diff --git a/src/Compilers/CSharp/CscCore/csc.exe.config b/src/Compilers/CSharp/CscCore/csc.exe.config
index b3e28373c43f6bc041f0fb9bb450c8851a93e351..e8912d2a0bf474f6f046c6e9d3eceae2046e44f5 100644
--- a/src/Compilers/CSharp/CscCore/csc.exe.config
+++ b/src/Compilers/CSharp/CscCore/csc.exe.config
@@ -20,11 +20,11 @@
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Collections.Immutable" culture="neutral" publicKeyToken="b03f5f7f11d50a3a" />
-        <bindingRedirect oldVersion="1.1.0.0-1.1.65535.65535" newVersion="1.1.37.0" />
+        <bindingRedirect oldVersion="0.0.0.0-1.2.0.0" newVersion="1.2.0.0" />
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Reflection.Metadata" culture="neutral" publicKeyToken="b03f5f7f11d50a3a" />
-        <bindingRedirect oldVersion="1.0.0.0-1.1.65535.65535" newVersion="1.2.0.0" />
+        <bindingRedirect oldVersion="0.0.0.0-1.3.0.0" newVersion="1.3.0.0" />
       </dependentAssembly>
     </assemblyBinding>
   </runtime>
diff --git a/src/Compilers/VisualBasic/VbcCore/vbc.exe.config b/src/Compilers/VisualBasic/VbcCore/vbc.exe.config
index b3e28373c43f6bc041f0fb9bb450c8851a93e351..e8912d2a0bf474f6f046c6e9d3eceae2046e44f5 100644
--- a/src/Compilers/VisualBasic/VbcCore/vbc.exe.config
+++ b/src/Compilers/VisualBasic/VbcCore/vbc.exe.config
@@ -20,11 +20,11 @@
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Collections.Immutable" culture="neutral" publicKeyToken="b03f5f7f11d50a3a" />
-        <bindingRedirect oldVersion="1.1.0.0-1.1.65535.65535" newVersion="1.1.37.0" />
+        <bindingRedirect oldVersion="0.0.0.0-1.2.0.0" newVersion="1.2.0.0" />
       </dependentAssembly>
       <dependentAssembly>
         <assemblyIdentity name="System.Reflection.Metadata" culture="neutral" publicKeyToken="b03f5f7f11d50a3a" />
-        <bindingRedirect oldVersion="1.0.0.0-1.1.65535.65535" newVersion="1.2.0.0" />
+        <bindingRedirect oldVersion="0.0.0.0-1.3.0.0" newVersion="1.3.0.0" />
       </dependentAssembly>
     </assemblyBinding>
   </runtime>
diff --git a/src/ProjectSystem/DeployTestDependencies/project.json b/src/ProjectSystem/DeployTestDependencies/project.json
index 46a52ea4b5cfadc05c06cd8c5fee6a8f5a21cc25..3ad8db5eb0f7fa5ca35166baa9339ce28d550fcf 100644
--- a/src/ProjectSystem/DeployTestDependencies/project.json
+++ b/src/ProjectSystem/DeployTestDependencies/project.json
@@ -4,7 +4,7 @@
     "xunit.runner.console": "2.1.0",
     "xunit.runner.visualstudio": "2.1.0",
     "Moq": "4.2.1402.2112",
-    "System.Collections.Immutable": "1.1.37"
+    "System.Collections.Immutable": "1.2.0-rc3-24005-00"
   },
   "frameworks": {
     "net46": { }