diff --git a/backend/.config/dotnet-tools.json b/backend/.config/dotnet-tools.json
index 7dcefc3..807729e 100644
--- a/backend/.config/dotnet-tools.json
+++ b/backend/.config/dotnet-tools.json
@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "dotnet-ef": {
-      "version": "10.0.8",
+      "version": "10.0.9",
       "commands": [
         "dotnet-ef"
       ],
diff --git a/backend/src/CheapAnalysis.Ibkr.Contracts/CheapAnalysis.Ibkr.Contracts.csproj b/backend/src/CheapAnalysis.Ibkr.Contracts/CheapAnalysis.Ibkr.Contracts.csproj
index 38f28e3..1e03879 100644
--- a/backend/src/CheapAnalysis.Ibkr.Contracts/CheapAnalysis.Ibkr.Contracts.csproj
+++ b/backend/src/CheapAnalysis.Ibkr.Contracts/CheapAnalysis.Ibkr.Contracts.csproj
@@ -24,7 +24,7 @@
   <ItemGroup>
     <PackageReference Include="Google.Protobuf" Version="3.35.0" />
     <PackageReference Include="Grpc.Core.Api" Version="2.80.0" />
-    <PackageReference Include="Grpc.Tools" Version="2.80.0">
+    <PackageReference Include="Grpc.Tools" Version="2.81.1">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
diff --git a/backend/src/CheapAnalysis.Infrastructure/CheapAnalysis.Infrastructure.csproj b/backend/src/CheapAnalysis.Infrastructure/CheapAnalysis.Infrastructure.csproj
index 522ece0..11fdf4c 100644
--- a/backend/src/CheapAnalysis.Infrastructure/CheapAnalysis.Infrastructure.csproj
+++ b/backend/src/CheapAnalysis.Infrastructure/CheapAnalysis.Infrastructure.csproj
@@ -11,18 +11,18 @@
 
   <ItemGroup>
     <!-- T-005: EF Core + Npgsql -->
-    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="10.0.8" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.8">
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="10.0.9" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="10.0.9">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
     <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="10.0.2" />
-    <PackageReference Include="Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore" Version="10.0.8" />
+    <PackageReference Include="Microsoft.Extensions.Diagnostics.HealthChecks.EntityFrameworkCore" Version="10.0.9" />
     <!-- T-018: Redis-backed Idempotency-Key store. -->
-    <PackageReference Include="StackExchange.Redis" Version="2.8.16" />
+    <PackageReference Include="StackExchange.Redis" Version="2.13.17" />
     <!-- Pin transitive: Npgsql 10.0.0 pulls System.Security.Cryptography.Xml 9.0.0,
          which carries GHSA-37gx-xxp4-5rgx / GHSA-w3x6-4m5h-cxqf. 10.0.8 is patched. -->
-    <PackageReference Include="System.Security.Cryptography.Xml" Version="10.0.8" />
+    <PackageReference Include="System.Security.Cryptography.Xml" Version="10.0.9" />
   </ItemGroup>
 
   <ItemGroup>
diff --git a/backend/tests/CheapAnalysis.E2ETests/CheapAnalysis.E2ETests.csproj b/backend/tests/CheapAnalysis.E2ETests/CheapAnalysis.E2ETests.csproj
index 91e39df..7997b08 100644
--- a/backend/tests/CheapAnalysis.E2ETests/CheapAnalysis.E2ETests.csproj
+++ b/backend/tests/CheapAnalysis.E2ETests/CheapAnalysis.E2ETests.csproj
@@ -7,8 +7,8 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
-    <PackageReference Include="xunit" Version="2.7.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.7">
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
diff --git a/backend/tests/CheapAnalysis.IntegrationTests/CheapAnalysis.IntegrationTests.csproj b/backend/tests/CheapAnalysis.IntegrationTests/CheapAnalysis.IntegrationTests.csproj
index 01380d1..6bac677 100644
--- a/backend/tests/CheapAnalysis.IntegrationTests/CheapAnalysis.IntegrationTests.csproj
+++ b/backend/tests/CheapAnalysis.IntegrationTests/CheapAnalysis.IntegrationTests.csproj
@@ -13,8 +13,8 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
-    <PackageReference Include="xunit" Version="2.7.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.7">
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
diff --git a/backend/tests/CheapAnalysis.UnitTests/CheapAnalysis.UnitTests.csproj b/backend/tests/CheapAnalysis.UnitTests/CheapAnalysis.UnitTests.csproj
index e6c3fec..d97f03e 100644
--- a/backend/tests/CheapAnalysis.UnitTests/CheapAnalysis.UnitTests.csproj
+++ b/backend/tests/CheapAnalysis.UnitTests/CheapAnalysis.UnitTests.csproj
@@ -7,8 +7,8 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="18.6.0" />
-    <PackageReference Include="xunit" Version="2.7.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.7">
+    <PackageReference Include="xunit" Version="2.9.3" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.8.2">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
@@ -16,7 +16,7 @@
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
-    <PackageReference Include="NSubstitute" Version="5.1.0" />
+    <PackageReference Include="NSubstitute" Version="5.3.0" />
     <PackageReference Include="FluentAssertions" Version="8.10.0" />
   </ItemGroup>