diff --git a/src/OpenPolicyAgent.Opa.AspNetCore/OpenPolicyAgent.Opa.AspNetCore.csproj b/src/OpenPolicyAgent.Opa.AspNetCore/OpenPolicyAgent.Opa.AspNetCore.csproj
index f0be2ed..4218436 100644
--- a/src/OpenPolicyAgent.Opa.AspNetCore/OpenPolicyAgent.Opa.AspNetCore.csproj
+++ b/src/OpenPolicyAgent.Opa.AspNetCore/OpenPolicyAgent.Opa.AspNetCore.csproj
@@ -27,7 +27,7 @@
     <PackageReference Include="newtonsoft.json" Version="13.0.3" />
     <PackageReference Include="nodatime" Version="3.2.2" />
     <PackageReference Include="Microsoft.Extensions.Logging" Version="9.0.9" />
-    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="9.0.8" />
-    <PackageReference Include="OpenPolicyAgent.Opa" Version="1.5.4" />
+    <PackageReference Include="Microsoft.Extensions.Logging.Console" Version="9.0.9" />
+    <PackageReference Include="OpenPolicyAgent.Opa" Version="1.6.6" />
   </ItemGroup>
 </Project>
diff --git a/test/OpenPolicyAgent.Opa.AspNetCore.Tests/OpenPolicyAgent.Opa.AspNetCore.Tests.csproj b/test/OpenPolicyAgent.Opa.AspNetCore.Tests/OpenPolicyAgent.Opa.AspNetCore.Tests.csproj
index 2ea2d51..4747f7a 100644
--- a/test/OpenPolicyAgent.Opa.AspNetCore.Tests/OpenPolicyAgent.Opa.AspNetCore.Tests.csproj
+++ b/test/OpenPolicyAgent.Opa.AspNetCore.Tests/OpenPolicyAgent.Opa.AspNetCore.Tests.csproj
@@ -28,7 +28,7 @@
 
   <!-- OPA API Reference. -->
   <ItemGroup>
-    <PackageReference Include="OpenPolicyAgent.Opa" Version="1.5.4" />
+    <PackageReference Include="OpenPolicyAgent.Opa" Version="1.6.6" />
   </ItemGroup>
 
   <!-- Ensure our data files are copied next to the test executables. -->