diff --git a/.idea/.idea.Graeae/.idea/.gitignore b/.idea/.idea.Graeae/.idea/.gitignore
new file mode 100644
index 0000000..4746bbf
--- /dev/null
+++ b/.idea/.idea.Graeae/.idea/.gitignore
@@ -0,0 +1,13 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Rider ignored files
+/modules.xml
+/contentModel.xml
+/projectSettingsUpdater.xml
+/.idea.Graeae.iml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/Graeae.AspNet.Analyzer/Graeae.AspNet.Analyzer.csproj b/Graeae.AspNet.Analyzer/Graeae.AspNet.Analyzer.csproj
index 02d0e7d..f1ba352 100644
--- a/Graeae.AspNet.Analyzer/Graeae.AspNet.Analyzer.csproj
+++ b/Graeae.AspNet.Analyzer/Graeae.AspNet.Analyzer.csproj
@@ -25,7 +25,7 @@
     <PackageReleaseNotes>Release notes can be found at https://github.com/gregsdennis/Graeae</PackageReleaseNotes>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <DocumentationFile>Graeae.AspNet.xml</DocumentationFile>
-    <Version>0.1.0-preview2</Version>
+    <Version>0.1.0-preview3</Version>
     <FileVersion>0.1.0</FileVersion>
     <AssemblyVersion>0.1.0.0</AssemblyVersion>
     <IncludeSymbols>false</IncludeSymbols>
diff --git a/Graeae.AspNet/Graeae.AspNet.csproj b/Graeae.AspNet/Graeae.AspNet.csproj
index 96a68b1..f98e6a6 100644
--- a/Graeae.AspNet/Graeae.AspNet.csproj
+++ b/Graeae.AspNet/Graeae.AspNet.csproj
@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFrameworks>net8.0</TargetFrameworks>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <PackageId>Graeae.AspNet</PackageId>
@@ -17,7 +17,7 @@
     <PackageReleaseNotes>Release notes can be found at https://github.com/gregsdennis/Graeae</PackageReleaseNotes>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <DocumentationFile>Graeae.AspNet.xml</DocumentationFile>
-    <Version>0.1.0-preview1</Version>
+    <Version>0.1.0-preview2</Version>
     <FileVersion>0.1.0</FileVersion>
     <AssemblyVersion>0.1.0.0</AssemblyVersion>
     <IncludeSymbols>true</IncludeSymbols>
diff --git a/Graeae.Models/Graeae.Models.csproj b/Graeae.Models/Graeae.Models.csproj
index 376de15..8ce6b42 100644
--- a/Graeae.Models/Graeae.Models.csproj
+++ b/Graeae.Models/Graeae.Models.csproj
@@ -19,9 +19,9 @@
     <PackageReleaseNotes>$([System.IO.File]::ReadAllText("$(MSBuildProjectDirectory)/../RELEASE_NOTES.md"))</PackageReleaseNotes>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <DocumentationFile>Graeae.Models.xml</DocumentationFile>
-    <Version>0.3.4</Version>
-    <FileVersion>0.3.4</FileVersion>
-    <AssemblyVersion>0.3.4.0</AssemblyVersion>
+    <Version>0.3.5</Version>
+    <FileVersion>0.3.5</FileVersion>
+    <AssemblyVersion>0.3.5.0</AssemblyVersion>
     <IncludeSymbols>true</IncludeSymbols>
     <SymbolPackageFormat>snupkg</SymbolPackageFormat>
     <PublishRepositoryUrl>true</PublishRepositoryUrl>
diff --git a/Graeae.Models/OAuthFlow.cs b/Graeae.Models/OAuthFlow.cs
index 256a9d9..c0f94c0 100644
--- a/Graeae.Models/OAuthFlow.cs
+++ b/Graeae.Models/OAuthFlow.cs
@@ -21,11 +21,11 @@ public class OAuthFlow : IRefTargetContainer
 	/// <summary>
 	/// Gets the authorization URL.
 	/// </summary>
-	public Uri AuthorizationUrl { get; }
+	public Uri? AuthorizationUrl { get; set; }
 	/// <summary>
 	/// Gets the token URL.
 	/// </summary>
-	public Uri TokenUrl { get; }
+	public Uri? TokenUrl { get; set; }
 	/// <summary>
 	/// Gets or sets the refresh token URL.
 	/// </summary>
@@ -42,13 +42,9 @@ public class OAuthFlow : IRefTargetContainer
 	/// <summary>
 	/// Creates a new <see cref="OAuthFlow"/>
 	/// </summary>
-	/// <param name="authorizationUrl">The authorization URL</param>
-	/// <param name="tokenUrl">The token URL</param>
 	/// <param name="scopes">The scopes</param>
-	public OAuthFlow(Uri authorizationUrl, Uri tokenUrl, Dictionary<string, string> scopes)
+	public OAuthFlow(Dictionary<string, string> scopes)
 	{
-		AuthorizationUrl = authorizationUrl;
-		TokenUrl = tokenUrl;
 		Scopes = scopes;
 	}
 
@@ -58,10 +54,10 @@ internal static OAuthFlow FromNode(JsonNode? node)
 			throw new JsonException("Expected an object");
 
 		var flow = new OAuthFlow(
-			obj.ExpectUri("authorizationUrl", "oauth flow"),
-			obj.ExpectUri("tokenUrl", "oauth flow"),
 			obj.ExpectMap("scopes", "oauth flow", x => x is JsonValue v && v.TryGetValue(out string? s) ? s : throw new JsonException("scopes must be strings")))
 		{
+            AuthorizationUrl = obj.MaybeUri("authorizationUrl", "oauth flow"),
+            TokenUrl = obj.MaybeUri("tokenUrl", "oauth flow"),
 			RefreshUrl = obj.MaybeUri("refreshUrl", "oauth flow"),
 			ExtensionData = ExtensionData.FromNode(obj)
 		};
@@ -75,11 +71,10 @@ internal static OAuthFlow FromNode(JsonNode? node)
 	{
 		if (flow == null) return null;
 
-		var obj = new JsonObject
-		{
-			["authorizationUrl"] = flow.AuthorizationUrl.ToString(),
-			["tokenUrl"] = flow.TokenUrl.ToString()
-		};
+		var obj = new JsonObject();
+		obj.MaybeAdd("authorizationUrl", flow.AuthorizationUrl?.ToString());
+		obj.MaybeAdd("tokenUrl", flow.TokenUrl?.ToString());
+		obj.MaybeAdd("refreshUrl", flow.RefreshUrl?.ToString());
 
 		var scopes = new JsonObject();
 		foreach (var kvp in flow.Scopes)
@@ -88,7 +83,6 @@ internal static OAuthFlow FromNode(JsonNode? node)
 		}
 		obj.Add("scopes", scopes);
 
-		obj.MaybeAdd("refreshUrl", flow.RefreshUrl?.ToString());
 		obj.AddExtensions(flow.ExtensionData);
 
 		return obj;
diff --git a/Graeae.Models/OAuthFlowCollection.cs b/Graeae.Models/OAuthFlowCollection.cs
index e6597e1..8ea6e52 100644
--- a/Graeae.Models/OAuthFlowCollection.cs
+++ b/Graeae.Models/OAuthFlowCollection.cs
@@ -52,6 +52,18 @@ internal static OAuthFlowCollection FromNode(JsonNode? node)
 			AuthorizationCode = obj.Maybe("authorizationCode", OAuthFlow.FromNode),
 			ExtensionData = ExtensionData.FromNode(obj)
 		};
+        
+        if (flows.Implicit is not null && flows.Implicit.AuthorizationUrl is null)
+            throw new JsonException($"`authorizationUrl` is required for implicit oauth flow object");
+        if (flows.Password is not null && flows.Password.TokenUrl is null)
+            throw new JsonException($"`tokenUrl` is required for password oauth flow object");
+        if (flows.ClientCredentials is not null && flows.ClientCredentials.TokenUrl is null)
+            throw new JsonException($"`tokenUrl` is required for clientCredentials oauth flow object");
+        if (flows.AuthorizationCode is not null)
+        {
+            if (flows.AuthorizationCode.AuthorizationUrl is null) throw new JsonException($"`authorizationUrl` is required for authorizationCode oauth flow object");
+            if (flows.AuthorizationCode.TokenUrl is null) throw new JsonException($"`tokenUrl` is required for authorizationCode oauth flow object");
+        }
 
 		obj.ValidateNoExtraKeys(KnownKeys, flows.ExtensionData?.Keys);
 
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 6b47132..e4ca06f 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,3 +1,5 @@
+
+
 [0.3.4](https://github.com/gregsdennis/Graeae/commit/f3f6bb0c4ec29879f8fb24573900f51f61e0bfae) (v0.3.3 redacted)
 
 - Added .Net Standard 2.0 support.