diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,9 @@
-## [_Unreleased_](https://github.com/freckle/stackctl/compare/v1.1.0.5...main)
+## [_Unreleased_](https://github.com/freckle/stackctl/compare/v1.1.1.0...main)
+
+## [v1.1.1.0](https://github.com/freckle/stackctl/compare/v1.1.0.5...v1.1.1.0)
+
+- Add `--parameter` to `changes` and `deploy`
+- Sort changes by causing-before-caused
 
 ## [v1.1.0.5](https://github.com/freckle/stackctl/compare/v1.1.0.4...v1.1.0.5)
 
diff --git a/src/Stackctl/AWS/CloudFormation.hs b/src/Stackctl/AWS/CloudFormation.hs
--- a/src/Stackctl/AWS/CloudFormation.hs
+++ b/src/Stackctl/AWS/CloudFormation.hs
@@ -94,6 +94,7 @@
 import qualified Data.UUID as UUID
 import qualified Data.UUID.V4 as UUID
 import Stackctl.AWS.Core
+import Stackctl.Sort
 import UnliftIO.Exception.Lens (handling_, trying)
 
 newtype StackId = StackId
@@ -375,7 +376,7 @@
   awsSimple "DescribeChangeSet" req $ \resp ->
     ChangeSet
       <$> (resp ^. describeChangeSetResponse_creationTime)
-      <*> pure (resp ^. describeChangeSetResponse_changes)
+      <*> pure (fmap sortChanges $ resp ^. describeChangeSetResponse_changes)
       <*> (ChangeSetName <$> resp ^. describeChangeSetResponse_changeSetName)
       <*> (resp ^. describeChangeSetResponse_executionStatus)
       <*> (ChangeSetId <$> resp ^. describeChangeSetResponse_changeSetId)
@@ -387,6 +388,23 @@
       <*> pure (resp ^. describeChangeSetResponse_status)
       <*> pure (resp ^. describeChangeSetResponse_statusReason)
       <*> pure resp
+
+sortChanges :: [Change] -> [Change]
+sortChanges = sortByDependencies changeName changeCausedBy
+
+changeName :: Change -> Text
+changeName c = fromMaybe "" $ do
+  ResourceChange' {..} <- resourceChange c
+  logicalResourceId
+
+changeCausedBy :: Change -> [Text]
+changeCausedBy c = fromMaybe [] $ do
+  ResourceChange' {..} <- resourceChange c
+  mapMaybe detailCausingLogicalResourceId <$> details
+
+detailCausingLogicalResourceId :: ResourceChangeDetail -> Maybe Text
+detailCausingLogicalResourceId ResourceChangeDetail' {..} =
+  T.takeWhile (/= '.') <$> causingEntity
 
 awsCloudFormationExecuteChangeSet
   :: (MonadResource m, MonadReader env m, HasAwsEnv env) => ChangeSetId -> m ()
diff --git a/src/Stackctl/DirectoryOption.hs b/src/Stackctl/DirectoryOption.hs
--- a/src/Stackctl/DirectoryOption.hs
+++ b/src/Stackctl/DirectoryOption.hs
@@ -21,4 +21,5 @@
   , help "Operate on specifications in PATH"
   , value "."
   , showDefault
+  , action "directory"
   ]
diff --git a/src/Stackctl/ParameterOption.hs b/src/Stackctl/ParameterOption.hs
new file mode 100644
--- /dev/null
+++ b/src/Stackctl/ParameterOption.hs
@@ -0,0 +1,25 @@
+module Stackctl.ParameterOption
+  ( parameterOption
+  ) where
+
+import Stackctl.Prelude
+
+import qualified Data.Text as T
+import Options.Applicative
+import Stackctl.AWS.CloudFormation (Parameter, makeParameter)
+
+parameterOption :: Parser Parameter
+parameterOption = option (eitherReader readParameter) $ mconcat
+  [ short 'p'
+  , long "parameter"
+  , metavar "KEY=[VALUE]"
+  , help "Override the given Parameter for this operation"
+  ]
+
+readParameter :: String -> Either String Parameter
+readParameter s = case T.breakOn "=" t of
+  (_, v) | T.null v -> Left $ "No '=' found (" <> s <> ")"
+  (k, _) | T.null k -> Left $ "Empty key (" <> s <> ")"
+  (k, "=") -> Right $ makeParameter k $ Just ""
+  (k, v) -> Right $ makeParameter k $ Just $ T.drop 1 v
+  where t = pack s
diff --git a/src/Stackctl/Sort.hs b/src/Stackctl/Sort.hs
new file mode 100644
--- /dev/null
+++ b/src/Stackctl/Sort.hs
@@ -0,0 +1,26 @@
+module Stackctl.Sort
+  ( sortByDependencies
+  ) where
+
+import Stackctl.Prelude
+
+import Data.Graph (graphFromEdges, topSort)
+
+sortByDependencies
+  :: Ord k
+  => (a -> k)
+  -- ^ How to identify a given item
+  -> (a -> [k])
+  -- ^ How to get the given item's dependencies
+  -> [a]
+  -> [a]
+sortByDependencies toName toDepends specs =
+  map nodeFromVertex $ reverse $ topSort graph
+ where
+  (graph, tripleFromVertex, _) = graphFromEdges $ map tripleFromNode specs
+
+  nodeFromVertex = nodeFromTriple . tripleFromVertex
+
+  tripleFromNode n = (n, toName n, toDepends n)
+
+  nodeFromTriple (n, _, _) = n
diff --git a/src/Stackctl/Spec/Changes.hs b/src/Stackctl/Spec/Changes.hs
--- a/src/Stackctl/Spec/Changes.hs
+++ b/src/Stackctl/Spec/Changes.hs
@@ -8,11 +8,12 @@
 
 import qualified Data.Text.IO as T
 import Options.Applicative
-import Stackctl.AWS
+import Stackctl.AWS hiding (action)
 import Stackctl.AWS.Scope
 import Stackctl.Colors
 import Stackctl.DirectoryOption (HasDirectoryOption)
 import Stackctl.FilterOption (HasFilterOption)
+import Stackctl.ParameterOption
 import Stackctl.Spec.Changes.Format
 import Stackctl.Spec.Discover
 import Stackctl.StackSpec
@@ -20,6 +21,7 @@
 
 data ChangesOptions = ChangesOptions
   { scoFormat :: Format
+  , scoParameters :: [Parameter]
   , scoOutput :: FilePath
   }
 
@@ -28,9 +30,11 @@
 runChangesOptions :: Parser ChangesOptions
 runChangesOptions = ChangesOptions
   <$> formatOption
+  <*> many parameterOption
   <*> argument str
     (  metavar "PATH"
     <> help "Where to write the changes summary"
+    <> action "file"
     )
 
 runChanges
@@ -55,7 +59,7 @@
 
   for_ specs $ \spec -> do
     withThreadContext ["stackName" .= stackSpecStackName spec] $ do
-      emChangeSet <- createChangeSet spec
+      emChangeSet <- createChangeSet spec scoParameters
 
       case emChangeSet of
         Left err -> do
diff --git a/src/Stackctl/Spec/Deploy.hs b/src/Stackctl/Spec/Deploy.hs
--- a/src/Stackctl/Spec/Deploy.hs
+++ b/src/Stackctl/Spec/Deploy.hs
@@ -11,12 +11,13 @@
 import qualified Data.Text as T
 import Data.Time (defaultTimeLocale, formatTime, utcToLocalZonedTime)
 import Options.Applicative
-import Stackctl.AWS
+import Stackctl.AWS hiding (action)
 import Stackctl.AWS.Scope
 import Stackctl.Action
 import Stackctl.Colors
 import Stackctl.DirectoryOption (HasDirectoryOption)
 import Stackctl.FilterOption (HasFilterOption)
+import Stackctl.ParameterOption
 import Stackctl.Prompt
 import Stackctl.Spec.Changes.Format
 import Stackctl.Spec.Discover
@@ -25,7 +26,8 @@
 import UnliftIO.Directory (createDirectoryIfMissing)
 
 data DeployOptions = DeployOptions
-  { sdoSaveChangeSets :: Maybe FilePath
+  { sdoParameters :: [Parameter]
+  , sdoSaveChangeSets :: Maybe FilePath
   , sdoDeployConfirmation :: DeployConfirmation
   , sdoClean :: Bool
   }
@@ -34,10 +36,12 @@
 
 runDeployOptions :: Parser DeployOptions
 runDeployOptions = DeployOptions
-  <$> optional (strOption
+  <$> many parameterOption
+  <*> optional (strOption
     (  long "save-change-sets"
     <> metavar "DIRECTORY"
     <> help "Save executed changesets to DIRECTORY"
+    <> action "directory"
     ))
   <*> flag DeployWithConfirmation DeployWithoutConfirmation
     (  long "no-confirm"
@@ -70,7 +74,7 @@
     withThreadContext ["stackName" .= stackSpecStackName spec] $ do
       handleRollbackComplete sdoDeployConfirmation $ stackSpecStackName spec
 
-      emChangeSet <- createChangeSet spec
+      emChangeSet <- createChangeSet spec sdoParameters
 
       case emChangeSet of
         Left err -> do
diff --git a/src/Stackctl/StackSpec.hs b/src/Stackctl/StackSpec.hs
--- a/src/Stackctl/StackSpec.hs
+++ b/src/Stackctl/StackSpec.hs
@@ -18,10 +18,11 @@
 
 import qualified CfnFlip
 import Data.Aeson
-import Data.Graph (graphFromEdges, topSort)
+import Data.List.Extra (nubOrdOn)
 import qualified Data.Yaml as Yaml
 import Stackctl.AWS
 import Stackctl.Action
+import Stackctl.Sort
 import Stackctl.StackSpecPath
 import Stackctl.StackSpecYaml
 import UnliftIO.Directory (createDirectoryIfMissing)
@@ -99,10 +100,6 @@
     throwString $ path <> " is invalid: " <> Yaml.prettyPrintParseException e
 
 -- | Create a Change Set between a Stack Specification and deployed state
---
--- We use @aws cloudformation deploy --no-execute-changeset@ because it handles
--- the create-or-update logic for us.
---
 createChangeSet
   :: ( MonadUnliftIO m
      , MonadResource m
@@ -111,21 +108,15 @@
      , HasAwsEnv env
      )
   => StackSpec
+  -> [Parameter]
   -> m (Either Text (Maybe ChangeSet))
-createChangeSet spec = awsCloudFormationCreateChangeSet
+createChangeSet spec parameters = awsCloudFormationCreateChangeSet
   (stackSpecStackName spec)
   (stackSpecTemplateFile spec)
-  (stackSpecParameters spec)
+  (nubOrdOn (^. parameter_parameterKey) $ parameters <> stackSpecParameters spec
+  )
   (stackSpecCapabilities spec)
   (stackSpecTags spec)
 
 sortStackSpecs :: [StackSpec] -> [StackSpec]
-sortStackSpecs specs = map nodeFromVertex $ reverse $ topSort graph
- where
-  (graph, tripleFromVertex, _) = graphFromEdges $ map tripleFromNode specs
-
-  nodeFromVertex = nodeFromTriple . tripleFromVertex
-
-  tripleFromNode n = (n, stackSpecStackName n, stackSpecDepends n)
-
-  nodeFromTriple (n, _, _) = n
+sortStackSpecs = sortByDependencies stackSpecStackName stackSpecDepends
diff --git a/stackctl.cabal b/stackctl.cabal
--- a/stackctl.cabal
+++ b/stackctl.cabal
@@ -1,6 +1,6 @@
 cabal-version:   1.18
 name:            stackctl
-version:         1.1.0.5
+version:         1.1.1.0
 license:         MIT
 license-file:    LICENSE
 copyright:       2022 Renaissance Learning Inc
@@ -36,8 +36,10 @@
         Stackctl.DirectoryOption
         Stackctl.FilterOption
         Stackctl.Options
+        Stackctl.ParameterOption
         Stackctl.Prelude
         Stackctl.Prompt
+        Stackctl.Sort
         Stackctl.Spec.Capture
         Stackctl.Spec.Cat
         Stackctl.Spec.Changes