diff --git a/common/code-upgrade-samples/az/dynamic-parameters-test1.ps1 b/common/code-upgrade-samples/az/dynamic-parameters-test1.ps1
index 4f7b2fa..817ffdc 100644
--- a/common/code-upgrade-samples/az/dynamic-parameters-test1.ps1
+++ b/common/code-upgrade-samples/az/dynamic-parameters-test1.ps1
@@ -3,5 +3,5 @@
 New-AzResourceGroupDeployment -ResourceGroupName "ContosoEngineering" `
     -TemplateFile "D:\Azure\Templates\EngineeringSite.json" `
     -TemplateParameterFile "D:\Azure\Templates\EngSiteParms.json" `
-    - "test1" `
-    - "test2"
+    -DynamicUserParam1 "test1" `
+    -DynamicUserParam2 "test2"
diff --git a/powershell-module/Az.Tools.Migration/Az.Tools.Migration.psd1 b/powershell-module/Az.Tools.Migration/Az.Tools.Migration.psd1
index d71a7a0..7fa41f1 100644
--- a/powershell-module/Az.Tools.Migration/Az.Tools.Migration.psd1
+++ b/powershell-module/Az.Tools.Migration/Az.Tools.Migration.psd1
@@ -3,7 +3,7 @@
     RootModule = 'Az.Tools.Migration.psm1'
 
     # Version number of this module.
-    ModuleVersion = '1.1.0'
+    ModuleVersion = '1.1.1'
 
     # Supported PSEditions
     CompatiblePSEditions = 'Core', 'Desktop'
@@ -108,11 +108,7 @@
             # IconUri = ''
 
             # ReleaseNotes of this module
-            ReleaseNotes = '* Upgrade Az version to 5.6.0
-            * Fixed a bug where New-AzUpgradeModulePlan throws errors when analyzing hashtable code (issue #73).
-            * Updated scanning results for Az cmdlets that implement dynamic parameters to use clearer warnings.
-            * Updated Get-AzUpgradeCmdletSpec to improve performance.
-            * Updated quickstart guide to remove outdated guidance on splatted parameter detection.'
+            ReleaseNotes = '* Fixed a bug in Invoke-AzUpgradeModulePlan where dynamic parameters are incorrectly updated (issue #81).'
         }
     }
 
diff --git a/powershell-module/Az.Tools.Migration/Functions/Private/Invoke-ModuleUpgradeStep.ps1 b/powershell-module/Az.Tools.Migration/Functions/Private/Invoke-ModuleUpgradeStep.ps1
index 960bc4f..f4a28f7 100644
--- a/powershell-module/Az.Tools.Migration/Functions/Private/Invoke-ModuleUpgradeStep.ps1
+++ b/powershell-module/Az.Tools.Migration/Functions/Private/Invoke-ModuleUpgradeStep.ps1
@@ -50,22 +50,30 @@ function Invoke-ModuleUpgradeStep
                     -StartOffset $Step.SourceCommand.StartOffset -EndOffset $Step.SourceCommand.EndOffset
 
                 # replacement code
-                $null = $FileContent.Remove($Step.SourceCommand.StartOffset, ($Step.SourceCommand.EndOffset - $Step.SourceCommand.StartOffset));
-                $null = $FileContent.Insert($Step.SourceCommand.StartOffset, $Step.Replacement);
+                $null = $FileContent.Remove($Step.SourceCommand.StartOffset, ($Step.SourceCommand.EndOffset - $Step.SourceCommand.StartOffset))
+                $null = $FileContent.Insert($Step.SourceCommand.StartOffset, $Step.Replacement)
             }
             "CmdletParameter"
             {
-                Write-Verbose -Message ("[{0}] Updating CmdletParameter {1} to {2}." `
-                        -f $Step.Location, $Step.Original, $Step.Replacement)
+                if ([System.String]::IsNullOrWhiteSpace($Step.Replacement) -eq $false)
+                {
+                    Write-Verbose -Message ("[{0}] Updating CmdletParameter {1} to {2}." `
+                            -f $Step.Location, $Step.Original, $Step.Replacement)
 
-                # safety check
-                # ensure that the file offsets are an exact match.
-                Confirm-StringBuilderSubstring -FileContent $FileContent -Substring $Step.Original `
-                    -StartOffset $Step.SourceCommandParameter.StartOffset -EndOffset $Step.SourceCommandParameter.EndOffset
+                    # safety check
+                    # ensure that the file offsets are an exact match.
+                    Confirm-StringBuilderSubstring -FileContent $FileContent -Substring $Step.Original `
+                        -StartOffset $Step.SourceCommandParameter.StartOffset -EndOffset $Step.SourceCommandParameter.EndOffset
 
-                # replacement code
-                $null = $FileContent.Remove($Step.SourceCommandParameter.StartOffset, ($Step.SourceCommandParameter.EndOffset - $Step.SourceCommandParameter.StartOffset));
-                $null = $FileContent.Insert($Step.SourceCommandParameter.StartOffset, $Step.Replacement);
+                    # replacement code
+                    $null = $FileContent.Remove($Step.SourceCommandParameter.StartOffset, ($Step.SourceCommandParameter.EndOffset - $Step.SourceCommandParameter.StartOffset))
+                    $null = $FileContent.Insert($Step.SourceCommandParameter.StartOffset, $Step.Replacement)
+                }
+                else
+                {
+                    Write-Verbose -Message ("[{0}] Skipping CmdletParameter {1}, it has no automated replacement." `
+                        -f $Step.Location, $Step.Original)
+                }
             }
             default
             {
diff --git a/powershell-module/ChangeLog.md b/powershell-module/ChangeLog.md
index 99cbc05..f0ae178 100644
--- a/powershell-module/ChangeLog.md
+++ b/powershell-module/ChangeLog.md
@@ -19,6 +19,9 @@
 -->
 ## Upcoming Release
 
+## 1.1.1
+* Fixed a bug in Invoke-AzUpgradeModulePlan where dynamic parameters are incorrectly updated (issue #81).
+
 ## 1.1.0
 * Upgrade Az version to 5.6.0
 * Fixed a bug where New-AzUpgradeModulePlan throws errors when analyzing hashtable code (issue #73).