T>): ReadonlyArray<T> {
     return res
 }
 
-declare var Symbol
-
 export function primitiveSymbol() {
     return (typeof Symbol === "function" && Symbol.toPrimitive) || "@@toPrimitive"
 }
@@ -196,3 +195,4 @@ import { globalState } from "../core/globalstate"
 import { IObservableArray, isObservableArray } from "../types/observablearray"
 import { isObservableMap, ObservableMap, IKeyValueMap } from "../types/observablemap"
 import { observable } from "../api/observable"
+import { Iterator } from "./iterable"
diff --git a/tsconfig.json b/tsconfig.json
index 3d4f2cc45..cf4b5c3ce 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -13,8 +13,7 @@
         "noImplicitAny": false,
         "moduleResolution": "node",
         "lib": [
-            "es5",
-            "dom"
+            "es5"
         ]
     },
     "include": [