diff --git a/src/OpenIddict.Assets/project.json b/src/OpenIddict.Assets/project.json
index ef39640c..39fe1418 100644
--- a/src/OpenIddict.Assets/project.json
+++ b/src/OpenIddict.Assets/project.json
@@ -43,8 +43,8 @@
   "frameworks": {
     "net451": {
       "frameworkAssemblies": {
-        "System.Reflection": { "type": "build", "version": "4.0.0.0" },
-        "System.Runtime": { "type": "build", "version": "4.0.10.0" }
+        "System.Reflection": { "type": "build" },
+        "System.Runtime": { "type": "build" }
       }
     },
 
diff --git a/src/OpenIddict.Core/project.json b/src/OpenIddict.Core/project.json
index b4178614..09a2593c 100644
--- a/src/OpenIddict.Core/project.json
+++ b/src/OpenIddict.Core/project.json
@@ -40,8 +40,8 @@
   "frameworks": {
     "net451": {
       "frameworkAssemblies": {
-        "System.ComponentModel": { "type": "build", "version": "4.0.0.0" },
-        "System.Runtime": { "type": "build", "version": "4.0.10.0" }
+        "System.ComponentModel": { "type": "build" },
+        "System.Runtime": { "type": "build" }
       }
     },
 
diff --git a/src/OpenIddict.Mvc/project.json b/src/OpenIddict.Mvc/project.json
index cf38a57a..054db7f7 100644
--- a/src/OpenIddict.Mvc/project.json
+++ b/src/OpenIddict.Mvc/project.json
@@ -41,7 +41,7 @@
   "frameworks": {
     "net451": {
       "frameworkAssemblies": {
-        "System.Reflection": { "type": "build", "version": "4.0.0.0" }
+        "System.Reflection": { "type": "build" }
       }
     },