diff --git a/PluralKit.API/Controllers/AccountController.cs b/PluralKit.API/Controllers/AccountController.cs
index e8757c1b..e1541b47 100644
--- a/PluralKit.API/Controllers/AccountController.cs
+++ b/PluralKit.API/Controllers/AccountController.cs
@@ -9,8 +9,9 @@ using PluralKit.Core;
 namespace PluralKit.API
 {
     [ApiController]
+    [ApiVersion("1.0")]
     [Route("a")]
-    [Route("v1/a")]
+    [Route( "v{version:apiVersion}/a" )]
     public class AccountController: ControllerBase
     {
         private IDataStore _data;
diff --git a/PluralKit.API/Controllers/MemberController.cs b/PluralKit.API/Controllers/MemberController.cs
index 19f21842..72318a1e 100644
--- a/PluralKit.API/Controllers/MemberController.cs
+++ b/PluralKit.API/Controllers/MemberController.cs
@@ -9,8 +9,9 @@ using PluralKit.Core;
 namespace PluralKit.API
 {
     [ApiController]
+    [ApiVersion("1.0")]
     [Route("m")]
-    [Route("v1/m")]
+    [Route( "v{version:apiVersion}/m" )]
     public class MemberController: ControllerBase
     {
         private IDataStore _data;
diff --git a/PluralKit.API/Controllers/MessageController.cs b/PluralKit.API/Controllers/MessageController.cs
index 49190297..f5a5b849 100644
--- a/PluralKit.API/Controllers/MessageController.cs
+++ b/PluralKit.API/Controllers/MessageController.cs
@@ -24,8 +24,9 @@ namespace PluralKit.API
     }
     
     [ApiController]
-    [Route("v1/msg")]
+    [ApiVersion("1.0")]
     [Route("msg")]
+    [Route( "v{version:apiVersion}/msg" )]
     public class MessageController: ControllerBase
     {
         private IDataStore _data;
diff --git a/PluralKit.API/Controllers/SystemController.cs b/PluralKit.API/Controllers/SystemController.cs
index c3896e7f..9ff9fd6b 100644
--- a/PluralKit.API/Controllers/SystemController.cs
+++ b/PluralKit.API/Controllers/SystemController.cs
@@ -34,8 +34,9 @@ namespace PluralKit.API
     }
 
     [ApiController]
+    [ApiVersion("1.0")]
     [Route("s")]
-    [Route("v1/s")]
+    [Route( "v{version:apiVersion}/s" )]
     public class SystemController : ControllerBase
     {
         private IDataStore _data;
diff --git a/PluralKit.API/PluralKit.API.csproj b/PluralKit.API/PluralKit.API.csproj
index 4f1a137e..62149d74 100644
--- a/PluralKit.API/PluralKit.API.csproj
+++ b/PluralKit.API/PluralKit.API.csproj
@@ -14,6 +14,7 @@
 
     <ItemGroup>
       <PackageReference Include="Microsoft.AspNetCore.Mvc.NewtonsoftJson" Version="3.1.0" />
+      <PackageReference Include="Microsoft.AspNetCore.Mvc.Versioning" Version="4.1.1" />
     </ItemGroup>
 
 </Project>
diff --git a/PluralKit.API/Startup.cs b/PluralKit.API/Startup.cs
index a55dfcf2..cc5fa770 100644
--- a/PluralKit.API/Startup.cs
+++ b/PluralKit.API/Startup.cs
@@ -1,4 +1,4 @@
-using System;
+using System;
 
 using Autofac;
 
@@ -29,6 +29,12 @@ namespace PluralKit.API
             services.AddControllers()
                 .SetCompatibilityVersion(CompatibilityVersion.Latest)
                 .AddNewtonsoftJson(); // sorry MS, this just does *more*
+
+            services.AddApiVersioning(c =>
+            {
+                c.AssumeDefaultVersionWhenUnspecified = true;
+                c.DefaultApiVersion = ApiVersion.Parse("1.0");
+            });
         }
 
         public void ConfigureContainer(ContainerBuilder builder)