diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,9 @@
 
+40600.0.0
+=========
+
+ * Updated for mattermost-api version 40600.0.0.
+
 40400.0.0
 =========
 
diff --git a/mattermost-api-qc.cabal b/mattermost-api-qc.cabal
--- a/mattermost-api-qc.cabal
+++ b/mattermost-api-qc.cabal
@@ -1,5 +1,5 @@
 name:                mattermost-api-qc
-version:             40400.0.0
+version:             40600.0.0
 description:         A testing library for the mattermost-api library
 synopsis:            QuickCheck instances for the Mattermost client API library
 homepage:            https://github.com/matterhorn-chat/mattermost-api-qc
@@ -22,7 +22,7 @@
   exposed-modules:     Network.Mattermost.QuickCheck
   build-depends:       base >=4.4 && <5
                      , containers
-                     , mattermost-api == 40400.0.0
+                     , mattermost-api == 40600.0.0
                      , QuickCheck
                      , text
                      , time
diff --git a/src/Network/Mattermost/QuickCheck.hs b/src/Network/Mattermost/QuickCheck.hs
--- a/src/Network/Mattermost/QuickCheck.hs
+++ b/src/Network/Mattermost/QuickCheck.hs
@@ -33,10 +33,11 @@
                      , (9, Seq.fromList <$> vectorOf s g)
                      ]
 
-genTime :: Gen UTCTime
-genTime = UTCTime
+genTime :: Gen ServerTime
+genTime = ServerTime <$>
+          (UTCTime
            <$> (ModifiedJulianDay <$> (2000 +) <$> arbitrary)
-           <*> (secondsToDiffTime <$> choose (0, 86400))
+           <*> (secondsToDiffTime <$> choose (0, 86400)))
 
 genPostId :: Gen PostId
 genPostId = PI . Id <$> genText
@@ -121,6 +122,7 @@
           <*> genText
           <*> genMaybe genTime
           <*> genText
+          <*> genTime
           <*> genTime
           <*> genMaybe genUserId
           <*> genTime