diff --git a/src/Generate-DockerImageVariantsHelpers/public/Automerge-DockerImageVariantsPR.ps1 b/src/Generate-DockerImageVariantsHelpers/public/Automerge-DockerImageVariantsPR.ps1
index 4bd3f7d..b268161 100644
--- a/src/Generate-DockerImageVariantsHelpers/public/Automerge-DockerImageVariantsPR.ps1
+++ b/src/Generate-DockerImageVariantsHelpers/public/Automerge-DockerImageVariantsPR.ps1
@@ -17,6 +17,7 @@ function Automerge-DockerImageVariantsPR {
             'Accept' = 'application/vnd.github+json'
             'Authorization' = "Bearer $env:GITHUB_TOKEN"
             'X-GitHub-Api-Version' = '2022-11-28'
+            'Content-Type' = 'application/json'
         }
         "Will automerge PR" | Write-Host
         if (!$WhatIfPreference) {
diff --git a/src/Generate-DockerImageVariantsHelpers/public/New-Release.ps1 b/src/Generate-DockerImageVariantsHelpers/public/New-Release.ps1
index 598d3c0..1f346da 100644
--- a/src/Generate-DockerImageVariantsHelpers/public/New-Release.ps1
+++ b/src/Generate-DockerImageVariantsHelpers/public/New-Release.ps1
@@ -19,6 +19,7 @@ function New-Release {
                 'Accept' = 'application/vnd.github+json'
                 'Authorization' = "Bearer $env:GITHUB_TOKEN"
                 'X-GitHub-Api-Version' = '2022-11-28'
+                'Content-Type' = 'application/json'
             }
             $owner = ({ git remote get-url origin } | Execute-Command) -replace 'https://github.com/([^/]+)/([^/]+)', '$1'
             $project = ({ git remote get-url origin } | Execute-Command) -replace 'https://github.com/([^/]+)/([^/]+)', '$2' -replace '\.git$', ''