diff --git a/src/NzbDrone.Api/Sonarr.Api.csproj b/src/NzbDrone.Api/Sonarr.Api.csproj
index 34a8fe282..91cfeee12 100644
--- a/src/NzbDrone.Api/Sonarr.Api.csproj
+++ b/src/NzbDrone.Api/Sonarr.Api.csproj
@@ -5,7 +5,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="FluentValidation" Version="8.4.0" />
-    <PackageReference Include="Ical.Net" Version="4.2.0" />
+    <PackageReference Include="Ical.Net" Version="4.1.11" />
     <PackageReference Include="Nancy" Version="2.0.0" />
     <PackageReference Include="Nancy.Authentication.Basic" Version="2.0.0" />
     <PackageReference Include="Nancy.Authentication.Forms" Version="2.0.0" />
diff --git a/src/Sonarr.Api.V3/Sonarr.Api.V3.csproj b/src/Sonarr.Api.V3/Sonarr.Api.V3.csproj
index 2a43ab9e8..f149b83a7 100644
--- a/src/Sonarr.Api.V3/Sonarr.Api.V3.csproj
+++ b/src/Sonarr.Api.V3/Sonarr.Api.V3.csproj
@@ -5,7 +5,7 @@
   </PropertyGroup>
   <ItemGroup>
     <PackageReference Include="FluentValidation" Version="8.4.0" />
-    <PackageReference Include="Ical.Net" Version="4.2.0" />
+    <PackageReference Include="Ical.Net" Version="4.1.11" />
     <PackageReference Include="Nancy" Version="2.0.0" />
     <PackageReference Include="Nancy.Authentication.Basic" Version="2.0.0" />
     <PackageReference Include="Nancy.Authentication.Forms" Version="2.0.0" />