diff --git a/src/Microsoft.Extensions.Globalization.CultureInfoCache/project.json b/src/Microsoft.Extensions.Globalization.CultureInfoCache/project.json
index bb2facc13f..d1a2f39492 100644
--- a/src/Microsoft.Extensions.Globalization.CultureInfoCache/project.json
+++ b/src/Microsoft.Extensions.Globalization.CultureInfoCache/project.json
@@ -13,8 +13,8 @@
     "net451": {},
     "dotnet5.4": {
       "dependencies": {
-        "System.Collections.Concurrent": "4.0.11-*",
-        "System.Linq": "4.0.1-*"
+        "System.Collections.Concurrent": "4.0.12-*",
+        "System.Linq": "4.0.2-*"
       }
     }
   }
diff --git a/src/Microsoft.Extensions.Localization/project.json b/src/Microsoft.Extensions.Localization/project.json
index 740cc2f1da..c916070413 100644
--- a/src/Microsoft.Extensions.Localization/project.json
+++ b/src/Microsoft.Extensions.Localization/project.json
@@ -19,7 +19,7 @@
     "net451": {},
     "dotnet5.4": {
       "dependencies": {
-        "System.Collections.Concurrent": "4.0.11-*",
+        "System.Collections.Concurrent": "4.0.12-*",
         "System.Resources.Reader": "4.0.0-*"
       }
     }