diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,10 +3,10 @@
 updates with no change for compatibility with the corresponding
 mattermost-api of the same version.
 
-50200.2.0
+50200.4.0
 =========
 
- * Updated for mattermost-api version 50200.2.0.
+ * Updated for mattermost-api version 50200.4.0.
 
 50200.3.0
 =========
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:             50200.3.0
+version:             50200.4.0
 synopsis:            QuickCheck instances for the Mattermost client API library
 
 description:         A library providing QuickCheck for the mattermost-api
@@ -27,7 +27,7 @@
   exposed-modules:     Network.Mattermost.QuickCheck
   build-depends:       base >=4.4 && <5
                      , containers
-                     , mattermost-api == 50200.3.0
+                     , mattermost-api == 50200.4.0
                      , 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
@@ -132,3 +132,4 @@
           <*> genTime
           <*> genChannelId
           <*> arbitrary
+          <*> genMaybe arbitrary