diff --git a/.gitignore b/.gitignore
index cb1f821..79db54f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -185,3 +185,7 @@ $RECYCLE.BIN/
 **/*.sln.ide
 
 travis-ci/accounts.json
+.vs/Square.Connect/v15/Server/sqlite3/db.lock
+.vs/Square.Connect/v15/Server/sqlite3/storage.ide
+.vs/Square.Connect/v15/Server/sqlite3/storage.ide-shm
+.vs/Square.Connect/v15/Server/sqlite3/storage.ide-wal
diff --git a/Square.Connect.sln b/Square.Connect.sln
index d8c7825..d424f0b 100644
--- a/Square.Connect.sln
+++ b/Square.Connect.sln
@@ -1,27 +1,30 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
-# Visual Studio 2012
-VisualStudioVersion = 12.0.0.0
-MinimumVisualStudioVersion = 10.0.0.1
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Square.Connect", "src\Square.Connect\Square.Connect.csproj", "{4A65C772-5862-4E64-B742-0C6997700CD8}"
+# Visual Studio 15
+VisualStudioVersion = 15.0.27004.2009
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Square.Connect", "src\Square.Connect\Square.Connect.csproj", "{4A65C772-5862-4E64-B742-0C6997700CD8}"
 EndProject
-Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Square.Connect.Test", "src\Square.Connect.Test\Square.Connect.Test.csproj", "{19F1DEBC-DE5E-4517-8062-F000CD499087}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Square.Connect.Test", "src\Square.Connect.Test\Square.Connect.Test.csproj", "{19F1DEBC-DE5E-4517-8062-F000CD499087}"
 EndProject
 Global
-GlobalSection(SolutionConfigurationPlatforms) = preSolution
-Debug|Any CPU = Debug|Any CPU
-Release|Any CPU = Release|Any CPU
-EndGlobalSection
-GlobalSection(ProjectConfigurationPlatforms) = postSolution
-{4A65C772-5862-4E64-B742-0C6997700CD8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-{4A65C772-5862-4E64-B742-0C6997700CD8}.Debug|Any CPU.Build.0 = Debug|Any CPU
-{4A65C772-5862-4E64-B742-0C6997700CD8}.Release|Any CPU.ActiveCfg = Release|Any CPU
-{4A65C772-5862-4E64-B742-0C6997700CD8}.Release|Any CPU.Build.0 = Release|Any CPU
-{19F1DEBC-DE5E-4517-8062-F000CD499087}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-{19F1DEBC-DE5E-4517-8062-F000CD499087}.Debug|Any CPU.Build.0 = Debug|Any CPU
-{19F1DEBC-DE5E-4517-8062-F000CD499087}.Release|Any CPU.ActiveCfg = Release|Any CPU
-{19F1DEBC-DE5E-4517-8062-F000CD499087}.Release|Any CPU.Build.0 = Release|Any CPU
-EndGlobalSection
-GlobalSection(SolutionProperties) = preSolution
-HideSolutionNode = FALSE
-EndGlobalSection
-EndGlobal
\ No newline at end of file
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{4A65C772-5862-4E64-B742-0C6997700CD8}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{4A65C772-5862-4E64-B742-0C6997700CD8}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{4A65C772-5862-4E64-B742-0C6997700CD8}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{4A65C772-5862-4E64-B742-0C6997700CD8}.Release|Any CPU.Build.0 = Release|Any CPU
+		{19F1DEBC-DE5E-4517-8062-F000CD499087}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{19F1DEBC-DE5E-4517-8062-F000CD499087}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{19F1DEBC-DE5E-4517-8062-F000CD499087}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{19F1DEBC-DE5E-4517-8062-F000CD499087}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {23F077E7-F353-4F5F-8B8B-2531C8E8F226}
+	EndGlobalSection
+EndGlobal
diff --git a/src/Square.Connect/Model/V1Item.cs b/src/Square.Connect/Model/V1Item.cs
index a51e448..d4bee3f 100644
--- a/src/Square.Connect/Model/V1Item.cs
+++ b/src/Square.Connect/Model/V1Item.cs
@@ -75,7 +75,13 @@ public enum ColorEnum
             /// </summary>
             [EnumMember(Value = "4ab200")]
             _4ab200,
-            
+
+            /// <summary>
+            /// Enum _13B1BF for 13B1BF
+            /// </summary>
+            [EnumMember(Value = "13B1BF")]
+            _13B1BF,
+
             /// <summary>
             /// Enum _0b8000 for "0b8000"
             /// </summary>
diff --git a/src/Square.Connect/Model/V1Tender.cs b/src/Square.Connect/Model/V1Tender.cs
index dbd9cb8..6c3775e 100644
--- a/src/Square.Connect/Model/V1Tender.cs
+++ b/src/Square.Connect/Model/V1Tender.cs
@@ -109,7 +109,7 @@ public enum CardBrandEnum
             /// <summary>
             /// Enum MASTERCARD for "MASTERCARD"
             /// </summary>
-            [EnumMember(Value = "MASTERCARD")]
+            [EnumMember(Value = "MASTER_CARD")]
             MASTERCARD,
             
             /// <summary>