diff --git a/Sources/PlayingCard/PlayingCard.swift b/Sources/PlayingCard/PlayingCard.swift
index 4d86bd4..3db0d98 100644
--- a/Sources/PlayingCard/PlayingCard.swift
+++ b/Sources/PlayingCard/PlayingCard.swift
@@ -28,7 +28,7 @@ extension PlayingCard: Comparable {
 
 // MARK: - CustomStringConvertible
 
-extension PlayingCard : CustomStringConvertible {
+extension PlayingCard: CustomStringConvertible {
     public var description: String {
         return "\(suit) \(rank)"
     }
diff --git a/Sources/PlayingCard/Rank.swift b/Sources/PlayingCard/Rank.swift
index ab3da99..9c55f3f 100644
--- a/Sources/PlayingCard/Rank.swift
+++ b/Sources/PlayingCard/Rank.swift
@@ -8,7 +8,7 @@
  See http://swift.org/CONTRIBUTORS.txt for Swift project authors
 */
 
-public enum Rank : Int {
+public enum Rank: Int {
     case two = 2
     case three, four, five, six, seven, eight, nine, ten
     case jack, queen, king, ace
@@ -16,7 +16,7 @@ public enum Rank : Int {
 
 // MARK: - Comparable
 
-extension Rank : Comparable {
+extension Rank: Comparable {
     public static func <(lhs: Rank, rhs: Rank) -> Bool {
         switch (lhs, rhs) {
         case (_, _) where lhs == rhs:
@@ -31,7 +31,7 @@ extension Rank : Comparable {
 
 // MARK: - CustomStringConvertible
 
-extension Rank : CustomStringConvertible {
+extension Rank: CustomStringConvertible {
     public var description: String {
         switch self {
         case .ace: return "A"
diff --git a/Sources/PlayingCard/Suit.swift b/Sources/PlayingCard/Suit.swift
index 6b205b5..baa2803 100644
--- a/Sources/PlayingCard/Suit.swift
+++ b/Sources/PlayingCard/Suit.swift
@@ -31,7 +31,7 @@ extension Suit: Comparable {
 
 // MARK: - CustomStringConvertible
 
-extension Suit : CustomStringConvertible {
+extension Suit: CustomStringConvertible {
     public var description: String {
         switch self {
         case .spades: return "♠︎"