diff --git a/JOSE/JOSE.dev.csproj b/JOSE/JOSE.dev.csproj
index 7de13ae..089dd87 100644
--- a/JOSE/JOSE.dev.csproj
+++ b/JOSE/JOSE.dev.csproj
@@ -47,7 +47,7 @@
   
 
   <ItemGroup>
-    <PackageReference Include="PeterO.Cbor" Version="4.0.1" />
+    <PackageReference Include="PeterO.Cbor" Version="4.5.1" />
   </ItemGroup>
   
 
diff --git a/JOSE/JOSE.std10.csproj b/JOSE/JOSE.std10.csproj
index 77f28ba..4f033ef 100644
--- a/JOSE/JOSE.std10.csproj
+++ b/JOSE/JOSE.std10.csproj
@@ -55,7 +55,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="PeterO.Cbor" Version="4.0.1" />
+    <PackageReference Include="PeterO.Cbor" Version="4.5.1" />
     <PackageReference Include="Portable.BouncyCastle" Version="1.8.5" />
   </ItemGroup>
 
diff --git a/JOSE/Test/Test.csproj b/JOSE/Test/Test.csproj
index 20edbc1..4a48fe7 100644
--- a/JOSE/Test/Test.csproj
+++ b/JOSE/Test/Test.csproj
@@ -15,7 +15,7 @@
     <PackageReference Include="MSTest.TestAdapter" Version="1.4.0" />
     <PackageReference Include="MSTest.TestFramework" Version="1.4.0" />
     <PackageReference Include="coverlet.collector" Version="1.0.1" />
-    <PackageReference Include="PeterO.Cbor" Version="4.0.1" />
+    <PackageReference Include="PeterO.Cbor" Version="4.5.1" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/JOSE/packages.config b/JOSE/packages.config
index 8d185d5..cfb5763 100644
--- a/JOSE/packages.config
+++ b/JOSE/packages.config
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="PeterO.Cbor" version="3.0.3" targetFramework="net46" />
+  <package id="PeterO.Cbor" version="4.5.1" targetFramework="net46" />
   <package id="PeterO.Numbers" version="1.0.2" targetFramework="net46" />
   <package id="Portable.BouncyCastle" version="1.8.4" targetFramework="net46" />
 </packages>