diff --git a/examples/cp/cp.csproj b/examples/cp/cp.csproj
index 27cff03..1d0adb2 100644
--- a/examples/cp/cp.csproj
+++ b/examples/cp/cp.csproj
@@ -5,7 +5,7 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="SharpZipLib" Version="1.3.3" />
+    <PackageReference Include="SharpZipLib" Version="1.4.0" />
   </ItemGroup>
 
 </Project>
diff --git a/tests/E2E.Tests/E2E.Tests.csproj b/tests/E2E.Tests/E2E.Tests.csproj
index 55bc117..4faab8f 100644
--- a/tests/E2E.Tests/E2E.Tests.csproj
+++ b/tests/E2E.Tests/E2E.Tests.csproj
@@ -9,7 +9,7 @@
   <ItemGroup>
 
     <PackageReference Include="JsonPatch.Net" Version="2.0.4" />
-    <PackageReference Include="SharpZipLib" Version="1.3.3" />
+    <PackageReference Include="SharpZipLib" Version="1.4.0" />
 
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.3.1" />