diff --git a/eng/Versions.props b/eng/Versions.props
index 01a8ec5265..9af6ace6c6 100644
--- a/eng/Versions.props
+++ b/eng/Versions.props
@@ -102,6 +102,9 @@
     <MicrosoftExtensionsValueStopwatchSourcesPackageVersion>3.0.0-preview.19105.4</MicrosoftExtensionsValueStopwatchSourcesPackageVersion>
     <MicrosoftExtensionsWebEncodersPackageVersion>3.0.0-preview.19105.4</MicrosoftExtensionsWebEncodersPackageVersion>
     <MicrosoftJSInteropPackageVersion>3.0.0-preview.19105.4</MicrosoftJSInteropPackageVersion>
+    <!-- When updating this, ensure you also update src/Components/Browser.JS/src/package.json to reference the corresponding version of @dotnet/jsinterop -->
+    <MonoWebAssemblyInteropPackageVersion>3.0.0-preview.19105.4</MonoWebAssemblyInteropPackageVersion>
+
     <!-- Packages from aspnet/EntityFrameworkCore -->
     <dotnetefPackageVersion>3.0.0-preview.19080.1</dotnetefPackageVersion>
     <MicrosoftEntityFrameworkCoreInMemoryPackageVersion>3.0.0-preview.19080.1</MicrosoftEntityFrameworkCoreInMemoryPackageVersion>
@@ -161,8 +164,6 @@
     <WindowsAzureStoragePackageVersion>8.1.4</WindowsAzureStoragePackageVersion>
     <!-- Dependencies for Blazor. -->
     <MicrosoftAspNetCoreBlazorMonoPackageVersion>0.8.0-preview-20190204.1</MicrosoftAspNetCoreBlazorMonoPackageVersion>
-    <!-- When updating this, ensure you also update src/Components/Browser.JS/src/package.json to reference the corresponding version of @dotnet/jsinterop -->
-    <MonoWebAssemblyInteropPackageVersion>0.8.0-preview1-20181126.4</MonoWebAssemblyInteropPackageVersion>
     <!-- Packages from 2.1/2.2 branches used for site extension build -->
     <MicrosoftAspNetCoreAzureAppServicesSiteExtension21PackageVersion>2.1.1</MicrosoftAspNetCoreAzureAppServicesSiteExtension21PackageVersion>
     <MicrosoftAspNetCoreAzureAppServicesSiteExtension22PackageVersion>2.2.0</MicrosoftAspNetCoreAzureAppServicesSiteExtension22PackageVersion>
diff --git a/src/Components/Browser.JS/src/package-lock.json b/src/Components/Browser.JS/src/package-lock.json
index 3272ef3e77..57af8cb83d 100644
--- a/src/Components/Browser.JS/src/package-lock.json
+++ b/src/Components/Browser.JS/src/package-lock.json
@@ -1546,12 +1546,14 @@
         "balanced-match": {
           "version": "1.0.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "brace-expansion": {
           "version": "1.1.11",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "balanced-match": "^1.0.0",
             "concat-map": "0.0.1"
@@ -1571,12 +1573,14 @@
         "concat-map": {
           "version": "0.0.1",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "console-control-strings": {
           "version": "1.1.0",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "core-util-is": {
           "version": "1.0.2",
@@ -1693,7 +1697,8 @@
         "inherits": {
           "version": "2.0.3",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "ini": {
           "version": "1.3.5",
@@ -1719,6 +1724,7 @@
           "version": "3.0.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "brace-expansion": "^1.1.7"
           }
@@ -1726,12 +1732,14 @@
         "minimist": {
           "version": "0.0.8",
           "bundled": true,
-          "dev": true
+          "dev": true,
+          "optional": true
         },
         "minipass": {
           "version": "2.2.4",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "safe-buffer": "^5.1.1",
             "yallist": "^3.0.0"
@@ -1750,6 +1758,7 @@
           "version": "0.5.1",
           "bundled": true,
           "dev": true,
+          "optional": true,
           "requires": {
             "minimist": "0.0.8"
           }