diff --git a/Package/nuget/IronPython.nuspec b/Package/nuget/IronPython.nuspec
index 692672600..7170419de 100644
--- a/Package/nuget/IronPython.nuspec
+++ b/Package/nuget/IronPython.nuspec
@@ -20,11 +20,11 @@ This package contains the IronPython interpreter engine.</description>
     <dependencies>
       <group targetFramework="net462">
         <dependency id="DynamicLanguageRuntime" version="1.3.2" />
-        <dependency id="System.Memory" version="4.5.4" />
+        <dependency id="System.Memory" version="4.5.5" />
       </group>
       <group targetFramework="netstandard2.0">
         <dependency id="DynamicLanguageRuntime" version="1.3.2" />
-        <dependency id="System.Memory" version="4.5.4" />
+        <dependency id="System.Memory" version="4.5.5" />
         <dependency id="System.Text.Encoding.CodePages" version="4.6.0" />
         <dependency id="Microsoft.Win32.Registry" version="4.5.0" />
         <dependency id="Mono.Unix" version="7.1.0-final.1.21458.1" />