diff --git a/build/Version.props b/build/Version.props
index 26c9fcf515..35126b239a 100644
--- a/build/Version.props
+++ b/build/Version.props
@@ -12,6 +12,7 @@
     <TgsDmapiVersion>7.3.0</TgsDmapiVersion>
     <TgsInteropVersion>5.10.0</TgsInteropVersion>
     <TgsHostWatchdogVersion>1.5.0</TgsHostWatchdogVersion>
+    <TgsSwarmProtocolVersion>7.0.0</TgsSwarmProtocolVersion>
     <TgsContainerScriptVersion>1.2.1</TgsContainerScriptVersion>
     <TgsMigratorVersion>2.0.0</TgsMigratorVersion>
     <TgsNugetNetFramework>netstandard2.0</TgsNugetNetFramework>
diff --git a/src/Tgstation.Server.Host/Controllers/SwarmController.cs b/src/Tgstation.Server.Host/Controllers/SwarmController.cs
index cdaa834d46..dd57e45138 100644
--- a/src/Tgstation.Server.Host/Controllers/SwarmController.cs
+++ b/src/Tgstation.Server.Host/Controllers/SwarmController.cs
@@ -14,8 +14,8 @@ using Serilog.Context;
 
 using Tgstation.Server.Host.Configuration;
 using Tgstation.Server.Host.Extensions;
+using Tgstation.Server.Host.Properties;
 using Tgstation.Server.Host.Swarm;
-using Tgstation.Server.Host.System;
 using Tgstation.Server.Host.Transfer;
 using Tgstation.Server.Host.Utils;
 
@@ -44,11 +44,6 @@ namespace Tgstation.Server.Host.Controllers
 		/// </summary>
 		readonly IFileTransferStreamHandler transferService;
 
-		/// <summary>
-		/// The <see cref="IAssemblyInformationProvider"/> for the <see cref="SwarmController"/>.
-		/// </summary>
-		readonly IAssemblyInformationProvider assemblyInformationProvider;
-
 		/// <summary>
 		/// The <see cref="ILogger"/> for the <see cref="SwarmController"/>.
 		/// </summary>
@@ -63,19 +58,16 @@ namespace Tgstation.Server.Host.Controllers
 		/// Initializes a new instance of the <see cref="SwarmController"/> class.
 		/// </summary>
 		/// <param name="swarmOperations">The value of <see cref="swarmOperations"/>.</param>
-		/// <param name="assemblyInformationProvider">The value of <see cref="assemblyInformationProvider"/>.</param>
 		/// <param name="transferService">The value of <see cref="transferService"/>.</param>
 		/// <param name="swarmConfigurationOptions">The <see cref="IOptions{TOptions}"/> containing the value of <see cref="swarmConfiguration"/>.</param>
 		/// <param name="logger">The value of <see cref="logger"/>.</param>
 		public SwarmController(
 			ISwarmOperations swarmOperations,
-			IAssemblyInformationProvider assemblyInformationProvider,
 			IFileTransferStreamHandler transferService,
 			IOptions<SwarmConfiguration> swarmConfigurationOptions,
 			ILogger<SwarmController> logger)
 		{
 			this.swarmOperations = swarmOperations ?? throw new ArgumentNullException(nameof(swarmOperations));
-			this.assemblyInformationProvider = assemblyInformationProvider ?? throw new ArgumentNullException(nameof(assemblyInformationProvider));
 			this.transferService = transferService ?? throw new ArgumentNullException(nameof(transferService));
 			swarmConfiguration = swarmConfigurationOptions?.Value ?? throw new ArgumentNullException(nameof(swarmConfigurationOptions));
 			this.logger = logger;
@@ -92,12 +84,17 @@ namespace Tgstation.Server.Host.Controllers
 		{
 			ArgumentNullException.ThrowIfNull(registrationRequest);
 
-			if (registrationRequest.ServerVersion != assemblyInformationProvider.Version)
+			var swarmProtocolVersion = Version.Parse(MasterVersionsAttribute.Instance.RawSwarmProtocolVersion);
+			if (registrationRequest.ServerVersion?.Major != swarmProtocolVersion.Major)
 				return StatusCode((int)HttpStatusCode.UpgradeRequired);
 
 			var registrationResult = await swarmOperations.RegisterNode(registrationRequest, RequestRegistrationId, cancellationToken);
 			if (registrationResult == null)
 				return Conflict();
+
+			if (registrationRequest.ServerVersion != swarmProtocolVersion)
+				logger.LogWarning("Allowed node {identifier} to register despite having a slightly different swarm protocol version!", registrationRequest.Identifier);
+
 			return Json(registrationResult);
 		}
 
diff --git a/src/Tgstation.Server.Host/Database/DatabaseContext.cs b/src/Tgstation.Server.Host/Database/DatabaseContext.cs
index dbf724e45d..d79bb709f9 100644
--- a/src/Tgstation.Server.Host/Database/DatabaseContext.cs
+++ b/src/Tgstation.Server.Host/Database/DatabaseContext.cs
@@ -445,6 +445,7 @@ namespace Tgstation.Server.Host.Database
 		// HEY YOU
 		// IF YOU HAVE A TEST THAT'S CREATING ERRORS BECAUSE THESE VALUES AREN'T SET CORRECTLY THERE'S MORE TO FIXING IT THAN JUST UPDATING THEM
 		// IN THE FUNCTION BELOW YOU ALSO NEED TO CORRECTLY SET THE RIGHT MIGRATION TO DOWNGRADE TO FOR THE LAST TGS VERSION
+		// YOU ALSO NEED TO UPDATE THE SWARM PROTOCOL MAJOR VERSION
 		// IF THIS BREAKS AGAIN I WILL PERSONALLY HAUNT YOUR ASS WHEN I DIE
 
 		/// <summary>
@@ -480,6 +481,7 @@ namespace Tgstation.Server.Host.Database
 
 			string BadDatabaseType() => throw new ArgumentException($"Invalid DatabaseType: {currentDatabaseType}", nameof(currentDatabaseType));
 
+			// !!! DON'T FORGET TO UPDATE THE SWARM PROTOCOL MAJOR VERSION !!!
 			if (targetVersion < new Version(6, 7, 0))
 				targetMigration = currentDatabaseType switch
 				{
diff --git a/src/Tgstation.Server.Host/Properties/MasterVersionsAttribute.cs b/src/Tgstation.Server.Host/Properties/MasterVersionsAttribute.cs
index d77bcd349b..8212c4ffee 100644
--- a/src/Tgstation.Server.Host/Properties/MasterVersionsAttribute.cs
+++ b/src/Tgstation.Server.Host/Properties/MasterVersionsAttribute.cs
@@ -41,6 +41,11 @@ namespace Tgstation.Server.Host.Properties
 		/// </summary>
 		public string RawMariaDBRedistVersion { get; }
 
+		/// <summary>
+		/// The <see cref="Version"/> <see cref="string"/> of the MariaDB server bundled with TGS installs.
+		/// </summary>
+		public string RawSwarmProtocolVersion { get; }
+
 		/// <summary>
 		/// Initializes a new instance of the <see cref="MasterVersionsAttribute"/> class.
 		/// </summary>
@@ -49,18 +54,21 @@ namespace Tgstation.Server.Host.Properties
 		/// <param name="rawWebpanelVersion">The value of <see cref="RawWebpanelVersion"/>.</param>
 		/// <param name="rawHostWatchdogVersion">The value of <see cref="RawHostWatchdogVersion"/>.</param>
 		/// <param name="rawMariaDBRedistVersion">The value of <see cref="RawMariaDBRedistVersion"/>.</param>
+		/// <param name="rawSwarmProtocolVersion">The value of <see cref="RawSwarmProtocolVersion"/>.</param>
 		public MasterVersionsAttribute(
 			string rawConfigurationVersion,
 			string rawInteropVersion,
 			string rawWebpanelVersion,
 			string rawHostWatchdogVersion,
-			string rawMariaDBRedistVersion)
+			string rawMariaDBRedistVersion,
+			string rawSwarmProtocolVersion)
 		{
 			RawConfigurationVersion = rawConfigurationVersion ?? throw new ArgumentNullException(nameof(rawConfigurationVersion));
 			RawInteropVersion = rawInteropVersion ?? throw new ArgumentNullException(nameof(rawInteropVersion));
 			RawWebpanelVersion = rawWebpanelVersion ?? throw new ArgumentNullException(nameof(rawWebpanelVersion));
 			RawHostWatchdogVersion = rawHostWatchdogVersion ?? throw new ArgumentNullException(nameof(rawHostWatchdogVersion));
 			RawMariaDBRedistVersion = rawMariaDBRedistVersion ?? throw new ArgumentNullException(nameof(rawMariaDBRedistVersion));
+			RawSwarmProtocolVersion = rawSwarmProtocolVersion ?? throw new ArgumentNullException(nameof(rawSwarmProtocolVersion));
 		}
 	}
 }
diff --git a/src/Tgstation.Server.Host/Swarm/SwarmRegistrationRequest.cs b/src/Tgstation.Server.Host/Swarm/SwarmRegistrationRequest.cs
index 229d4d28d2..f6bda1ac47 100644
--- a/src/Tgstation.Server.Host/Swarm/SwarmRegistrationRequest.cs
+++ b/src/Tgstation.Server.Host/Swarm/SwarmRegistrationRequest.cs
@@ -11,7 +11,7 @@ namespace Tgstation.Server.Host.Swarm
 	public sealed class SwarmRegistrationRequest : SwarmServer
 	{
 		/// <summary>
-		/// The TGS <see cref="Version"/> of the sending server.
+		/// The swarm protocol <see cref="Version"/> of the sending server. Named this way due to legacy reasons.
 		/// </summary>
 		[Required]
 		public Version ServerVersion { get; }
diff --git a/src/Tgstation.Server.Host/Swarm/SwarmService.cs b/src/Tgstation.Server.Host/Swarm/SwarmService.cs
index c62148b4be..82b2a9140d 100644
--- a/src/Tgstation.Server.Host/Swarm/SwarmService.cs
+++ b/src/Tgstation.Server.Host/Swarm/SwarmService.cs
@@ -24,6 +24,7 @@ using Tgstation.Server.Host.Configuration;
 using Tgstation.Server.Host.Core;
 using Tgstation.Server.Host.Database;
 using Tgstation.Server.Host.IO;
+using Tgstation.Server.Host.Properties;
 using Tgstation.Server.Host.Security;
 using Tgstation.Server.Host.System;
 using Tgstation.Server.Host.Transfer;
@@ -34,7 +35,9 @@ namespace Tgstation.Server.Host.Swarm
 	/// <summary>
 	/// Helps keep servers connected to the same database in sync by coordinating updates.
 	/// </summary>
+#pragma warning disable CA1506 // TODO: Decomplexify
 	sealed class SwarmService : ISwarmService, ISwarmServiceController, ISwarmOperations, IDisposable
+#pragma warning restore CA1506
 	{
 		/// <inheritdoc />
 		public bool ExpectedNumberOfNodesConnected
@@ -1282,7 +1285,7 @@ namespace Tgstation.Server.Host.Swarm
 				null,
 				HttpMethod.Post,
 				SwarmConstants.RegisterRoute,
-				new SwarmRegistrationRequest(assemblyInformationProvider.Version)
+				new SwarmRegistrationRequest(Version.Parse(MasterVersionsAttribute.Instance.RawSwarmProtocolVersion))
 				{
 					Identifier = swarmConfiguration.Identifier,
 					Address = swarmConfiguration.Address,
diff --git a/src/Tgstation.Server.Host/Tgstation.Server.Host.csproj b/src/Tgstation.Server.Host/Tgstation.Server.Host.csproj
index 9d41344040..49c85ec6e3 100644
--- a/src/Tgstation.Server.Host/Tgstation.Server.Host.csproj
+++ b/src/Tgstation.Server.Host/Tgstation.Server.Host.csproj
@@ -56,6 +56,7 @@
         <_Parameter3>$(TgsWebpanelVersion)</_Parameter3>
         <_Parameter4>$(TgsHostWatchdogVersion)</_Parameter4>
         <_Parameter5>$(TgsMariaDBRedistVersion)</_Parameter5>
+        <_Parameter6>$(TgsSwarmProtocolVersion)</_Parameter6>
       </MasterVersionAssemblyAttributes>
     </ItemGroup>
     <WriteCodeFragment AssemblyAttributes="@(MasterVersionAssemblyAttributes)" Language="C#" OutputDirectory="$(IntermediateOutputPath)" OutputFile="MasterVersionsAssemblyInfo.cs">
diff --git a/tests/Tgstation.Server.Host.Tests/Swarm/TestableSwarmNode.cs b/tests/Tgstation.Server.Host.Tests/Swarm/TestableSwarmNode.cs
index c293318381..664729e966 100644
--- a/tests/Tgstation.Server.Host.Tests/Swarm/TestableSwarmNode.cs
+++ b/tests/Tgstation.Server.Host.Tests/Swarm/TestableSwarmNode.cs
@@ -8,6 +8,7 @@ using System.Threading.Tasks;
 using Microsoft.AspNetCore.Identity;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
+using Microsoft.IdentityModel.Tokens;
 using Microsoft.VisualStudio.TestTools.UnitTesting;
 
 using Moq;
@@ -20,6 +21,7 @@ using Tgstation.Server.Host.Controllers;
 using Tgstation.Server.Host.Core;
 using Tgstation.Server.Host.Database;
 using Tgstation.Server.Host.IO;
+using Tgstation.Server.Host.Models;
 using Tgstation.Server.Host.Security;
 using Tgstation.Server.Host.System;
 using Tgstation.Server.Host.Transfer;
@@ -75,6 +77,24 @@ namespace Tgstation.Server.Host.Swarm.Tests
 			}
 		}
 
+		private class MockTokenFactory : ITokenFactory
+		{
+			public ReadOnlySpan<byte> SigningKey
+			{
+				get => [0, 1, 2, 3, 4];
+				set
+				{
+				}
+			}
+
+			public TokenValidationParameters ValidationParameters => throw new NotSupportedException();
+
+			public TokenResponse CreateToken(User user, bool oAuth)
+			{
+				throw new NotSupportedException();
+			}
+		}
+
 		public TestableSwarmNode(
 			ILoggerFactory loggerFactory,
 			SwarmConfiguration swarmConfiguration,
@@ -138,7 +158,6 @@ namespace Tgstation.Server.Host.Swarm.Tests
 			RpcMapper = new SwarmRpcMapper(
 				(targetService, targetTransfer) => new SwarmController(
 					targetService,
-					mockAssemblyInformationProvider.Object,
 					targetTransfer,
 					mockOptions.Object,
 					loggerFactory.CreateLogger<SwarmController>()),
@@ -154,6 +173,8 @@ namespace Tgstation.Server.Host.Swarm.Tests
 
 			logger = loggerFactory.CreateLogger($"TestableSwarmNode-{swarmConfiguration.Identifier}");
 
+			var mockTokenFactory = new MockTokenFactory();
+
 			var runCount = 0;
 			void RecreateControllerAndService()
 			{
@@ -180,6 +201,7 @@ namespace Tgstation.Server.Host.Swarm.Tests
 					mockAsyncDelayer.Object,
 					mockServerUpdater.Object,
 					TransferService,
+					mockTokenFactory,
 					mockOptions.Object,
 					serviceLogger);
 			}