diff --git a/src/Forbury.Integrations/API/v1/Clients/ForburyApiClient.cs b/src/Forbury.Integrations/API/v1/Clients/ForburyApiClient.cs
index 8e1b150..a0a9b07 100644
--- a/src/Forbury.Integrations/API/v1/Clients/ForburyApiClient.cs
+++ b/src/Forbury.Integrations/API/v1/Clients/ForburyApiClient.cs
@@ -17,6 +17,8 @@ namespace Forbury.Integrations.API.v1.Clients
 {
     public abstract class ForburyApiClient : IForburyApiClient
     {
+        const string ApplicationJson = "application/json";
+
         protected readonly HttpClient _httpClient;
 
         public ForburyApiClient(HttpClient httpClient)
@@ -64,7 +66,7 @@ protected async Task<TResult> PostAsync<TRequest, TResult>(string requestUri, TR
             var serializedBody = JsonConvert.SerializeObject(requestBody, new JsonSerializerSettings() { ContractResolver = new CamelCasePropertyNamesContractResolver() });
 
             HttpResponseMessage response = await _httpClient.PostAsync(requestUri,
-                new StringContent(serializedBody, Encoding.UTF8, MediaTypeNames.Application.Json),
+                new StringContent(serializedBody, Encoding.UTF8, ApplicationJson),
                 cancellationToken);
 
             await CatchResponseFailure(response);
diff --git a/src/Forbury.Integrations/API/v1/Extensions/ModelExtractContentTypeExtensions.cs b/src/Forbury.Integrations/API/v1/Extensions/ModelExtractContentTypeExtensions.cs
index 2b66b49..dcd86aa 100644
--- a/src/Forbury.Integrations/API/v1/Extensions/ModelExtractContentTypeExtensions.cs
+++ b/src/Forbury.Integrations/API/v1/Extensions/ModelExtractContentTypeExtensions.cs
@@ -8,12 +8,15 @@ public static class ModelExtractContentTypeExtensions
     {
         public static string ToMediaType(this ModelExtractFileType contentType)
         {
-            return contentType switch
+            switch (contentType)
             {
-                ModelExtractFileType.Pdf => MediaTypeNames.Application.Pdf,
-                ModelExtractFileType.Jpeg => MediaTypeNames.Image.Jpeg,
-                _ => throw new NotSupportedException("Content type not supported.")
-            };
+                case ModelExtractFileType.Pdf:
+                    return MediaTypeNames.Application.Pdf;
+                case ModelExtractFileType.Jpeg:
+                    return MediaTypeNames.Image.Jpeg;
+                default:
+                    throw new NotSupportedException("Content type not supported.");
+            }
         }
     }
 }
diff --git a/src/Forbury.Integrations/Forbury.Integrations.csproj b/src/Forbury.Integrations/Forbury.Integrations.csproj
index 9354477..8c72881 100644
--- a/src/Forbury.Integrations/Forbury.Integrations.csproj
+++ b/src/Forbury.Integrations/Forbury.Integrations.csproj
@@ -14,7 +14,7 @@
   <PropertyGroup>
     <AssemblyName>Forbury.Integrations</AssemblyName>
     <PackageId>Forbury.Integrations</PackageId>
-    <TargetFrameworks>netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
+    <TargetFrameworks>net48;netcoreapp3.1;net5.0;net6.0</TargetFrameworks>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
   </PropertyGroup>
 
diff --git a/src/Forbury.Integrations/Helpers/Extensions/HeaderDictionaryExtensions.cs b/src/Forbury.Integrations/Helpers/Extensions/HeaderDictionaryExtensions.cs
index 579cfe6..7cde6a8 100644
--- a/src/Forbury.Integrations/Helpers/Extensions/HeaderDictionaryExtensions.cs
+++ b/src/Forbury.Integrations/Helpers/Extensions/HeaderDictionaryExtensions.cs
@@ -26,7 +26,7 @@ public static bool IsSignatureCompatible(this IHeaderDictionary headers, string
 
             var receivedSignature =
                 headers[Constants.SignatureHeaderName].ToString()
-                    .Split("=");
+                    .Split('=');
 
             string computedSignature;
             switch (receivedSignature[0])