diff --git a/types/karma-chai-sinon/index.d.ts b/types/karma-chai-sinon/index.d.ts
index 76ee313a40..1ce2672b23 100644
--- a/types/karma-chai-sinon/index.d.ts
+++ b/types/karma-chai-sinon/index.d.ts
@@ -2,7 +2,7 @@
 // Project: https://github.com/tubalmartin/karma-chai-sinon
 // Definitions by: Václav Ostrožlík <https://github.com/vasek17>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
-// TypeScript Version: 2.3
+// TypeScript Version: 2.8
 
 /// <reference types="chai" />
 import Sinon = require("sinon");
diff --git a/types/mochaccino/index.d.ts b/types/mochaccino/index.d.ts
index b230218ee9..3f0a2e9688 100644
--- a/types/mochaccino/index.d.ts
+++ b/types/mochaccino/index.d.ts
@@ -2,7 +2,7 @@
 // Project: https://github.com/pawelgalazka/mochaccino#readme
 // Definitions by: Thomas-P <https://github.com/thomas-p>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.3
+// TypeScript Version: 2.8
 import * as Sinon from "sinon";
 export interface Expect {
     not: Expect;
diff --git a/types/should-sinon/index.d.ts b/types/should-sinon/index.d.ts
index 25233c1c61..467d217aa9 100644
--- a/types/should-sinon/index.d.ts
+++ b/types/should-sinon/index.d.ts
@@ -2,7 +2,7 @@
 // Project: https://github.com/shouldjs/sinon
 // Definitions by: AryloYeung <https://github.com/Arylo>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.3
+// TypeScript Version: 2.8
 
 import * as s from "sinon";
 import should = require("should");
diff --git a/types/sinon-as-promised/index.d.ts b/types/sinon-as-promised/index.d.ts
index 097e13a1a0..49e9b29bd3 100644
--- a/types/sinon-as-promised/index.d.ts
+++ b/types/sinon-as-promised/index.d.ts
@@ -2,7 +2,7 @@
 // Project: https://github.com/bendrucker/sinon-as-promised
 // Definitions by: igrayson <https://github.com/igrayson>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.3
+// TypeScript Version: 2.8
 
 import * as s from "sinon";
 
diff --git a/types/sinon-chai/index.d.ts b/types/sinon-chai/index.d.ts
index 8c6d7eb2d0..cff6d0b3a2 100644
--- a/types/sinon-chai/index.d.ts
+++ b/types/sinon-chai/index.d.ts
@@ -2,7 +2,7 @@
 // Project: https://github.com/domenic/sinon-chai
 // Definitions by: Kazi Manzur Rashid <https://github.com/kazimanzurrashid>, Jed Mao <https://github.com/jedmao>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.3
+// TypeScript Version: 2.8
 
 /// <reference types="chai" />
 /// <reference types="sinon" />
diff --git a/types/sinon-chrome/index.d.ts b/types/sinon-chrome/index.d.ts
index 263135e060..9776b0bb30 100644
--- a/types/sinon-chrome/index.d.ts
+++ b/types/sinon-chrome/index.d.ts
@@ -4,7 +4,7 @@
 //                 CRIMX <https://github.com/crimx>
 //                 kobanyan <https://github.com/kobanyan>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.4
+// TypeScript Version: 2.8
 
 /// <reference types="chrome"/>
 /// <reference types="sinon"/>
diff --git a/types/sinon-express-mock/index.d.ts b/types/sinon-express-mock/index.d.ts
index 10c8ef824d..f3974fc005 100644
--- a/types/sinon-express-mock/index.d.ts
+++ b/types/sinon-express-mock/index.d.ts
@@ -3,7 +3,7 @@
 // Definitions by: Jared Chapiewsky <https://github.com/jpchip>
 //                 Tomek Łaziuk <https://github.com/tlaziuk>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.3
+// TypeScript Version: 2.8
 
 import {
     SinonStub,
diff --git a/types/sinon-mongoose/index.d.ts b/types/sinon-mongoose/index.d.ts
index 2d9099a060..86109b4917 100644
--- a/types/sinon-mongoose/index.d.ts
+++ b/types/sinon-mongoose/index.d.ts
@@ -2,7 +2,7 @@
 // Project: https://github.com/underscopeio/sinon-mongoose
 // Definitions by: stevehipwell <https://github.com/stevehipwell>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.3
+// TypeScript Version: 2.8
 
 import * as s from "sinon";
 
diff --git a/types/sinon-stub-promise/index.d.ts b/types/sinon-stub-promise/index.d.ts
index 6de3b17b2a..d817113cf7 100644
--- a/types/sinon-stub-promise/index.d.ts
+++ b/types/sinon-stub-promise/index.d.ts
@@ -3,7 +3,7 @@
 // Definitions by: Thiago Temple <https://github.com/vintem>
 //                 Tim Stackhouse <https://github.com/tstackhouse>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.3
+// TypeScript Version: 2.8
 
 /// <reference types="sinon"/>
 
diff --git a/types/sinon-test/index.d.ts b/types/sinon-test/index.d.ts
index 4cda8702a6..902064a7cb 100644
--- a/types/sinon-test/index.d.ts
+++ b/types/sinon-test/index.d.ts
@@ -2,7 +2,7 @@
 // Project: https://github.com/sinonjs/sinon-test
 // Definitions by: Francis Saul <https://github.com/mummybot>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.3
+// TypeScript Version: 2.8
 
 import * as Sinon from 'sinon';
 
diff --git a/types/sinon/index.d.ts b/types/sinon/index.d.ts
index 2395ee2ed2..0bc7d112fc 100644
--- a/types/sinon/index.d.ts
+++ b/types/sinon/index.d.ts
@@ -5,8 +5,9 @@
 //                 Lukas Spieß <https://github.com/lumaxis>
 //                 Nico Jansen <https://github.com/nicojs>
 //                 James Garbutt <https://github.com/43081j>
+//                 Josh Goldberg <https://github.com/joshuakgoldberg>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
-// TypeScript Version: 2.3
+// TypeScript Version: 2.8
 
 // sinon uses DOM dependencies which are absent in browser-less environment like node.js
 // to avoid compiler errors this monkey patch is used
@@ -566,15 +567,20 @@ declare namespace Sinon {
     }
 
     /**
-     * An instance of a stubbed object type with members replaced by stubs.
+     * An instance of a stubbed object type with functions replaced by stubs.
      *
      * @template TType Object type being stubbed.
      */
     type SinonStubbedInstance<TType> = {
         // TODO: this should really only replace functions on TType with SinonStubs, not all properties
         // Likely infeasible without mapped conditional types, per https://github.com/Microsoft/TypeScript/issues/12424
-        [P in keyof TType]: SinonStub;
+        [P in keyof TType]: SinonStubbedMember<TType[P]>;
     };
+
+    /**
+     * Replaces a type with a Sinon stub if it's a function.
+     */
+    type SinonStubbedMember<T> = T extends Function ? SinonStub : T;
 }
 
 declare const Sinon: Sinon.SinonStatic;
diff --git a/types/sinon/sinon-tests.ts b/types/sinon/sinon-tests.ts
index 17e8cc6084..c6ffc7a51e 100644
--- a/types/sinon/sinon-tests.ts
+++ b/types/sinon/sinon-tests.ts
@@ -154,6 +154,15 @@ function testSandbox() {
     sandbox.createStubInstance<TestCreateStubInstance>(TestCreateStubInstance).someTestMethod('some argument');
 }
 
+class OneFunctionOneNumber {
+    memberFunction() { }
+    memberNumber: number;
+}
+
+const stubInstance = sinon.createStubInstance<OneFunctionOneNumber>(OneFunctionOneNumber);
+const memberFunction: sinon.SinonStub = stubInstance.memberFunction;
+const memberNumber: number = stubInstance.memberNumber;
+
 function testPromises() {
     let resolveStub = sinon.stub().resolves();
     resolveStub = sinon.stub().resolves(10);