diff --git a/DateTimeOnly/DateTimeOnly.csproj b/DateTimeOnly/DateTimeOnly.csproj
index cf8177e..37b72c0 100644
--- a/DateTimeOnly/DateTimeOnly.csproj
+++ b/DateTimeOnly/DateTimeOnly.csproj
@@ -82,7 +82,7 @@
   </ItemGroup>
 
   <ItemGroup Condition="$(TargetFramework.StartsWith('net4')) OR '$(TargetFramework)' == 'netstandard2.0'">
-    <PackageReference Include="System.Memory" Version="4.5.4" PrivateAssets="compile;contentfiles;build;analyzers" />
+    <PackageReference Include="System.Memory" Version="4.5.5" PrivateAssets="compile;contentfiles;build;analyzers" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/DateTimeOnly/packages.lock.json b/DateTimeOnly/packages.lock.json
index a13cbc1..549a710 100644
--- a/DateTimeOnly/packages.lock.json
+++ b/DateTimeOnly/packages.lock.json
@@ -8,6 +8,15 @@
         "resolved": "0.2.12-alpha",
         "contentHash": "uu3yAa6hQZJoJZfBwXSvh+bN03KO06sWNZXwodxz7J1wva1g1+O4TnWJxX4dmsP6tLDTZtKy8IHiPLOOZIwt9w=="
       },
+      "Microsoft.NETFramework.ReferenceAssemblies": {
+        "type": "Direct",
+        "requested": "[1.0.2, )",
+        "resolved": "1.0.2",
+        "contentHash": "5/cSEVld+px/CuRrbohO/djfg6++eR6zGpy88MgqloXvkj//WXWpFZyu/OpkXPN0u5m+dN/EVwLNYFUxD4h2+A==",
+        "dependencies": {
+          "Microsoft.NETFramework.ReferenceAssemblies.net462": "1.0.2"
+        }
+      },
       "Microsoft.SourceLink.GitHub": {
         "type": "Direct",
         "requested": "[1.1.1, )",
@@ -20,9 +29,9 @@
       },
       "System.Memory": {
         "type": "Direct",
-        "requested": "[4.5.4, )",
-        "resolved": "4.5.4",
-        "contentHash": "1MbJTHS1lZ4bS4FmsJjnuGJOu88ZzTT2rLvrhW7Ygic+pC0NWA+3hgAen0HRdsocuQXCkUTdFn9yHJJhsijDXw==",
+        "requested": "[4.5.5, )",
+        "resolved": "4.5.5",
+        "contentHash": "XIWiDvKPXaTveaB7HVganDlOCRoj03l+jrwNvcge/t8vhGYKvqV+dMv6G4SAX2NoNmN0wZfVPTAlFwZcZvVOUw==",
         "dependencies": {
           "System.Buffers": "4.5.1",
           "System.Numerics.Vectors": "4.5.0",
@@ -34,6 +43,11 @@
         "resolved": "1.1.1",
         "contentHash": "AT3HlgTjsqHnWpBHSNeR0KxbLZD7bztlZVj7I8vgeYG9SYqbeFGh0TM/KVtC6fg53nrWHl3VfZFvb5BiQFcY6Q=="
       },
+      "Microsoft.NETFramework.ReferenceAssemblies.net462": {
+        "type": "Transitive",
+        "resolved": "1.0.2",
+        "contentHash": "vnWMOt5+4SLOLu5hlB54LMK5OHqsX+5ekbo6vb7USvCM5uA4UKtATuMvIAw69ak62F94c+3895XwF5TcjjzpVw=="
+      },
       "Microsoft.SourceLink.Common": {
         "type": "Transitive",
         "resolved": "1.1.1",
@@ -83,9 +97,9 @@
       },
       "System.Memory": {
         "type": "Direct",
-        "requested": "[4.5.4, )",
-        "resolved": "4.5.4",
-        "contentHash": "1MbJTHS1lZ4bS4FmsJjnuGJOu88ZzTT2rLvrhW7Ygic+pC0NWA+3hgAen0HRdsocuQXCkUTdFn9yHJJhsijDXw==",
+        "requested": "[4.5.5, )",
+        "resolved": "4.5.5",
+        "contentHash": "XIWiDvKPXaTveaB7HVganDlOCRoj03l+jrwNvcge/t8vhGYKvqV+dMv6G4SAX2NoNmN0wZfVPTAlFwZcZvVOUw==",
         "dependencies": {
           "System.Buffers": "4.5.1",
           "System.Numerics.Vectors": "4.4.0",