diff --git a/pkgs/sdk/client/src/LaunchDarkly.ClientSdk.csproj b/pkgs/sdk/client/src/LaunchDarkly.ClientSdk.csproj
index a4e2ab59..440b31b5 100644
--- a/pkgs/sdk/client/src/LaunchDarkly.ClientSdk.csproj
+++ b/pkgs/sdk/client/src/LaunchDarkly.ClientSdk.csproj
@@ -50,7 +50,7 @@
         <Folder Include="Properties\"/>
         <PackageReference Include="System.Numerics.Vectors" Version="4.5.0"/>
         <PackageReference Include="LaunchDarkly.CommonSdk" Version="7.2.0"/>
-        <PackageReference Include="LaunchDarkly.EventSource" Version="5.2.1"/>
+        <PackageReference Include="LaunchDarkly.EventSource" Version="5.3.1"/>
         <PackageReference Include="LaunchDarkly.InternalSdk" Version="3.7.0" />
         <PackageReference Include="LaunchDarkly.Logging" Version="2.0.0"/>
         <PackageReference Include="Microsoft.Maui.Essentials" Version="8.0.100" />
diff --git a/pkgs/sdk/server/src/LaunchDarkly.ServerSdk.csproj b/pkgs/sdk/server/src/LaunchDarkly.ServerSdk.csproj
index 5cd42c40..65fb1e2d 100644
--- a/pkgs/sdk/server/src/LaunchDarkly.ServerSdk.csproj
+++ b/pkgs/sdk/server/src/LaunchDarkly.ServerSdk.csproj
@@ -47,7 +47,7 @@
   <ItemGroup>
     <PackageReference Include="LaunchDarkly.Cache" Version="1.0.2" />
     <PackageReference Include="LaunchDarkly.CommonSdk" Version="7.2.0" />
-    <PackageReference Include="LaunchDarkly.EventSource" Version="5.3.0" />
+    <PackageReference Include="LaunchDarkly.EventSource" Version="5.3.1" />
     <PackageReference Include="LaunchDarkly.InternalSdk" Version="3.6.1" />
     <PackageReference Include="LaunchDarkly.Logging" Version="2.0.0" />
   </ItemGroup>