diff --git a/.github/scripts/pnpm-lock.yaml b/.github/scripts/pnpm-lock.yaml
index d406a4d..df02309 100644
--- a/.github/scripts/pnpm-lock.yaml
+++ b/.github/scripts/pnpm-lock.yaml
@@ -13,7 +13,7 @@ importers:
         version: 7.0.0
       '@types/node':
         specifier: ^22.0.0
-        version: 22.9.0
+        version: 22.10.1
       chalk:
         specifier: ^5.3.0
         version: 5.3.0
@@ -25,10 +25,10 @@ importers:
         version: 4.19.2
       typescript:
         specifier: ^5.4.3
-        version: 5.6.3
+        version: 5.7.2
       zx:
         specifier: ^8.0.0
-        version: 8.2.1
+        version: 8.2.4
 
 packages:
 
@@ -254,8 +254,8 @@ packages:
   '@types/jsonfile@6.1.4':
     resolution: {integrity: sha512-D5qGUYwjvnNNextdU59/+fI+spnwtTFmyQP0h+PfIOSkNfpU6AOICUOkm4i0OnSk+NyjdPJrxCDro0sJsWlRpQ==}
 
-  '@types/node@22.9.0':
-    resolution: {integrity: sha512-vuyHg81vvWA1Z1ELfvLko2c8f34gyA0zaic0+Rllc5lbCnbSyuvb2Oxpm6TAUAC/2xZN3QGqxBNggD1nNR2AfQ==}
+  '@types/node@22.10.1':
+    resolution: {integrity: sha512-qKgsUwfHZV2WCWLAnVP1JqnpE6Im6h3Y0+fYgMTasNQ7V++CBX5OT1as0g0f+OyubbFqhf6XVNIsmN4IIhEgGQ==}
 
   before-after-hook@3.0.2:
     resolution: {integrity: sha512-Nik3Sc0ncrMK4UUdXQmAnRtzmNQTAAXmXIopizwZ1W1t8QmfJj+zL4OA2I7XPTPW5z5TDqv4hRo/JzouDJnX3A==}
@@ -358,13 +358,13 @@ packages:
     engines: {node: '>=18.0.0'}
     hasBin: true
 
-  typescript@5.6.3:
-    resolution: {integrity: sha512-hjcS1mhfuyi4WW8IWtjP7brDrG2cuDZukyrYrSauoXGNgx0S7zceP07adYkJycEr56BOUTNPzbInooiN3fn1qw==}
+  typescript@5.7.2:
+    resolution: {integrity: sha512-i5t66RHxDvVN40HfDd1PsEThGNnlMCMT3jMUuoh9/0TaqWevNontacunWyN02LA9/fIbEWlcHZcgTKb9QoaLfg==}
     engines: {node: '>=14.17'}
     hasBin: true
 
-  undici-types@6.19.8:
-    resolution: {integrity: sha512-ve2KP6f/JnbPBFyobGHuerC9g1FYGn/F8n1LWTwNxCEzd6IfqTwUQcNXgEtmmQ6DlRrC1hrSrBnCZPokRrDHjw==}
+  undici-types@6.20.0:
+    resolution: {integrity: sha512-Ny6QZ2Nju20vw1SRHe3d9jVu6gJ+4e3+MMpqu7pqE5HT6WsTSlce++GQmK5UXS8mzV8DSYHrQH+Xrf2jVcuKNg==}
 
   undici@6.13.0:
     resolution: {integrity: sha512-Q2rtqmZWrbP8nePMq7mOJIN98M0fYvSgV89vwl/BQRT4mDOeY2GXZngfGpcBBhtky3woM7G24wZV3Q304Bv6cw==}
@@ -377,8 +377,8 @@ packages:
   universal-user-agent@7.0.2:
     resolution: {integrity: sha512-0JCqzSKnStlRRQfCdowvqy3cy0Dvtlb8xecj/H8JFZuCze4rwjPZQOgvFvn0Ws/usCHQFGpyr+pB9adaGwXn4Q==}
 
-  zx@8.2.1:
-    resolution: {integrity: sha512-E3TZRg76QC14RXU8LLKGCnsd8omfM220TJKU4O4R1YuitE4IzDB3cmX6+tF2iffJ8JtlWxBo35YS1TCmpINuaQ==}
+  zx@8.2.4:
+    resolution: {integrity: sha512-g9wVU+5+M+zVen/3IyAZfsZFmeqb6vDfjqFggakviz5uLK7OAejOirX+jeTOkyvAh/OYRlCgw+SdqzN7F61QVQ==}
     engines: {node: '>= 12.17.0'}
     hasBin: true
 
@@ -543,17 +543,17 @@ snapshots:
   '@types/fs-extra@11.0.4':
     dependencies:
       '@types/jsonfile': 6.1.4
-      '@types/node': 22.9.0
+      '@types/node': 22.10.1
     optional: true
 
   '@types/jsonfile@6.1.4':
     dependencies:
-      '@types/node': 22.9.0
+      '@types/node': 22.10.1
     optional: true
 
-  '@types/node@22.9.0':
+  '@types/node@22.10.1':
     dependencies:
-      undici-types: 6.19.8
+      undici-types: 6.20.0
 
   before-after-hook@3.0.2: {}
 
@@ -670,9 +670,9 @@ snapshots:
     optionalDependencies:
       fsevents: 2.3.3
 
-  typescript@5.6.3: {}
+  typescript@5.7.2: {}
 
-  undici-types@6.19.8: {}
+  undici-types@6.20.0: {}
 
   undici@6.13.0: {}
 
@@ -680,7 +680,7 @@ snapshots:
 
   universal-user-agent@7.0.2: {}
 
-  zx@8.2.1:
+  zx@8.2.4:
     optionalDependencies:
       '@types/fs-extra': 11.0.4
-      '@types/node': 22.9.0
+      '@types/node': 22.10.1
diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index bda2d8f..edaf83d 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1 +1 @@
-{"src/Altinn.Urn":"2.5.1","src/Altinn.Swashbuckle":"2.1.1","src/Altinn.Authorization.ProblemDetails":"3.0.1","src/Altinn.Authorization.ServiceDefaults":"2.8.0","src/Altinn.Cli":"1.1.0"}
+{"src/Altinn.Urn":"2.5.1","src/Altinn.Swashbuckle":"2.1.1","src/Altinn.Authorization.ProblemDetails":"3.1.0","src/Altinn.Authorization.ServiceDefaults":"2.8.0","src/Altinn.Cli":"1.1.0"}
diff --git a/src/Altinn.Authorization.ProblemDetails/CHANGELOG.md b/src/Altinn.Authorization.ProblemDetails/CHANGELOG.md
index c1b830b..72f2e88 100644
--- a/src/Altinn.Authorization.ProblemDetails/CHANGELOG.md
+++ b/src/Altinn.Authorization.ProblemDetails/CHANGELOG.md
@@ -1,5 +1,12 @@
 # Changelog
 
+## [3.1.0](https://github.com/Altinn/altinn-authorization-utils/compare/Altinn.Authorization.ProblemDetails-v3.0.1...Altinn.Authorization.ProblemDetails-v3.1.0) (2024-12-06)
+
+
+### Features
+
+* upgrade to .NET 9 ([#166](https://github.com/Altinn/altinn-authorization-utils/issues/166)) ([867c940](https://github.com/Altinn/altinn-authorization-utils/commit/867c9400ac8fd9a37c71d0af6386fbb414523267))
+
 ## [3.0.1](https://github.com/Altinn/altinn-authorization-utils/compare/Altinn.Authorization.ProblemDetails-v3.0.0...Altinn.Authorization.ProblemDetails-v3.0.1) (2024-08-27)
 
 
diff --git a/src/Altinn.Authorization.ProblemDetails/Version.props b/src/Altinn.Authorization.ProblemDetails/Version.props
index f8d75c1..e66a260 100644
--- a/src/Altinn.Authorization.ProblemDetails/Version.props
+++ b/src/Altinn.Authorization.ProblemDetails/Version.props
@@ -1,7 +1,7 @@
 <Project>
 
   <PropertyGroup>
-    <Version>0.0.0</Version>
+    <Version>3.1.0</Version>
   </PropertyGroup>
 
 </Project>
diff --git a/src/Altinn.Authorization.ProblemDetails/version.txt b/src/Altinn.Authorization.ProblemDetails/version.txt
index cb2b00e..fd2a018 100644
--- a/src/Altinn.Authorization.ProblemDetails/version.txt
+++ b/src/Altinn.Authorization.ProblemDetails/version.txt
@@ -1 +1 @@
-3.0.1
+3.1.0