diff --git a/.all-contributorsrc b/.all-contributorsrc
index f931302a..a371d8b4 100644
--- a/.all-contributorsrc
+++ b/.all-contributorsrc
@@ -31,6 +31,26 @@
         "test"
       ]
     },
+    {
+      "login": "sgrishchenko",
+      "name": "Sergei Grishchenko",
+      "avatar_url": "https://avatars3.githubusercontent.com/u/15995890?v=4",
+      "profile": "https://github.com/sgrishchenko",
+      "contributions": [
+        "code",
+        "test"
+      ]
+    },
+    {
+      "login": "Andarist",
+      "name": "Mateusz Burzyński",
+      "avatar_url": "https://avatars2.githubusercontent.com/u/9800850?v=4",
+      "profile": "https://github.com/Andarist",
+      "contributions": [
+        "code",
+        "infra"
+      ]
+    },
     {
       "login": "olslash",
       "name": "Mitch Robb",
@@ -178,16 +198,6 @@
         "doc"
       ]
     },
-    {
-      "login": "Andarist",
-      "name": "Mateusz Burzyński",
-      "avatar_url": "https://avatars2.githubusercontent.com/u/9800850?v=4",
-      "profile": "https://github.com/Andarist",
-      "contributions": [
-        "code",
-        "infra"
-      ]
-    },
     {
       "login": "el-dav",
       "name": "el-dav",
@@ -197,16 +207,6 @@
         "bug"
       ]
     },
-    {
-      "login": "sgrishchenko",
-      "name": "Sergei Grishchenko",
-      "avatar_url": "https://avatars3.githubusercontent.com/u/15995890?v=4",
-      "profile": "https://github.com/sgrishchenko",
-      "contributions": [
-        "code",
-        "test"
-      ]
-    },
     {
       "login": "augnustin",
       "name": "Augustin Riedinger",
diff --git a/CHANGELOG.md b/CHANGELOG.md
index b1644b51..6468ba11 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
 # Change log
 
+## 3.1.0
+
+### New Features
+
+- Expose `keySelector` property
+
 ## 3.0.0
 
 ### Breaking Changes
diff --git a/README.md b/README.md
index 5ad04da7..8e5678a1 100644
--- a/README.md
+++ b/README.md
@@ -460,10 +460,10 @@ Thanks to you all ([emoji key][docs-all-contributors]):
 
 <!-- ALL-CONTRIBUTORS-LIST:START - Do not remove or modify this section -->
 <!-- prettier-ignore -->
-| [<img src="https://avatars3.githubusercontent.com/u/4573549?v=4" width="100px;"/><br /><sub><b>Andrea Carraro</b></sub>](http://www.andreacarraro.it)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=toomuchdesign "Code") [📖](https://github.com/toomuchdesign/re-reselect/commits?author=toomuchdesign "Documentation") [🚇](#infra-toomuchdesign "Infrastructure (Hosting, Build-Tools, etc)") [⚠️](https://github.com/toomuchdesign/re-reselect/commits?author=toomuchdesign "Tests") [👀](#review-toomuchdesign "Reviewed Pull Requests") | [<img src="https://avatars2.githubusercontent.com/u/830824?v=4" width="100px;"/><br /><sub><b>Stepan Burguchev</b></sub>](https://github.com/xsburg)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=xsburg "Code") [👀](#review-xsburg "Reviewed Pull Requests") [⚠️](https://github.com/toomuchdesign/re-reselect/commits?author=xsburg "Tests") | [<img src="https://avatars3.githubusercontent.com/u/693493?v=4" width="100px;"/><br /><sub><b>Mitch Robb</b></sub>](https://olslash.github.io/)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=olslash "Code") [⚠️](https://github.com/toomuchdesign/re-reselect/commits?author=olslash "Tests") | [<img src="https://avatars3.githubusercontent.com/u/1128559?v=4" width="100px;"/><br /><sub><b>Stephane Rufer</b></sub>](https://github.com/rufman)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=rufman "Code") [⚠️](https://github.com/toomuchdesign/re-reselect/commits?author=rufman "Tests") | [<img src="https://avatars0.githubusercontent.com/u/2788860?v=4" width="100px;"/><br /><sub><b>Tracy Mullen</b></sub>](https://github.com/spiffysparrow)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=spiffysparrow "Code") [⚠️](https://github.com/toomuchdesign/re-reselect/commits?author=spiffysparrow "Tests") | [<img src="https://avatars1.githubusercontent.com/u/4211838?v=4" width="100px;"/><br /><sub><b>Sushain Cherivirala</b></sub>](https://www.skc.name)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=sushain97 "Code") | [<img src="https://avatars0.githubusercontent.com/u/6316590?v=4" width="100px;"/><br /><sub><b>Steve Mao</b></sub>](https://twitter.com/MaoStevemao)<br />[📖](https://github.com/toomuchdesign/re-reselect/commits?author=stevemao "Documentation") |
+| [<img src="https://avatars3.githubusercontent.com/u/4573549?v=4" width="100px;"/><br /><sub><b>Andrea Carraro</b></sub>](http://www.andreacarraro.it)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=toomuchdesign "Code") [📖](https://github.com/toomuchdesign/re-reselect/commits?author=toomuchdesign "Documentation") [🚇](#infra-toomuchdesign "Infrastructure (Hosting, Build-Tools, etc)") [⚠️](https://github.com/toomuchdesign/re-reselect/commits?author=toomuchdesign "Tests") [👀](#review-toomuchdesign "Reviewed Pull Requests") | [<img src="https://avatars2.githubusercontent.com/u/830824?v=4" width="100px;"/><br /><sub><b>Stepan Burguchev</b></sub>](https://github.com/xsburg)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=xsburg "Code") [👀](#review-xsburg "Reviewed Pull Requests") [⚠️](https://github.com/toomuchdesign/re-reselect/commits?author=xsburg "Tests") | [<img src="https://avatars3.githubusercontent.com/u/15995890?v=4" width="100px;"/><br /><sub><b>Sergei Grishchenko</b></sub>](https://github.com/sgrishchenko)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=sgrishchenko "Code") [⚠️](https://github.com/toomuchdesign/re-reselect/commits?author=sgrishchenko "Tests") | [<img src="https://avatars2.githubusercontent.com/u/9800850?v=4" width="100px;"/><br /><sub><b>Mateusz Burzyński</b></sub>](https://github.com/Andarist)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=Andarist "Code") [🚇](#infra-Andarist "Infrastructure (Hosting, Build-Tools, etc)") | [<img src="https://avatars3.githubusercontent.com/u/693493?v=4" width="100px;"/><br /><sub><b>Mitch Robb</b></sub>](https://olslash.github.io/)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=olslash "Code") [⚠️](https://github.com/toomuchdesign/re-reselect/commits?author=olslash "Tests") | [<img src="https://avatars3.githubusercontent.com/u/1128559?v=4" width="100px;"/><br /><sub><b>Stephane Rufer</b></sub>](https://github.com/rufman)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=rufman "Code") [⚠️](https://github.com/toomuchdesign/re-reselect/commits?author=rufman "Tests") | [<img src="https://avatars0.githubusercontent.com/u/2788860?v=4" width="100px;"/><br /><sub><b>Tracy Mullen</b></sub>](https://github.com/spiffysparrow)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=spiffysparrow "Code") [⚠️](https://github.com/toomuchdesign/re-reselect/commits?author=spiffysparrow "Tests") |
 | :---: | :---: | :---: | :---: | :---: | :---: | :---: |
-| [<img src="https://avatars2.githubusercontent.com/u/1428826?v=4" width="100px;"/><br /><sub><b>Gaurav Lahoti</b></sub>](https://github.com/Dante-101)<br />[🐛](https://github.com/toomuchdesign/re-reselect/issues?q=author%3ADante-101 "Bug reports") | [<img src="https://avatars3.githubusercontent.com/u/13602053?v=4" width="100px;"/><br /><sub><b>Lon</b></sub>](http://lon.im)<br />[🐛](https://github.com/toomuchdesign/re-reselect/issues?q=author%3Acnlon "Bug reports") | [<img src="https://avatars2.githubusercontent.com/u/5492495?v=4" width="100px;"/><br /><sub><b>bratushka</b></sub>](https://github.com/bratushka)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=bratushka "Code") | [<img src="https://avatars3.githubusercontent.com/u/615381?v=4" width="100px;"/><br /><sub><b>Anders D. Johnson</b></sub>](https://andrz.me)<br />[📖](https://github.com/toomuchdesign/re-reselect/commits?author=AndersDJohnson "Documentation") | [<img src="https://avatars3.githubusercontent.com/u/8556724?v=4" width="100px;"/><br /><sub><b>Július Retzer</b></sub>](https://github.com/wormyy)<br />[📖](https://github.com/toomuchdesign/re-reselect/commits?author=wormyy "Documentation") | [<img src="https://avatars3.githubusercontent.com/u/10407025?v=4" width="100px;"/><br /><sub><b>Maarten Schumacher</b></sub>](https://github.com/maartenschumacher)<br />[🤔](#ideas-maartenschumacher "Ideas, Planning, & Feedback") | [<img src="https://avatars2.githubusercontent.com/u/664238?v=4" width="100px;"/><br /><sub><b>Alexander Jarvis</b></sub>](https://github.com/alexanderjarvis)<br />[🤔](#ideas-alexanderjarvis "Ideas, Planning, & Feedback") |
-| [<img src="https://avatars1.githubusercontent.com/u/514026?v=4" width="100px;"/><br /><sub><b>Gregg B</b></sub>](https://github.com/greggb)<br />[💡](#example-greggb "Examples") | [<img src="https://avatars0.githubusercontent.com/u/897931?v=4" width="100px;"/><br /><sub><b>Ian Obermiller</b></sub>](http://ianobermiller.com)<br />[👀](#review-ianobermiller "Reviewed Pull Requests") | [<img src="https://avatars3.githubusercontent.com/u/7040242?v=4" width="100px;"/><br /><sub><b>Kanitkorn Sujautra</b></sub>](https://github.com/lukyth)<br />[📖](https://github.com/toomuchdesign/re-reselect/commits?author=lukyth "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/6233440?v=4" width="100px;"/><br /><sub><b>Brian Kraus</b></sub>](https://github.com/suark)<br />[📖](https://github.com/toomuchdesign/re-reselect/commits?author=suark "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/9800850?v=4" width="100px;"/><br /><sub><b>Mateusz Burzyński</b></sub>](https://github.com/Andarist)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=Andarist "Code") [🚇](#infra-Andarist "Infrastructure (Hosting, Build-Tools, etc)") | [<img src="https://avatars1.githubusercontent.com/u/7252227?v=4" width="100px;"/><br /><sub><b>el-dav</b></sub>](https://github.com/el-dav)<br />[🐛](https://github.com/toomuchdesign/re-reselect/issues?q=author%3Ael-dav "Bug reports") | [<img src="https://avatars3.githubusercontent.com/u/15995890?v=4" width="100px;"/><br /><sub><b>Sergei Grishchenko</b></sub>](https://github.com/sgrishchenko)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=sgrishchenko "Code") [⚠️](https://github.com/toomuchdesign/re-reselect/commits?author=sgrishchenko "Tests") |
+| [<img src="https://avatars1.githubusercontent.com/u/4211838?v=4" width="100px;"/><br /><sub><b>Sushain Cherivirala</b></sub>](https://www.skc.name)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=sushain97 "Code") | [<img src="https://avatars0.githubusercontent.com/u/6316590?v=4" width="100px;"/><br /><sub><b>Steve Mao</b></sub>](https://twitter.com/MaoStevemao)<br />[📖](https://github.com/toomuchdesign/re-reselect/commits?author=stevemao "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/1428826?v=4" width="100px;"/><br /><sub><b>Gaurav Lahoti</b></sub>](https://github.com/Dante-101)<br />[🐛](https://github.com/toomuchdesign/re-reselect/issues?q=author%3ADante-101 "Bug reports") | [<img src="https://avatars3.githubusercontent.com/u/13602053?v=4" width="100px;"/><br /><sub><b>Lon</b></sub>](http://lon.im)<br />[🐛](https://github.com/toomuchdesign/re-reselect/issues?q=author%3Acnlon "Bug reports") | [<img src="https://avatars2.githubusercontent.com/u/5492495?v=4" width="100px;"/><br /><sub><b>bratushka</b></sub>](https://github.com/bratushka)<br />[💻](https://github.com/toomuchdesign/re-reselect/commits?author=bratushka "Code") | [<img src="https://avatars3.githubusercontent.com/u/615381?v=4" width="100px;"/><br /><sub><b>Anders D. Johnson</b></sub>](https://andrz.me)<br />[📖](https://github.com/toomuchdesign/re-reselect/commits?author=AndersDJohnson "Documentation") | [<img src="https://avatars3.githubusercontent.com/u/8556724?v=4" width="100px;"/><br /><sub><b>Július Retzer</b></sub>](https://github.com/wormyy)<br />[📖](https://github.com/toomuchdesign/re-reselect/commits?author=wormyy "Documentation") |
+| [<img src="https://avatars3.githubusercontent.com/u/10407025?v=4" width="100px;"/><br /><sub><b>Maarten Schumacher</b></sub>](https://github.com/maartenschumacher)<br />[🤔](#ideas-maartenschumacher "Ideas, Planning, & Feedback") | [<img src="https://avatars2.githubusercontent.com/u/664238?v=4" width="100px;"/><br /><sub><b>Alexander Jarvis</b></sub>](https://github.com/alexanderjarvis)<br />[🤔](#ideas-alexanderjarvis "Ideas, Planning, & Feedback") | [<img src="https://avatars1.githubusercontent.com/u/514026?v=4" width="100px;"/><br /><sub><b>Gregg B</b></sub>](https://github.com/greggb)<br />[💡](#example-greggb "Examples") | [<img src="https://avatars0.githubusercontent.com/u/897931?v=4" width="100px;"/><br /><sub><b>Ian Obermiller</b></sub>](http://ianobermiller.com)<br />[👀](#review-ianobermiller "Reviewed Pull Requests") | [<img src="https://avatars3.githubusercontent.com/u/7040242?v=4" width="100px;"/><br /><sub><b>Kanitkorn Sujautra</b></sub>](https://github.com/lukyth)<br />[📖](https://github.com/toomuchdesign/re-reselect/commits?author=lukyth "Documentation") | [<img src="https://avatars2.githubusercontent.com/u/6233440?v=4" width="100px;"/><br /><sub><b>Brian Kraus</b></sub>](https://github.com/suark)<br />[📖](https://github.com/toomuchdesign/re-reselect/commits?author=suark "Documentation") | [<img src="https://avatars1.githubusercontent.com/u/7252227?v=4" width="100px;"/><br /><sub><b>el-dav</b></sub>](https://github.com/el-dav)<br />[🐛](https://github.com/toomuchdesign/re-reselect/issues?q=author%3Ael-dav "Bug reports") |
 | [<img src="https://avatars3.githubusercontent.com/u/1970156?v=4" width="100px;"/><br /><sub><b>Augustin Riedinger</b></sub>](https://augustin-riedinger.fr)<br />[🤔](#ideas-augnustin "Ideas, Planning, & Feedback") |
 
 <!-- ALL-CONTRIBUTORS-LIST:END -->