diff --git a/nuget/Opc.Ua.Symbols.nuspec b/nuget/Opc.Ua.Symbols.nuspec
index 9ccd6865d8..ee8e57cc0d 100644
--- a/nuget/Opc.Ua.Symbols.nuspec
+++ b/nuget/Opc.Ua.Symbols.nuspec
@@ -16,13 +16,13 @@
         <dependency id="Microsoft.AspNetCore.Server.Kestrel" version="1.1.3"/>
         <dependency id="Microsoft.AspNetCore.Server.Kestrel.Https" version= "1.1.3"/>
         <dependency id="Newtonsoft.Json" version="10.0.3"/>
-        <dependency id="Portable.BouncyCastle" version="1.8.1.3"/>
+        <dependency id="Portable.BouncyCastle" version="1.8.4"/>
       </group>
       <group targetFramework="netstandard1.3" >
         <dependency id="Microsoft.AspNetCore.Server.Kestrel" version="1.1.3"/>
         <dependency id="Microsoft.AspNetCore.Server.Kestrel.Https" version= "1.1.3"/>
         <dependency id="Newtonsoft.Json" version="10.0.3"/>
-        <dependency id="Portable.BouncyCastle" version="1.8.1.3"/>
+        <dependency id="Portable.BouncyCastle" version="1.8.4"/>
         <dependency id="System.Data.Common" version="4.3.0"/>
         <dependency id="System.ServiceModel.Primitives" version="4.5.3"/>
         <dependency id="System.Net.NameResolution" version="4.3.0"/>
@@ -36,7 +36,7 @@
         <dependency id="Microsoft.AspNetCore.Server.Kestrel" version="2.0.1"/>
         <dependency id="Microsoft.AspNetCore.Server.Kestrel.Https" version= "2.0.1"/>
         <dependency id="Newtonsoft.Json" version="10.0.3"/>
-        <dependency id="Portable.BouncyCastle" version="1.8.1.3"/>
+        <dependency id="Portable.BouncyCastle" version="1.8.4"/>
         <dependency id="System.Data.Common" version="4.3.0"/>
         <dependency id="System.ServiceModel.Primitives" version="4.5.3"/>
         <dependency id="System.Net.NameResolution" version="4.3.0"/>
diff --git a/nuget/Opc.Ua.nuspec b/nuget/Opc.Ua.nuspec
index bbf9e4a9f8..2713bb2f2a 100644
--- a/nuget/Opc.Ua.nuspec
+++ b/nuget/Opc.Ua.nuspec
@@ -16,13 +16,13 @@
         <dependency id="Microsoft.AspNetCore.Server.Kestrel" version="1.1.3"/>
         <dependency id="Microsoft.AspNetCore.Server.Kestrel.Https" version= "1.1.3"/>
         <dependency id="Newtonsoft.Json" version="10.0.3"/>
-        <dependency id="Portable.BouncyCastle" version="1.8.1.3"/>
+        <dependency id="Portable.BouncyCastle" version="1.8.4"/>
       </group>
       <group targetFramework="netstandard1.3" >
         <dependency id="Microsoft.AspNetCore.Server.Kestrel" version="1.1.3"/>
         <dependency id="Microsoft.AspNetCore.Server.Kestrel.Https" version= "1.1.3"/>
         <dependency id="Newtonsoft.Json" version="10.0.3"/>
-        <dependency id="Portable.BouncyCastle" version="1.8.1.3"/>
+        <dependency id="Portable.BouncyCastle" version="1.8.4"/>
         <dependency id="System.Data.Common" version="4.3.0"/>
         <dependency id="System.ServiceModel.Primitives" version="4.5.3"/>
         <dependency id="System.Net.NameResolution" version="4.3.0"/>
@@ -36,7 +36,7 @@
         <dependency id="Microsoft.AspNetCore.Server.Kestrel" version="2.0.1"/>
         <dependency id="Microsoft.AspNetCore.Server.Kestrel.Https" version= "2.0.1"/>
         <dependency id="Newtonsoft.Json" version="10.0.3"/>
-        <dependency id="Portable.BouncyCastle" version="1.8.1.3"/>
+        <dependency id="Portable.BouncyCastle" version="1.8.4"/>
         <dependency id="System.Data.Common" version="4.3.0"/>
         <dependency id="System.ServiceModel.Primitives" version="4.5.3"/>
         <dependency id="System.Net.NameResolution" version="4.3.0"/>