diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0da2589b..c899466a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,13 @@
+<a name="v2.18.0"></a>
+## v2.18.0 (2016-11-05)
+
+
+#### Features
+
+* **Completions:**  adds completion support for PowerShell. ([cff82c88](https://github.com/kbknapp/clap-rs/commit/cff82c880e21064fca63351507b80350df6caadf), closes [#729](https://github.com/kbknapp/clap-rs/issues/729))
+
+
+
 <a name="v2.17.1"></a>
 ### v2.17.1 (2016-11-02)
 
diff --git a/CONTRIBUTORS.md b/CONTRIBUTORS.md
index 9015671b..a7027f01 100644
--- a/CONTRIBUTORS.md
+++ b/CONTRIBUTORS.md
@@ -1,49 +1,48 @@
-The following is a list of contributors to the [clap](https://github.com/kbknapp/clap-rs) project, in alphabetical order:
+The following is a list of contributors in alphabetical order:
 
-[<img alt="afiune" src="https://avatars.githubusercontent.com/u/5712253?v=3&s=117" width="117">](https://github.com/afiune) |[<img alt="alex-gulyas" src="https://avatars.githubusercontent.com/u/8698329?v=3&s=117" width="117">](https://github.com/alex-gulyas) |[<img alt="alexbool" src="https://avatars.githubusercontent.com/u/1283792?v=3&s=117" width="117">](https://github.com/alexbool) |[<img alt="AluisioASG" src="https://avatars.githubusercontent.com/u/1904165?v=3&s=117" width="117">](https://github.com/AluisioASG) |[<img alt="archer884" src="https://avatars.githubusercontent.com/u/679494?v=3&s=117" width="117">](https://github.com/archer884) |
-:---: |:---: |:---: |:---: |:---: |
-[afiune](https://github.com/afiune) |[alex-gulyas](https://github.com/alex-gulyas) |[alexbool](https://github.com/alexbool) |[AluisioASG](https://github.com/AluisioASG) |[archer884](https://github.com/archer884) |
 
-[<img alt="Bilalh" src="https://avatars.githubusercontent.com/u/171602?v=3&s=117" width="117">](https://github.com/Bilalh) |[<img alt="birkenfeld" src="https://avatars.githubusercontent.com/u/144359?v=3&s=117" width="117">](https://github.com/birkenfeld) |[<img alt="bradurani" src="https://avatars.githubusercontent.com/u/4195952?v=3&s=117" width="117">](https://github.com/bradurani) |[<img alt="brennie" src="https://avatars.githubusercontent.com/u/156585?v=3&s=117" width="117">](https://github.com/brennie) |[<img alt="brianp" src="https://avatars.githubusercontent.com/u/179134?v=3&s=117" width="117">](https://github.com/brianp) |
-:---: |:---: |:---: |:---: |:---: |
-[Bilalh](https://github.com/Bilalh) |[birkenfeld](https://github.com/birkenfeld) |[bradurani](https://github.com/bradurani) |[brennie](https://github.com/brennie) |[brianp](https://github.com/brianp) |
+[<img alt="afiune" src="https://avatars.githubusercontent.com/u/5712253?v=3&s=117" width="117">](https://github.com/afiune) |[<img alt="alexbool" src="https://avatars.githubusercontent.com/u/1283792?v=3&s=117" width="117">](https://github.com/alexbool) |[<img alt="AluisioASG" src="https://avatars.githubusercontent.com/u/1904165?v=3&s=117" width="117">](https://github.com/AluisioASG) |[<img alt="AluisioASG" src="https://avatars.githubusercontent.com/u/1904165?v=3&s=117" width="117">](https://github.com/AluisioASG) |[<img alt="archer884" src="https://avatars.githubusercontent.com/u/679494?v=3&s=117" width="117">](https://github.com/archer884) |[<img alt="Arnavion" src="https://avatars.githubusercontent.com/u/1096010?v=3&s=117" width="117">](https://github.com/Arnavion) |
+:---: |:---: |:---: |:---: |:---: |:---: |
+[afiune](https://github.com/afiune) |[alexbool](https://github.com/alexbool) |[AluisioASG](https://github.com/AluisioASG) |[AluisioASG](https://github.com/AluisioASG) |[archer884](https://github.com/archer884) |[Arnavion](https://github.com/Arnavion) |
 
-[<img alt="Byron" src="https://avatars.githubusercontent.com/u/63622?v=3&s=117" width="117">](https://github.com/Byron) |[<img alt="cite-reader" src="https://avatars.githubusercontent.com/u/4196987?v=3&s=117" width="117">](https://github.com/cite-reader) |[<img alt="cstorey" src="https://avatars.githubusercontent.com/u/743059?v=3&s=117" width="117">](https://github.com/cstorey) |[<img alt="daboross" src="https://avatars.githubusercontent.com/u/1152146?v=3&s=117" width="117">](https://github.com/daboross) |[<img alt="davidszotten" src="https://avatars.githubusercontent.com/u/412005?v=3&s=117" width="117">](https://github.com/davidszotten) |
-:---: |:---: |:---: |:---: |:---: |
-[Byron](https://github.com/Byron) |[cite-reader](https://github.com/cite-reader) |[cstorey](https://github.com/cstorey) |[daboross](https://github.com/daboross) |[davidszotten](https://github.com/davidszotten) |
+[<img alt="Bilalh" src="https://avatars.githubusercontent.com/u/171602?v=3&s=117" width="117">](https://github.com/Bilalh) |[<img alt="birkenfeld" src="https://avatars.githubusercontent.com/u/144359?v=3&s=117" width="117">](https://github.com/birkenfeld) |[<img alt="bradurani" src="https://avatars.githubusercontent.com/u/4195952?v=3&s=117" width="117">](https://github.com/bradurani) |[<img alt="brennie" src="https://avatars.githubusercontent.com/u/156585?v=3&s=117" width="117">](https://github.com/brennie) |[<img alt="brianp" src="https://avatars.githubusercontent.com/u/179134?v=3&s=117" width="117">](https://github.com/brianp) |[<img alt="Byron" src="https://avatars.githubusercontent.com/u/63622?v=3&s=117" width="117">](https://github.com/Byron) |
+:---: |:---: |:---: |:---: |:---: |:---: |
+[Bilalh](https://github.com/Bilalh) |[birkenfeld](https://github.com/birkenfeld) |[bradurani](https://github.com/bradurani) |[brennie](https://github.com/brennie) |[brianp](https://github.com/brianp) |[Byron](https://github.com/Byron) |
 
-[<img alt="dguo" src="https://avatars.githubusercontent.com/u/2763135?v=3&s=117" width="117">](https://github.com/dguo) |[<img alt="flying-sheep" src="https://avatars.githubusercontent.com/u/291575?v=3&s=117" width="117">](https://github.com/flying-sheep) |[<img alt="Geogi" src="https://avatars.githubusercontent.com/u/1818316?v=3&s=117" width="117">](https://github.com/Geogi) |[<img alt="gohyda" src="https://avatars.githubusercontent.com/u/10263838?v=3&s=117" width="117">](https://github.com/gohyda) |[<img alt="GrappigPanda" src="https://avatars.githubusercontent.com/u/2055372?v=3&s=117" width="117">](https://github.com/GrappigPanda) |
-:---: |:---: |:---: |:---: |:---: |
-[dguo](https://github.com/dguo) |[flying-sheep](https://github.com/flying-sheep) |[Geogi](https://github.com/Geogi) |[gohyda](https://github.com/gohyda) |[GrappigPanda](https://github.com/GrappigPanda) |
+[<img alt="cstorey" src="https://avatars.githubusercontent.com/u/743059?v=3&s=117" width="117">](https://github.com/cstorey) |[<img alt="daboross" src="https://avatars.githubusercontent.com/u/1152146?v=3&s=117" width="117">](https://github.com/daboross) |[<img alt="davidszotten" src="https://avatars.githubusercontent.com/u/412005?v=3&s=117" width="117">](https://github.com/davidszotten) |[<img alt="dguo" src="https://avatars.githubusercontent.com/u/2763135?v=3&s=117" width="117">](https://github.com/dguo) |[<img alt="flying-sheep" src="https://avatars.githubusercontent.com/u/291575?v=3&s=117" width="117">](https://github.com/flying-sheep) |[<img alt="Geogi" src="https://avatars.githubusercontent.com/u/1818316?v=3&s=117" width="117">](https://github.com/Geogi) |
+:---: |:---: |:---: |:---: |:---: |:---: |
+[cstorey](https://github.com/cstorey) |[daboross](https://github.com/daboross) |[davidszotten](https://github.com/davidszotten) |[dguo](https://github.com/dguo) |[flying-sheep](https://github.com/flying-sheep) |[Geogi](https://github.com/Geogi) |
 
-[<img alt="grossws" src="https://avatars.githubusercontent.com/u/171284?v=3&s=117" width="117">](https://github.com/grossws) |[<img alt="hexjelly" src="https://avatars.githubusercontent.com/u/435283?v=3&s=117" width="117">](https://github.com/hexjelly) |[<img alt="hgrecco" src="https://avatars.githubusercontent.com/u/278566?v=3&s=117" width="117">](https://github.com/hgrecco) |[<img alt="homu" src="https://avatars.githubusercontent.com/u/10212162?v=3&s=117" width="117">](https://github.com/homu) |[<img alt="hoodie" src="https://avatars.githubusercontent.com/u/260370?v=3&s=117" width="117">](https://github.com/hoodie) |
-:---: |:---: |:---: |:---: |:---: |
-[grossws](https://github.com/grossws) |[hexjelly](https://github.com/hexjelly) |[hgrecco](https://github.com/hgrecco) |[homu](https://github.com/homu) |[hoodie](https://github.com/hoodie) |
+[<img alt="gohyda" src="https://avatars.githubusercontent.com/u/10263838?v=3&s=117" width="117">](https://github.com/gohyda) |[<img alt="GrappigPanda" src="https://avatars.githubusercontent.com/u/2055372?v=3&s=117" width="117">](https://github.com/GrappigPanda) |[<img alt="grossws" src="https://avatars.githubusercontent.com/u/171284?v=3&s=117" width="117">](https://github.com/grossws) |[<img alt="hexjelly" src="https://avatars.githubusercontent.com/u/435283?v=3&s=117" width="117">](https://github.com/hexjelly) |[<img alt="hgrecco" src="https://avatars.githubusercontent.com/u/278566?v=3&s=117" width="117">](https://github.com/hgrecco) |[<img alt="homu" src="https://avatars.githubusercontent.com/u/10212162?v=3&s=117" width="117">](https://github.com/homu) |
+:---: |:---: |:---: |:---: |:---: |:---: |
+[gohyda](https://github.com/gohyda) |[GrappigPanda](https://github.com/GrappigPanda) |[grossws](https://github.com/grossws) |[hexjelly](https://github.com/hexjelly) |[hgrecco](https://github.com/hgrecco) |[homu](https://github.com/homu) |
 
-[<img alt="huonw" src="https://avatars.githubusercontent.com/u/1203825?v=3&s=117" width="117">](https://github.com/huonw) |[<img alt="idmit" src="https://avatars.githubusercontent.com/u/2546728?v=3&s=117" width="117">](https://github.com/idmit) |[<img alt="iliekturtles" src="https://avatars.githubusercontent.com/u/5081378?v=3&s=117" width="117">](https://github.com/iliekturtles) |[<img alt="james-darkfox" src="https://avatars.githubusercontent.com/u/637155?v=3&s=117" width="117">](https://github.com/james-darkfox) |[<img alt="japaric" src="https://avatars.githubusercontent.com/u/5018213?v=3&s=117" width="117">](https://github.com/japaric) |
-:---: |:---: |:---: |:---: |:---: |
-[huonw](https://github.com/huonw) |[idmit](https://github.com/idmit) |[iliekturtles](https://github.com/iliekturtles) |[james-darkfox](https://github.com/james-darkfox) |[japaric](https://github.com/japaric) |
+[<img alt="hoodie" src="https://avatars.githubusercontent.com/u/260370?v=3&s=117" width="117">](https://github.com/hoodie) |[<img alt="huonw" src="https://avatars.githubusercontent.com/u/1203825?v=3&s=117" width="117">](https://github.com/huonw) |[<img alt="idmit" src="https://avatars.githubusercontent.com/u/2546728?v=3&s=117" width="117">](https://github.com/idmit) |[<img alt="iliekturtles" src="https://avatars.githubusercontent.com/u/5081378?v=3&s=117" width="117">](https://github.com/iliekturtles) |[<img alt="james-darkfox" src="https://avatars.githubusercontent.com/u/637155?v=3&s=117" width="117">](https://github.com/james-darkfox) |[<img alt="japaric" src="https://avatars.githubusercontent.com/u/5018213?v=3&s=117" width="117">](https://github.com/japaric) |
+:---: |:---: |:---: |:---: |:---: |:---: |
+[hoodie](https://github.com/hoodie) |[huonw](https://github.com/huonw) |[idmit](https://github.com/idmit) |[iliekturtles](https://github.com/iliekturtles) |[james-darkfox](https://github.com/james-darkfox) |[japaric](https://github.com/japaric) |
 
-[<img alt="jespino" src="https://avatars.githubusercontent.com/u/290303?v=3&s=117" width="117">](https://github.com/jespino) |[<img alt="jimmycuadra" src="https://avatars.githubusercontent.com/u/122457?v=3&s=117" width="117">](https://github.com/jimmycuadra) |[<img alt="joshtriplett" src="https://avatars.githubusercontent.com/u/162737?v=3&s=117" width="117">](https://github.com/joshtriplett) |[<img alt="kbknapp" src="https://avatars.githubusercontent.com/u/6942134?v=3&s=117" width="117">](https://github.com/kbknapp) |[<img alt="Keats" src="https://avatars.githubusercontent.com/u/680355?v=3&s=117" width="117">](https://github.com/Keats) |
-:---: |:---: |:---: |:---: |:---: |
-[jespino](https://github.com/jespino) |[jimmycuadra](https://github.com/jimmycuadra) |[joshtriplett](https://github.com/joshtriplett) |[kbknapp](https://github.com/kbknapp) |[Keats](https://github.com/Keats) |
+[<img alt="jespino" src="https://avatars.githubusercontent.com/u/290303?v=3&s=117" width="117">](https://github.com/jespino) |[<img alt="jimmycuadra" src="https://avatars.githubusercontent.com/u/122457?v=3&s=117" width="117">](https://github.com/jimmycuadra) |[<img alt="joshtriplett" src="https://avatars.githubusercontent.com/u/162737?v=3&s=117" width="117">](https://github.com/joshtriplett) |[<img alt="joshtriplett" src="https://avatars.githubusercontent.com/u/162737?v=3&s=117" width="117">](https://github.com/joshtriplett) |[<img alt="kbknapp" src="https://avatars.githubusercontent.com/u/6942134?v=3&s=117" width="117">](https://github.com/kbknapp) |[<img alt="Keats" src="https://avatars.githubusercontent.com/u/680355?v=3&s=117" width="117">](https://github.com/Keats) |
+:---: |:---: |:---: |:---: |:---: |:---: |
+[jespino](https://github.com/jespino) |[jimmycuadra](https://github.com/jimmycuadra) |[joshtriplett](https://github.com/joshtriplett) |[joshtriplett](https://github.com/joshtriplett) |[kbknapp](https://github.com/kbknapp) |[Keats](https://github.com/Keats) |
 
-[<img alt="messense" src="https://avatars.githubusercontent.com/u/1556054?v=3&s=117" width="117">](https://github.com/messense) |[<img alt="N-006" src="https://avatars.githubusercontent.com/u/399312?v=3&s=117" width="117">](https://github.com/N-006) |[<img alt="nabijaczleweli" src="https://avatars.githubusercontent.com/u/6709544?v=3&s=117" width="117">](https://github.com/nabijaczleweli) |[<img alt="nelsonjchen" src="https://avatars.githubusercontent.com/u/5363?v=3&s=117" width="117">](https://github.com/nelsonjchen) |[<img alt="nicompte" src="https://avatars.githubusercontent.com/u/439369?v=3&s=117" width="117">](https://github.com/nicompte) |
-:---: |:---: |:---: |:---: |:---: |
-[messense](https://github.com/messense) |[N-006](https://github.com/N-006) |[nabijaczleweli](https://github.com/nabijaczleweli) |[nelsonjchen](https://github.com/nelsonjchen) |[nicompte](https://github.com/nicompte) |
+[<img alt="matthiasbeyer" src="https://avatars.githubusercontent.com/u/427866?v=3&s=117" width="117">](https://github.com/matthiasbeyer) |[<img alt="messense" src="https://avatars.githubusercontent.com/u/1556054?v=3&s=117" width="117">](https://github.com/messense) |[<img alt="mvaude" src="https://avatars.githubusercontent.com/u/9532611?v=3&s=117" width="117">](https://github.com/mvaude) |[<img alt="N-006" src="https://avatars.githubusercontent.com/u/399312?v=3&s=117" width="117">](https://github.com/N-006) |[<img alt="nabijaczleweli" src="https://avatars.githubusercontent.com/u/6709544?v=3&s=117" width="117">](https://github.com/nabijaczleweli) |[<img alt="nelsonjchen" src="https://avatars.githubusercontent.com/u/5363?v=3&s=117" width="117">](https://github.com/nelsonjchen) |
+:---: |:---: |:---: |:---: |:---: |:---: |
+[matthiasbeyer](https://github.com/matthiasbeyer) |[messense](https://github.com/messense) |[mvaude](https://github.com/mvaude) |[N-006](https://github.com/N-006) |[nabijaczleweli](https://github.com/nabijaczleweli) |[nelsonjchen](https://github.com/nelsonjchen) |
 
-[<img alt="nvzqz" src="https://avatars.githubusercontent.com/u/10367662?v=3&s=117" width="117">](https://github.com/nvzqz) |[<img alt="ogham" src="https://avatars.githubusercontent.com/u/503760?v=3&s=117" width="117">](https://github.com/ogham) |[<img alt="panicbit" src="https://avatars.githubusercontent.com/u/628445?v=3&s=117" width="117">](https://github.com/panicbit) |[<img alt="rnelson" src="https://avatars.githubusercontent.com/u/118361?v=3&s=117" width="117">](https://github.com/rnelson) |[<img alt="rtaycher" src="https://avatars.githubusercontent.com/u/324733?v=3&s=117" width="117">](https://github.com/rtaycher) |
-:---: |:---: |:---: |:---: |:---: |
-[nvzqz](https://github.com/nvzqz) |[ogham](https://github.com/ogham) |[panicbit](https://github.com/panicbit) |[rnelson](https://github.com/rnelson) |[rtaycher](https://github.com/rtaycher) |
+[<img alt="Nemo157" src="https://avatars.githubusercontent.com/u/81079?v=3&s=117" width="117">](https://github.com/Nemo157) |[<img alt="nicompte" src="https://avatars.githubusercontent.com/u/439369?v=3&s=117" width="117">](https://github.com/nicompte) |[<img alt="nvzqz" src="https://avatars.githubusercontent.com/u/10367662?v=3&s=117" width="117">](https://github.com/nvzqz) |[<img alt="ogham" src="https://avatars.githubusercontent.com/u/503760?v=3&s=117" width="117">](https://github.com/ogham) |[<img alt="panicbit" src="https://avatars.githubusercontent.com/u/628445?v=3&s=117" width="117">](https://github.com/panicbit) |[<img alt="rnelson" src="https://avatars.githubusercontent.com/u/118361?v=3&s=117" width="117">](https://github.com/rnelson) |
+:---: |:---: |:---: |:---: |:---: |:---: |
+[Nemo157](https://github.com/Nemo157) |[nicompte](https://github.com/nicompte) |[nvzqz](https://github.com/nvzqz) |[ogham](https://github.com/ogham) |[panicbit](https://github.com/panicbit) |[rnelson](https://github.com/rnelson) |
 
-[<img alt="SirVer" src="https://avatars.githubusercontent.com/u/140115?v=3&s=117" width="117">](https://github.com/SirVer) |[<img alt="sru" src="https://avatars.githubusercontent.com/u/2485892?v=3&s=117" width="117">](https://github.com/sru) |[<img alt="SShrike" src="https://avatars.githubusercontent.com/u/4061736?v=3&s=117" width="117">](https://github.com/SShrike) |[<img alt="starkat99" src="https://avatars.githubusercontent.com/u/8295111?v=3&s=117" width="117">](https://github.com/starkat99) |[<img alt="swatteau" src="https://avatars.githubusercontent.com/u/5521255?v=3&s=117" width="117">](https://github.com/swatteau) |
-:---: |:---: |:---: |:---: |:---: |
-[SirVer](https://github.com/SirVer) |[sru](https://github.com/sru) |[SShrike](https://github.com/SShrike) |[starkat99](https://github.com/starkat99) |[swatteau](https://github.com/swatteau) |
+[<img alt="rtaycher" src="https://avatars.githubusercontent.com/u/324733?v=3&s=117" width="117">](https://github.com/rtaycher) |[<img alt="SirVer" src="https://avatars.githubusercontent.com/u/140115?v=3&s=117" width="117">](https://github.com/SirVer) |[<img alt="sru" src="https://avatars.githubusercontent.com/u/2485892?v=3&s=117" width="117">](https://github.com/sru) |[<img alt="SShrike" src="https://avatars.githubusercontent.com/u/4061736?v=3&s=117" width="117">](https://github.com/SShrike) |[<img alt="starkat99" src="https://avatars.githubusercontent.com/u/8295111?v=3&s=117" width="117">](https://github.com/starkat99) |[<img alt="swatteau" src="https://avatars.githubusercontent.com/u/5521255?v=3&s=117" width="117">](https://github.com/swatteau) |
+:---: |:---: |:---: |:---: |:---: |:---: |
+[rtaycher](https://github.com/rtaycher) |[SirVer](https://github.com/SirVer) |[sru](https://github.com/sru) |[SShrike](https://github.com/SShrike) |[starkat99](https://github.com/starkat99) |[swatteau](https://github.com/swatteau) |
+
+[<img alt="tanakh" src="https://avatars.githubusercontent.com/u/109069?v=3&s=117" width="117">](https://github.com/tanakh) |[<img alt="th4t" src="https://avatars.githubusercontent.com/u/2801030?v=3&s=117" width="117">](https://github.com/th4t) |[<img alt="tormol" src="https://avatars.githubusercontent.com/u/10460821?v=3&s=117" width="117">](https://github.com/tormol) |[<img alt="tshepang" src="https://avatars.githubusercontent.com/u/588486?v=3&s=117" width="117">](https://github.com/tshepang) |[<img alt="untitaker" src="https://avatars.githubusercontent.com/u/837573?v=3&s=117" width="117">](https://github.com/untitaker) |[<img alt="Vinatorul" src="https://avatars.githubusercontent.com/u/6770624?v=3&s=117" width="117">](https://github.com/Vinatorul) |
+:---: |:---: |:---: |:---: |:---: |:---: |
+[tanakh](https://github.com/tanakh) |[th4t](https://github.com/th4t) |[tormol](https://github.com/tormol) |[tshepang](https://github.com/tshepang) |[untitaker](https://github.com/untitaker) |[Vinatorul](https://github.com/Vinatorul) |
+
+[<img alt="vks" src="https://avatars.githubusercontent.com/u/33460?v=3&s=117" width="117">](https://github.com/vks) |[<img alt="volks73" src="https://avatars.githubusercontent.com/u/1915469?v=3&s=117" width="117">](https://github.com/volks73) |[<img alt="wdv4758h" src="https://avatars.githubusercontent.com/u/2716047?v=3&s=117" width="117">](https://github.com/wdv4758h) |
+:---: |:---: |:---: |
+[vks](https://github.com/vks) |[volks73](https://github.com/volks73) |[wdv4758h](https://github.com/wdv4758h) |
 
-[<img alt="tanakh" src="https://avatars.githubusercontent.com/u/109069?v=3&s=117" width="117">](https://github.com/tanakh) |[<img alt="th4t" src="https://avatars.githubusercontent.com/u/2801030?v=3&s=117" width="117">](https://github.com/th4t) |[<img alt="tormol" src="https://avatars.githubusercontent.com/u/10460821?v=3&s=117" width="117">](https://github.com/tormol) |[<img alt="tshepang" src="https://avatars.githubusercontent.com/u/588486?v=3&s=117" width="117">](https://github.com/tshepang) |[<img alt="untitaker" src="https://avatars.githubusercontent.com/u/837573?v=3&s=117" width="117">](https://github.com/untitaker) |
-:---: |:---: |:---: |:---: |:---: |
-[tanakh](https://github.com/tanakh) |[th4t](https://github.com/th4t) |[tormol](https://github.com/tormol) |[tshepang](https://github.com/tshepang) |[untitaker](https://github.com/untitaker) |
 
-[<img alt="Vinatorul" src="https://avatars.githubusercontent.com/u/6770624?v=3&s=117" width="117">](https://github.com/Vinatorul) |[<img alt="vks" src="https://avatars.githubusercontent.com/u/33460?v=3&s=117" width="117">](https://github.com/vks) |[<img alt="volks73" src="https://avatars.githubusercontent.com/u/1915469?v=3&s=117" width="117">](https://github.com/volks73) |[<img alt="wdv4758h" src="https://avatars.githubusercontent.com/u/2716047?v=3&s=117" width="117">](https://github.com/wdv4758h) | <img alt="Yo-Bot" src="https://avatars3.githubusercontent.com/u/14209514?v=3&s=117" width="117"> |
-:---: |:---: |:---: |:---: |
-[Vinatorul](https://github.com/Vinatorul) |[vks](https://github.com/vks) |[volks73](https://github.com/volks73) |[wdv4758h](https://github.com/wdv4758h) | [Yo-Bot](https://github.com/yo-bot) |
\ No newline at end of file
diff --git a/Cargo.toml b/Cargo.toml
index fcd7db4d..00aa940f 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 
 name = "clap"
-version = "2.17.1"
+version = "2.18.0"
 authors = ["Kevin K. <kbknapp@gmail.com>"]
 exclude = ["examples/*", "clap-test/*", "tests/*", "benches/*", "*.png", "clap-perf/*", "*.dot"]
 repository = "https://github.com/kbknapp/clap-rs.git"
diff --git a/README.md b/README.md
index 2023df77..4ed687d6 100644
--- a/README.md
+++ b/README.md
@@ -41,6 +41,10 @@ Created by [gh-md-toc](https://github.com/ekalinin/github-markdown-toc)
 
 ## What's New
 
+Here's what's new in v2.18.0
+
+* **Completions:**  Adds completion support for Microsoft PowerShell! (Thanks to @Arnavion)
+
 Here's what's new in v2.17.1
 
 * Fixes a bug where using low index multiples was propagated to subcommands
diff --git a/justfile b/justfile
new file mode 100644
index 00000000..5ea0ac25
--- /dev/null
+++ b/justfile
@@ -0,0 +1,9 @@
+update-contributors:
+	@echo 'Removing old CONTRIBUTORS.md'
+	@mv CONTRIBUTORS.md CONTRIBUTORS.md.bak
+	@echo 'Downloading a list of new contributors'
+	@echo "The following is a list of contributors in alphabetical order:" > CONTRIBUTORS.md
+	@echo "" >> CONTRIBUTORS.md
+	@echo "" >> CONTRIBUTORS.md
+	@githubcontrib --owner kbknapp --repo clap-rs --sha master --cols 6 --format md --showlogin true --sortBy login >> CONTRIBUTORS.md
+	@rm CONTRIBUTORS.md.bak