diff --git a/src/ImageSharp.Drawing/project.json b/src/ImageSharp.Drawing/project.json
index 2a199b7d7..04a560170 100644
--- a/src/ImageSharp.Drawing/project.json
+++ b/src/ImageSharp.Drawing/project.json
@@ -88,7 +88,7 @@
         "System.Threading.Tasks.Parallel": "4.0.0"
       },
       "frameworkAssemblies": {
-        "System.Runtime": "4.0.20.0",
+        "System.Runtime": { "type": "build" },
         "System.Numerics": "4.0.0.0",
         "System.Numerics.Vectors": "4.0.0.0"
       }
diff --git a/src/ImageSharp.Formats.Bmp/project.json b/src/ImageSharp.Formats.Bmp/project.json
index 30eaeb7a7..575e414aa 100644
--- a/src/ImageSharp.Formats.Bmp/project.json
+++ b/src/ImageSharp.Formats.Bmp/project.json
@@ -84,7 +84,7 @@
         "System.Threading.Tasks.Parallel": "4.0.0"
       },
       "frameworkAssemblies": {
-        "System.Runtime": "4.0.20.0",
+        "System.Runtime": { "type": "build" },
         "System.Numerics": "4.0.0.0",
         "System.Numerics.Vectors": "4.0.0.0"
       }
diff --git a/src/ImageSharp.Formats.Gif/project.json b/src/ImageSharp.Formats.Gif/project.json
index 57499f165..e12d3c733 100644
--- a/src/ImageSharp.Formats.Gif/project.json
+++ b/src/ImageSharp.Formats.Gif/project.json
@@ -84,7 +84,7 @@
         "System.Threading.Tasks.Parallel": "4.0.0"
       },
       "frameworkAssemblies": {
-        "System.Runtime": "4.0.20.0",
+        "System.Runtime": { "type": "build" },
         "System.Numerics": "4.0.0.0",
         "System.Numerics.Vectors": "4.0.0.0"
       }
diff --git a/src/ImageSharp.Formats.Jpeg/project.json b/src/ImageSharp.Formats.Jpeg/project.json
index 45fdf4a37..de16f6c1c 100644
--- a/src/ImageSharp.Formats.Jpeg/project.json
+++ b/src/ImageSharp.Formats.Jpeg/project.json
@@ -84,7 +84,7 @@
         "System.Threading.Tasks.Parallel": "4.0.0"
       },
       "frameworkAssemblies": {
-        "System.Runtime": "4.0.20.0",
+        "System.Runtime": { "type": "build" },
         "System.Numerics": "4.0.0.0",
         "System.Numerics.Vectors": "4.0.0.0"
       }
diff --git a/src/ImageSharp.Formats.Png/project.json b/src/ImageSharp.Formats.Png/project.json
index 4fa8aefab..d029f1d2f 100644
--- a/src/ImageSharp.Formats.Png/project.json
+++ b/src/ImageSharp.Formats.Png/project.json
@@ -84,7 +84,7 @@
         "System.Threading.Tasks.Parallel": "4.0.0"
       },
       "frameworkAssemblies": {
-        "System.Runtime": "4.0.20.0",
+        "System.Runtime": { "type": "build" },
         "System.Numerics": "4.0.0.0",
         "System.Numerics.Vectors": "4.0.0.0"
       }
diff --git a/src/ImageSharp.Processing/project.json b/src/ImageSharp.Processing/project.json
index 392e6f232..2ff224fa4 100644
--- a/src/ImageSharp.Processing/project.json
+++ b/src/ImageSharp.Processing/project.json
@@ -84,7 +84,7 @@
         "System.Threading.Tasks.Parallel": "4.0.0"
       },
       "frameworkAssemblies": {
-        "System.Runtime": "4.0.20.0",
+        "System.Runtime": { "type": "build" },
         "System.Numerics": "4.0.0.0",
         "System.Numerics.Vectors": "4.0.0.0"
       }
diff --git a/src/ImageSharp/project.json b/src/ImageSharp/project.json
index babf3dccc..117d32090 100644
--- a/src/ImageSharp/project.json
+++ b/src/ImageSharp/project.json
@@ -80,7 +80,7 @@
         "System.Threading.Tasks.Parallel": "4.0.0"
       },
       "frameworkAssemblies": {
-        "System.Runtime": "4.0.20.0",
+        "System.Runtime": { "type": "build" },
         "System.Numerics": "4.0.0.0",
         "System.Numerics.Vectors": "4.0.0.0"
       }