diff --git a/.azure/modules/functionApp/appSettings.bicep b/.azure/modules/functionApp/appSettings.bicep
index 3de13e56b..37a7067a2 100644
--- a/.azure/modules/functionApp/appSettings.bicep
+++ b/.azure/modules/functionApp/appSettings.bicep
@@ -7,7 +7,7 @@ param appSettings object
 @description('The current app settings of the web application')
 param currentAppSettings object
 
-resource webApp 'Microsoft.Web/sites@2024-04-01' existing = {
+resource webApp 'Microsoft.Web/sites@2023-12-01' existing = {
   name: webAppName
 }
 
diff --git a/.azure/modules/functionApp/slackNotifier.bicep b/.azure/modules/functionApp/slackNotifier.bicep
index 6825d9abb..cce6842bd 100644
--- a/.azure/modules/functionApp/slackNotifier.bicep
+++ b/.azure/modules/functionApp/slackNotifier.bicep
@@ -97,7 +97,7 @@ resource applicationInsights 'Microsoft.Insights/components@2020-02-02' existing
 
 var functionAppNameMaxLength = 40
 var functionAppName = uniqueResourceName('${namePrefix}-slacknotifier-fa', functionAppNameMaxLength)
-resource functionApp 'Microsoft.Web/sites@2024-04-01' = {
+resource functionApp 'Microsoft.Web/sites@2023-12-01' = {
   name: functionAppName
   location: location
   kind: 'functionapp'