diff --git a/src/Microsoft.AspNetCore.JsonPatch/Adapters/ObjectAdapter.cs b/src/Microsoft.AspNetCore.JsonPatch/Adapters/ObjectAdapter.cs
index aeae454fa9..b70ff697c3 100644
--- a/src/Microsoft.AspNetCore.JsonPatch/Adapters/ObjectAdapter.cs
+++ b/src/Microsoft.AspNetCore.JsonPatch/Adapters/ObjectAdapter.cs
@@ -1023,14 +1023,14 @@ namespace Microsoft.AspNetCore.JsonPatch.Adapters
         {
             if (IsGenericListType(type))
             {
-                return type.GetGenericArguments()[0];
+                return type.GetTypeInfo().GenericTypeArguments[0];
             }
 
             foreach (Type interfaceType in type.GetTypeInfo().ImplementedInterfaces)
             {
                 if (IsGenericListType(interfaceType))
                 {
-                    return interfaceType.GetGenericArguments()[0];
+                    return interfaceType.GetTypeInfo().GenericTypeArguments[0];
                 }
             }
 
diff --git a/src/Microsoft.AspNetCore.JsonPatch/Converters/TypedJsonPatchDocumentConverter.cs b/src/Microsoft.AspNetCore.JsonPatch/Converters/TypedJsonPatchDocumentConverter.cs
index a150bd0478..292a3be556 100644
--- a/src/Microsoft.AspNetCore.JsonPatch/Converters/TypedJsonPatchDocumentConverter.cs
+++ b/src/Microsoft.AspNetCore.JsonPatch/Converters/TypedJsonPatchDocumentConverter.cs
@@ -27,7 +27,7 @@ namespace Microsoft.AspNetCore.JsonPatch.Converters
                     return null;
                 }
 
-                var genericType = objectType.GetGenericArguments()[0];
+                var genericType = objectType.GetTypeInfo().GenericTypeArguments[0];
 
                 // load jObject
                 var jObject = JArray.Load(reader);
diff --git a/src/Microsoft.AspNetCore.JsonPatch/Helpers/ObjectTreeAnalyisResult.cs b/src/Microsoft.AspNetCore.JsonPatch/Helpers/ObjectTreeAnalyisResult.cs
index 4d083bd073..782859ad5f 100644
--- a/src/Microsoft.AspNetCore.JsonPatch/Helpers/ObjectTreeAnalyisResult.cs
+++ b/src/Microsoft.AspNetCore.JsonPatch/Helpers/ObjectTreeAnalyisResult.cs
@@ -141,7 +141,6 @@ namespace Microsoft.AspNetCore.JsonPatch.Helpers
             }
             else if (targetObject is IList)
             {
-                System.Diagnostics.Debugger.Launch();
                 UseDynamicLogic = false;
 
                 int index;
diff --git a/src/Microsoft.AspNetCore.JsonPatch/project.json b/src/Microsoft.AspNetCore.JsonPatch/project.json
index 6e66884725..abfc19cba3 100644
--- a/src/Microsoft.AspNetCore.JsonPatch/project.json
+++ b/src/Microsoft.AspNetCore.JsonPatch/project.json
@@ -16,13 +16,14 @@
     "Newtonsoft.Json": "8.0.2"
   },
   "frameworks": {
-    "net451": {},
-    "netstandard1.3": {
+    "netstandard1.1": {
       "dependencies": {
         "Microsoft.CSharp": "4.0.1-*",
         "System.Collections.Concurrent": "4.0.12-*",
         "System.ComponentModel.TypeConverter": "4.0.1-*",
+        "System.Diagnostics.Debug": "4.0.11-*",
         "System.Globalization": "4.0.11-*",
+        "System.Linq": "4.1.0-*",
         "System.Reflection.Extensions": "4.0.1-*",
         "System.Resources.ResourceManager": "4.0.1-*",
         "System.Runtime.Extensions": "4.1.0-*",
@@ -30,7 +31,7 @@
         "System.Text.Encoding.Extensions": "4.0.11-*"
       },
       "imports": [
-        "dotnet5.4",
+        "dotnet5.2",
         "portable-net451+win8"
       ]
     }
diff --git a/test/Microsoft.AspNetCore.JsonPatch.Test/project.json b/test/Microsoft.AspNetCore.JsonPatch.Test/project.json
index 6bfaeafb67..c8772f21fb 100644
--- a/test/Microsoft.AspNetCore.JsonPatch.Test/project.json
+++ b/test/Microsoft.AspNetCore.JsonPatch.Test/project.json
@@ -22,11 +22,12 @@
     },
     "net451": {
       "frameworkAssemblies": {
-        "System.Runtime": "",
-        "System.Threading.Tasks": ""
+        "System.Linq.Expressions": {"type": "build"},
+        "System.Threading.Tasks": { "type": "build" }
       },
       "dependencies": {
         "Moq": "4.2.1312.1622",
+        "System.Runtime": "4.1.0-*",
         "xunit.runner.console": "2.1.0"
       }
     }